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1

Review of Physics Results from the Tevatron: Higgs Boson Physics  

E-Print Network (OSTI)

We review the techniques and results of the searches for the Higgs boson performed by the two Tevatron collaborations, CDF and DO. The Higgs boson predicted by the Standard Model was sought in the mass range 90 GeV$Higgs boson with a mass in the range 115 GeV$Higgs boson mass of $m_H=125$ GeV, studies of Higgs boson properties were performed, including measurements of the product of the cross section times branching the ratio in various production and decay modes, constraints on Higgs boson couplings to fermions and vector bosons, and tests of spin and parity. We also summarize the results of searches for supersymmetric Higgs bosons, and Higgs bosons in other extensions of the Standard Model.

Thomas R. Junk; Aurelio Juste

2015-02-13T23:59:59.000Z

2

Combined results of searches for the standard model Higgs boson in pp collisions at ?s = 7 TeV  

E-Print Network (OSTI)

Combined results are reported from searches for the standard model Higgs boson in proton–proton collisions at ?s = 7 TeV in five Higgs boson decay modes: ??, bb, ?? , WW, and ZZ. The explored Higgs boson mass range is ...

Alver, B.

3

Results of the CMS searches for a standard model Higgs boson  

Science Journals Connector (OSTI)

In this chapter, the results of the searches for a standard model Higgs boson at CMS are presented. After an overview...

Giovanni Petrucciani

2013-01-01T23:59:59.000Z

4

Combined results of searches for the standard model Higgs boson in pp collisions at  

Science Journals Connector (OSTI)

Combined results are reported from searches for the standard model Higgs boson in proton–proton collisions at s = 7 TeV in five Higgs boson decay modes: ??, bb, ??, WW, and ZZ. The explored Higgs boson mass range is 110–600 GeV. The analysed data correspond to an integrated luminosity of 4.6–4.8 fb?1. The expected excluded mass range in the absence of the standard model Higgs boson is 118–543 GeV at 95% CL. The observed results exclude the standard model Higgs boson in the mass range 127–600 GeV at 95% CL, and in the mass range 129–525 GeV at 99% CL. An excess of events above the expected standard model background is observed at the low end of the explored mass range making the observed limits weaker than expected in the absence of a signal. The largest excess, with a local significance of 3.1?, is observed for a Higgs boson mass hypothesis of 124 GeV. The global significance of observing an excess with a local significance ? 3.1 ? anywhere in the search range 110–600 (110–145) GeV is estimated to be 1.5 ? ( 2.1 ? ) . More data are required to ascertain the origin of the observed excess.

S. Chatrchyan; V. Khachatryan; A.M. Sirunyan; A. Tumasyan; W. Adam; T. Bergauer; M. Dragicevic; J. Erö; C. Fabjan; M. Friedl; R. Frühwirth; V.M. Ghete; J. Hammer; M. Hoch; N. Hörmann; J. Hrubec; M. Jeitler; W. Kiesenhofer; M. Krammer; D. Liko; I. Mikulec; M. Pernicka; B. Rahbaran; C. Rohringer; H. Rohringer; R. Schöfbeck; J. Strauss; A. Taurok; F. Teischinger; P. Wagner; W. Waltenberger; G. Walzel; E. Widl; C.-E. Wulz; V. Mossolov; N. Shumeiko; J. Suarez Gonzalez; S. Bansal; L. Benucci; T. Cornelis; E.A. De Wolf; X. Janssen; S. Luyckx; T. Maes; L. Mucibello; S. Ochesanu; B. Roland; R. Rougny; M. Selvaggi; H. Van Haevermaet; P. Van Mechelen; N. Van Remortel; A. Van Spilbeeck; F. Blekman; S. Blyweert; J. D?Hondt; R. Gonzalez Suarez; A. Kalogeropoulos; M. Maes; A. Olbrechts; W. Van Doninck; P. Van Mulders; G.P. Van Onsem; I. Villella; O. Charaf; B. Clerbaux; G. De Lentdecker; V. Dero; A.P.R. Gay; G.H. Hammad; T. Hreus; A. Léonard; P.E. Marage; L. Thomas; C. Vander Velde; P. Vanlaer; J. Wickens; V. Adler; K. Beernaert; A. Cimmino; S. Costantini; G. Garcia; M. Grunewald; B. Klein; J. Lellouch; A. Marinov; J. Mccartin; A.A. Ocampo Rios; D. Ryckbosch; N. Strobbe; F. Thyssen; M. Tytgat; L. Vanelderen; P. Verwilligen; S. Walsh; E. Yazgan; N. Zaganidis; S. Basegmez; G. Bruno; L. Ceard; J. De Favereau De Jeneret; C. Delaere; T. du Pree; D. Favart; L. Forthomme; A. Giammanco; G. Grégoire; J. Hollar; V. Lemaitre; J. Liao; O. Militaru; C. Nuttens; D. Pagano; A. Pin; K. Piotrzkowski; N. Schul; N. Beliy; T. Caebergs; E. Daubie; G.A. Alves; M. Correa Martin Junior; D. De Jesus Damiao; T. Martins; M.E. Pol; M.H.G. Souza; W.L. Aldá Júnior; W. Carvalho; A. Custódio; E.M. Da Costa; C. De Oliveira Martins; S. Fonseca De Souza; D. Matos Figueiredo; L. Mundim; H. Nogima; V. Oguri; W.L. Prado Da Silva; A. Santoro; S.M. Silva Do Amaral; L. Soares Jorge; A. Sznajder; T.S. Anjos; C.A. Bernardes; F.A. Dias; T.R. Fernandez Perez Tomei; E.M. Gregores; C. Lagana; F. Marinho; P.G. Mercadante; S.F. Novaes; Sandra S. Padula; V. Genchev; P. Iaydjiev; S. Piperov; M. Rodozov; S. Stoykova; G. Sultanov; V. Tcholakov; R. Trayanov; M. Vutova; A. Dimitrov; R. Hadjiiska; A. Karadzhinova; V. Kozhuharov; L. Litov; B. Pavlov; P. Petkov; J.G. Bian; G.M. Chen; H.S. Chen; C.H. Jiang; D. Liang; S. Liang; X. Meng; J. Tao; J. Wang; J. Wang; X. Wang; Z. Wang; H. Xiao; M. Xu; J. Zang; Z. Zhang; C. Asawatangtrakuldee; Y. Ban; S. Guo; Y. Guo; W. Li; S. Liu; Y. Mao; S.J. Qian; H. Teng; S. Wang; B. Zhu; W. Zou; A. Cabrera; B. Gomez Moreno; A.F. Osorio Oliveros; J.C. Sanabria; N. Godinovic; D. Lelas; R. Plestina; D. Polic; I. Puljak; Z. Antunovic; M. Dzelalija; M. Kovac; V. Brigljevic; S. Duric; K. Kadija; J. Luetic; S. Morovic; A. Attikis; M. Galanti; J. Mousa; C. Nicolaou; F. Ptochos; P.A. Razis; M. Finger; M. Finger Jr.; Y. Assran; A. Ellithi Kamel; S. Khalil; M.A. Mahmoud; A. Radi; A. Hektor; M. Kadastik; M. Müntel; M. Raidal; L. Rebane; A. Tiko; V. Azzolini; P. Eerola; G. Fedi; M. Voutilainen; S. Czellar; J. Härkönen; A. Heikkinen; V. Karimäki; R. Kinnunen; M.J. Kortelainen; T. Lampén; K. Lassila-Perini; S. Lehti; T. Lindén; P. Luukka; T. Mäenpää; T. Peltola; E. Tuominen; J. Tuominiemi; E. Tuovinen; D. Ungaro; L. Wendland; K. Banzuzi; A. Korpela; T. Tuuva; D. Sillou; M. Besancon; S. Choudhury; M. Dejardin; D. Denegri; B. Fabbro; J.L. Faure; F. Ferri; S. Ganjour; A. Givernaud; P. Gras; G. Hamel de Monchenault; P. Jarry; E. Locci; J. Malcles; L. Millischer; J. Rander; A. Rosowsky; I. Shreyber; M. Titov; S. Baffioni; F. Beaudette; L. Benhabib; L. Bianchini; M. Bluj; C. Broutin; P. Busson; C. Charlot; N. Daci; T. Dahms; L. Dobrzynski; S. Elgammal; R. Granier de Cassagnac; M. Haguenauer; P. Miné; C. Mironov; C. Ochando; P. Paganini; D. Sabes; R. Salerno; Y. Sirois; C. Thiebaux; C. Veelken; A. Zabi; J.-L. Agram; J. Andrea; D. Bloch; D. Bodin; J.-M. Brom; M. Cardaci; E.C. Chabert; C. Collard; E. Conte; F. Drouhin; C. Ferro; J.-C. Fontaine; D. Gelé; U. Goerlach; P. Juillot; M. Karim; A.-C. Le Bihan; P. Van Hove; F. Fassi; D. Mercier; C. Baty; S. Beauceron; N. Beaupere; M. Bedjidian; O. Bondu; G. Boudoul; D. Boumediene; H. Brun; J. Chasserat; R. Chierici; D. Contardo; P. Depasse; H. El Mamouni; A. Falkiewicz; J. Fay; S. Gascon; M. Gouzevitch; B. Ille; T. Kurca; T. Le Grand; M. Lethuillier; L. Mirabito; S. Perries; V. Sordini; S. Tosi; Y. Tschudi; P. Verdier; S. Viret; D. Lomidze; G. Anagnostou; S. Beranek; M. Edelhoff; L. Feld; N. Heracleous; O. Hindrichs; R. Jussen; K. Klein; J. Merz; A. Ostapchuk; A. Perieanu; F. Raupach; J. Sammet; S. Schael; D. Sprenger; H. Weber; B. Wittmer; V. Zhukov; M. Ata; J. Caudron; E. Dietz-Laursonn; M. Erdmann; A. Güth; T. Hebbeker; C. Heidemann; K. Hoepfner; T. Klimkovich; D. Klingebiel; P. Kreuzer; D. Lanske; J. Lingemann; C. Magass; M. Merschmeyer; A. Meyer; M. Olschewski

2012-01-01T23:59:59.000Z

5

Higgs boson: What's next?  

Science Journals Connector (OSTI)

Checking whether we really have found the Higgs boson of the standard model is high on the agenda, as is looking for clues that it is a more exotic version

Jon Butterworth

2013-01-01T23:59:59.000Z

6

The Higgs boson and cosmology  

Science Journals Connector (OSTI)

...and beyond the discovery of the Higgs boson. organised and edited by John...Tejinder Virdee and David Charlton The Higgs boson and cosmology Mikhail Shaposhnikov...and beyond the discovery of the Higgs boson . I will discuss how the Higgs...

2015-01-01T23:59:59.000Z

7

Two years with the Higgs boson  

E-Print Network (OSTI)

Recent results of the Standard Model Higgs boson searches at the ATLAS and CMS experiments at Large Hadron Collider at CERN are presented.

Tsukerman, Ilya; The ATLAS collaboration

2015-01-01T23:59:59.000Z

8

Charged Higgs boson searches at the LHC  

E-Print Network (OSTI)

We present the latest results from searches for singly charged Higgs bosons carried out by the ATLAS and CMS Collaborations at the LHC. Both experiments have searched for production of charged Higgs bosons in pp collisions of up to 20 (5) fb^-

Chakraborty, Dhiman; The ATLAS collaboration

2015-01-01T23:59:59.000Z

9

A Historical Profile of the Higgs Boson  

E-Print Network (OSTI)

D. V. Nanopoulos, Higgs bosons from two gluon annihilationAssociated production of Higgs bosons and Z particles, Phys.Low-energy theorems for Higgs boson couplings to photons,

Ellis, John

2013-01-01T23:59:59.000Z

10

The Higgs boson and cosmology  

Science Journals Connector (OSTI)

...behind and beyond the discovery of the Higgs boson...behind and beyond the discovery of the Higgs boson...baryogenesis and dark matter production...Nature up to these energies, as this would be...fermions. J. High Energy Phys. 0808, 008...Sterile neutrino dark matter as a consequence...

2015-01-01T23:59:59.000Z

11

A Minimally Symmetric Higgs Boson  

E-Print Network (OSTI)

Models addressing the naturalness of a light Higgs boson typically employ symmetries, either bosonic or fermionic, to stabilize the Higgs mass. We consider a setup with the minimal amount of symmetries: four shift symmetries acting on the four components of the Higgs doublet, subject to the constraints of linearly realized SU(2)xU(1) electroweak symmetry. Up to terms that explicitly violate the shift symmetries, the effective lagrangian can be derived, irrespective of the spontaneously broken group G in the ultraviolet, and is universal in all models where the Higgs arises as a pseudo-Nambu-Goldstone boson (PNGB). Very high energy scatterings of vector bosons could provide smoking gun signals of a minimally symmetric Higgs boson.

Ian Low

2014-12-05T23:59:59.000Z

12

A Minimally Symmetric Higgs Boson  

E-Print Network (OSTI)

Models addressing the naturalness of a light Higgs boson typically employ symmetries, either bosonic or fermionic, to stabilize the Higgs mass. We consider a setup with the minimal amount of symmetries: four shift symmetries acting on the four components of the Higgs doublet, subject to the constraints of linearly realized SU(2)xU(1) electroweak symmetry. Up to terms that explicitly violate the shift symmetries, the effective lagrangian can be derived, irrespective of the spontaneously broken group G in the ultraviolet, and is universal in all models where the Higgs arises as a pseudo-Nambu-Goldstone boson (PNGB). Very high energy scatterings of vector bosons could provide smoking gun signals of a minimally symmetric Higgs boson.

Low, Ian

2014-01-01T23:59:59.000Z

13

Gauge Theories on an Interval: Unitarity Without a Higgs Boson  

E-Print Network (OSTI)

breaking without a Higgs boson. Gauge Theories on anscattering amplitude. The Higgs boson is localized at y = ?Rreal scalar ?eld, the Higgs boson. At tree level, the

Csaki, Csaba; Grojean, Christophe; Murayama, Hitoshi; Luigi, Pilo; Terning, John

2004-01-01T23:59:59.000Z

14

Diffractive Higgs boson photoproduction in $?p$ process  

E-Print Network (OSTI)

We explore an alternative process for the diffractive Higgs boson production in peripheral pp collisions arising from Double Pomeron Exchange in photon-proton interaction. We introduce the impact factor formalism in order to enable the gluon ladder exchange in the photon-proton subprocess, and to permit the central Higgs production. The event rate for the diffractive Higgs production in central rapidity is estimated to be about 0.6 pb at Tevatron and LHC energies. This result is higher than predictions from other approaches for diffractive Higgs production, showing that the alternative production process leads to an enhanced signal for the detection of the Higgs boson at hadron colliders. Our results are compared to those obtained from a similar approach proposed by the Durham group. In this way we may examine the future developments in its application to pp and AA collisions.

M. B. Gay Ducati; G. G. Silveira

2008-12-05T23:59:59.000Z

15

Bringing the Higgs Boson to Rest.  

E-Print Network (OSTI)

??Within the Standard Model of particle physics, the Higgs boson can decay to a pair of W bosons which decay leptonically. Despite its relatively large… (more)

van Nieuwkoop, Koos

2013-01-01T23:59:59.000Z

16

Overview of Higgs boson studies at the Tevatron  

E-Print Network (OSTI)

The CDF and D0 experiments at the Tevatron $p\\bar{p}$ Collider collected data between 2002 and 2011, accumulating up to 10 $\\rm{fb^{-1}}$ of data. During that time, an extensive search for the standard model Higgs boson was performed. Combined results from the searches for the standard model Higgs boson with the final dataset are presented together with results on the Higgs boson couplings and spin and parity.

Lidija Zivkovic

2014-09-17T23:59:59.000Z

17

OVERVIEW OF HIGGS BOSON STUDIES AT THE TEVATRON  

SciTech Connect

The CDF and D0 experiments at the Tevatron p¯p Collider collected data between 2002 and 2011, accumulating up to 10 fb?1 of data. During that time, an extensive search for the standard model Higgs boson was performed. Combined results from the searches for the standard model Higgs boson with the final dataset are presented, together with results on the Higgs boson couplings and spin and parity.

Zivkovic, Lidija [Institute of Physics, Zemun, Serbia

2014-05-01T23:59:59.000Z

18

Electroweak corrections to decays involving a charged Higgs boson  

Science Journals Connector (OSTI)

We present complete one-loop radiative corrections to the decay rate of a top quark into a charged Higgs boson and a bottom quark, and for the decay of a charged Higgs boson into leptons. The results are discussed in the framework of the two-Higgs-boson extension of the standard model suggested by supersymmetry. The effect of electroweak corrections after exclusion of universal corrections ?r is found to decrease the partial width of the top quark typically by 5%.

Andrzej Czarnecki

1993-12-01T23:59:59.000Z

19

Higgs Boson Searches with ATLAS  

Science Journals Connector (OSTI)

Strategies of searches for the Higgs boson with the ATLAS detector at the LHC are discussed using data from 2010 and 2011. A summary of the sensitivity of ATLAS to discover a Standard Model (SM) Higgs boson is shown for the following decay channels: H ? ? ? , H ? W W ? l + ? l ? ? ¯ , H ? W W ? l ? q q ¯ , H ? Z Z ( ? ) ? l + l ? l + l ? , H ? Z Z ( ? ) ? l + l ? q q ¯ . Some prospects for the Minimal Supersymmetric extension of the Standard Model (MSSM) Higgs searches in the H ? ? + ? ? channel are also included with as well as search for a generic scalar at low mass in the vicinity of the ? resonance, decaying to a pair of muons. Limits are given at the 95% confidence level (CL) on the production cross section relative to the Standard Model and to the MSSM predictions.

Julia A. Hoffman

2011-01-01T23:59:59.000Z

20

Trilepton Higgs boson signal at hadron colliders  

Science Journals Connector (OSTI)

Most Higgs boson searches pursued at hadron colliders require Yukawa interactions either in the production or the decay of a Higgs boson. We propose a trilepton Higgs boson search based only upon the gauge interactions of the Higgs boson. This strategy can be utilized successfully for the standard model (SM) Higgs boson as well as nonstandard Higgs bosons which break electroweak symmetry but have little to do with fermion mass generation. The trileptons come from Wh production followed by Wh?WWW(*)?3l decays. A SM Higgs trilepton signal would be difficult to detect at the Fermilab Tevatron collider: with 100 fb-1 of data, only a 3? signal above background can be achieved after cuts if 140 GeVHiggs boson mass in the range 140–185 (125–200) GeV. Prospects for a trilepton Higgs boson discovery are greatly improved for models with nonstandard Higgs boson sectors where a Higgs boson couples preferentially to vector bosons rather than to fermions.

Howard Baer and James D. Wells

1998-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Probing Higgs Boson Interactions At Future Colliders.  

E-Print Network (OSTI)

??We present in this thesis a detailed analysis of Higgs boson interactions at future colliders. In particular we examine, in a model independent way, the… (more)

Biswal, Sudhansu Sekhar

2009-01-01T23:59:59.000Z

22

Statistical analysis for Higgs boson searches  

Science Journals Connector (OSTI)

Statistical inference is used to translate the outcome of the searches for a Higgs boson into statements about evidence or exclusion of...

Giovanni Petrucciani

2013-01-01T23:59:59.000Z

23

Search for the Standard Model Higgs Boson Produced in Association with a Z Boson in the Electron-Muon Final State and the Higgs Boson Decaying into Bottom Quarks  

E-Print Network (OSTI)

Vector Boson Reconstruction . . . . . . . . . Higgs Boson4 The Search for the SM Higgs boson in eµb ¯ b final stateHiggs boson. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bartek, Rachel A.

2013-01-01T23:59:59.000Z

24

Search for the Higgs Boson in Fermionic Channels Using the ATLAS Detector  

E-Print Network (OSTI)

Since the discovery of the Higgs boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its properties. Of particular importance is the direct observation of the coupling of the Higgs boson to fermions. This presentation was a review of ATLAS results in the search for the Higgs boson in tau, muon and b-quark pairs.

Hageboeck, S; The ATLAS collaboration

2014-01-01T23:59:59.000Z

25

Higgs boson signatures of MSSM electroweak baryogenesis  

Science Journals Connector (OSTI)

Electroweak baryogenesis in the minimal supersymmetric standard model can account for the cosmological baryon asymmetry, but only within a restricted region of the parameter space. In particular, minimal supersymmetric standard model electroweak baryogenesis requires a mostly right-handed stop that is lighter than the top quark and a standard model-like light Higgs boson. In the present work we investigate the effects of the light stop on Higgs boson production and decay. Relative to the standard model Higgs boson, we find a large enhancement of the Higgs production rate through gluon fusion and a suppression of the Higgs branching fraction into photon pairs. These modifications in the properties of the Higgs boson are directly related to the effect of the light stop on the electroweak phase transition, and are large enough that they can potentially be tested at the Tevatron and the LHC.

Arjun Menon and David E. Morrissey

2009-06-25T23:59:59.000Z

26

Supersymmetric heavy Higgs bosons at the LHC  

Science Journals Connector (OSTI)

The search for heavy Higgs bosons is an essential step in the exploration of the Higgs sector and in probing the supersymmetric parameter space. This paper discusses the constraints on the MA and tan?? parameters derived from the bounds on the different decay channels of the neutral H and A bosons accessible at the LHC, in the framework of the phenomenological minimal supersymmetric extension of the standard model. The implications from the present LHC results and the expected sensitivity of the 14 TeV data are discussed in terms of the coverage of the [MA-tan??] plane. New channels becoming important at 13 and 14 TeV for low values of tan?? are characterized in terms of their kinematics and the reconstruction strategies. The effect of QCD systematics, SUSY loop effects and decays into pairs of SUSY particles on these constraints are discussed in details.

Alexandre Arbey; Marco Battaglia; Farvah Mahmoudi

2013-07-08T23:59:59.000Z

27

LCPHSM2004005 Study of Higgs Boson Pair Production at  

E-Print Network (OSTI)

LC­PHSM­2004­005 March 2004 Study of Higgs Boson Pair Production at Linear Collider K. Desch a , TV for the measurement of the neutral Higgs boson properties within the framework of the MSSM. The process of associated Higgs boson production with subsequent decays of Higgs bosons into b­quark and #­lepton pairs

28

From the Big Bang to the Higgs Boson in Less Than an Hour  

E-Print Network (OSTI)

From the Big Bang to the Higgs Boson in Less Than an Hour Jeffrey D H Higgs boson Gauge bosons (force field quanta) Higgs boson and vacuum expectation value Strong) photon Z boson W bosons H Higgs boson Gauge bosons (force field quanta) Higgs boson and vacuum

Fygenson, Deborah Kuchnir

29

News from LHC: Recent Results on Higgs Physics  

E-Print Network (OSTI)

The ATLAS and CMS experiments at the LHC have measured detailed properties of the SM-like Higgs boson discovered in 2012. Results on Higgs boson mass, width, spin and coupling determinations are presented. The parameters observed are furthermore interpreted in extensions to the Standard Model. Searches for additional Higgs bosons predicted in the general 2 Higgs Doublet Model (2HDM) and the Minimal Supersymmetric Standard Model (MSSM) are reported.

Straessner, A; The ATLAS collaboration

2014-01-01T23:59:59.000Z

30

Higgs boson studies at the Tevatron  

E-Print Network (OSTI)

We combine searches by the CDF and D0 Collaborations for the standard model Higgs boson with mass in the range 90–200??GeV/c(2) produced in the gluon-gluon fusion, WH, ZH, tt-barH, and vector boson fusion processes, and decaying in the H?bb-bar, H...

Baringer, Philip S.; Bean, Alice; Chen, G.; Clutter, Justace Randall; Wilson, Graham Wallace; Aaltonen, T.; Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.

2013-11-27T23:59:59.000Z

31

Associated production of Higgs bosons and Z particles  

Science Journals Connector (OSTI)

We estimate the cross section for Higgs-boson production via bremsstrahlung from intermediate vector bosons produced in pp and p¯p collisions.

S. L. Glashow; D. V. Nanopoulos; A. Yildiz

1978-09-01T23:59:59.000Z

32

Direct Discovery Prospects for the Light CP-odd Higgs Boson of NMSSM Ideal Higgs Scenarios  

E-Print Network (OSTI)

Direct Discovery Prospects for the Light CP-odd Higgs Boson of NMSSM Ideal Higgs Scenarios Jack on the following papers with R. Dermisek: · New constraints on a light CP-odd Higgs boson and related NMSSM Ideal CP-odd Higgs boson at the Tevatron and LHC. Published in Phys.Rev.D81:055001,2010, arXiv:0911

California at Santa Cruz, University of

33

Invisible decays of low mass Higgs bosons in supersymmetric models  

E-Print Network (OSTI)

The discovery of a 126 GeV Higgs like scalar at the LHC along with the non observation of the supersymmetric particles, has in turn lead to constraining various supersymmetric models through the Higgs data. We here consider the case of both MSSM, as well its extension containing an additional chiral singlet superfield, NMSSM. We concentrate on the case where we identify the second lightest Higgs boson as the 126 GeV state discovered at the CERN LHC and consider the invisible decays of the low mass Higgs bosons in both MSSM and NMSSM. We find that in case of the MSSM with universal boundary conditions at the GUT scale, it is not possible to have light neutralinos leading to the decay channel $H\\rightarrow \\tilde{\\chi}_1^0 \\tilde{\\chi}_1^0$. The invisible decay mode is allowed in case of certain $SO(10)$ and $E_6$ grand unified models with large representations and nonuniversal gaugino masses at the GUT scale. In case of the NMSSM, for the parameter space considered it is possible to have the invisible decay channel with universal gaugino masses at the GUT scale. We furthermore consider the most general case, with $M_1$ and $M_2$ as independent parameters for both MSSM and NMSSM. We isolate the regions in parameter space in both cases, where the second lightest Higgs boson has a mass of 126 GeV and then concentrate on the invisible decay of Higgs to lighter neutralinos. The other non-standard decay mode of the Higgs is also considered in detail. The invisible Higgs branching ratio being constrained by the LHC results, we find that in this case with the second lightest Higgs being the 126 GeV state, more data from the LHC is required to constrain the neutralino parameter space, compared to the case when the lightest Higgs boson is the 126 GeV state.

P. N. Pandita; Monalisa Patra

2014-05-28T23:59:59.000Z

34

Beyond the Standard Model Higgs boson searches using the ATLAS Experiment  

E-Print Network (OSTI)

The discovery of a Higgs boson with a mass of about 125 GeV has prompted the question of whether or not this particle is part of a larger and more complex Higgs sector than that envisioned in the Standard Model. In this talk, the current results from the ATLAS experiment on Beyond the Standard Model (BSM) Higgs boson searches are outlined. The results are interpreted in well-motivated BSM Higgs frameworks.

Tsukerman, Ilya; The ATLAS collaboration

2014-01-01T23:59:59.000Z

35

The discovery and measurements of a Higgs boson  

Science Journals Connector (OSTI)

...and beyond the discovery of the Higgs boson. organised and edited by John...discovery and measurements of a Higgs boson F. Gianotti 1 T. S. Virdee 2...and beyond the discovery of the Higgs boson . In July 2012, the ATLAS and...

2015-01-01T23:59:59.000Z

36

Before, behind and beyond the discovery of the Higgs boson  

Science Journals Connector (OSTI)

...and beyond the discovery of the Higgs boson. organised and edited by John...and beyond the discovery of the Higgs boson John Ellis e-mail: john.ellis...and beyond the discovery of the Higgs boson . The announcement on 4 July 2012...

2015-01-01T23:59:59.000Z

37

LCPHSM2001055 Determination of the Higgs boson spin  

E-Print Network (OSTI)

LC­PHSM­2001­055 Determination of the Higgs boson spin with a Linear e + e \\Gamma Collider M of a light Higgs boson is studied at threshold and compared to the expectation of several spin as­ sumptions luminosity of 20 fb \\Gamma1 allow confirmation of the scalar nature of the Higgs Boson. INTRODUCTION

38

BEAM RELATED SYSTEMATICS IN HIGGS BOSON MASS MEASUREMENT  

E-Print Network (OSTI)

BEAM RELATED SYSTEMATICS IN HIGGS BOSON MASS MEASUREMENT A.RASPEREZA DESY, Notkestrasse 85, D-22607 and differential luminosity spectrum measurements and beam energy spread on the precision of the Higgs boson mass such as Higgs boson mass, decay branching fractions and production rate. However, most of these studies did

39

BEAM RELATED SYSTEMATICS IN HIGGS BOSON MASS MEASUREMENT  

E-Print Network (OSTI)

BEAM RELATED SYSTEMATICS IN HIGGS BOSON MASS MEASUREMENT A.RASPEREZA DESY, Notkestrasse 85, D­22607#erential luminosity spectrum measurements and beam energy spread on the precision of the Higgs boson mass measurement possible impact of the beam related systematic errors on the Higgs boson mass measurement is discussed

40

Invisible Decays of Supersymmetric Higgs Bosons  

Science Journals Connector (OSTI)

We study the detection of the complete spectrum of Higgs bosons of the minimal supersymmetric standard model through their decays into chargino (?? i ± ) and neutralinos (?? i o ) for several parametric scenarios. In the minimal supersymmetric model there are two charginos and four neutralinos and the Higgs boson spectrum contains three neutral scalars two CP?even ( h 0 and H 0 with m H 0 >m h 0 ) and one CP?odd ( A 0 with m A 0 as a free parameter); as well as a charged pair (H ± ). An interesting signal comes from the decays of the Higgs bosons into invisible SUSY modes ( h 0 H 0 A 0 ??? 1 o ?? 1 o ) which could be detected at present and future high energy machines.

M. del R. Aparicio Méndez; J. E. Barradas Guevara; O. Félix Beltrán

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

HIGLU and HDECAY: Programs for Higgs boson production at the LHC and Higgs boson decay widths  

Science Journals Connector (OSTI)

The total cross section for neutral Higgs boson production via the gluon fusion mechanism including NLO (two-loop) QCD corrections can be calculated numerically with the program HIGLU within the Standard Model (SM) as well as its minimal supersymmetric extension (MSSM). The program HDECAY determines the decay widths and branching ratios of the Higgs bosons within the SM and the MSSM, including the dominant higher-order corrections. The program is able to calculate the branching ratios of the MSSM Higgs bosons into standard and supersymmetric particles.

Michael Spira

1997-01-01T23:59:59.000Z

42

Recent Higgs results from the ATLAS experiment  

SciTech Connect

This paper presents recent results on the Higgs boson from the ATLAS experiment at the Large Hadron Collider. The Collaboration reports on measurements of the signal strength, couplings, and spin of the Higgs in several decay channels. We find all measurements to be consistent with Standard Model predictions. The Higgs branching fraction to invisible particles is constrained and no evidence of physics beyond the Standard Model is found.

Brendlinger, Kurt [University of Pennsylvania, Department of Physics and Astronomy, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Collaboration: ATLAS Collaboration

2014-06-24T23:59:59.000Z

43

Measurement of the properties of the Higgs boson at ATLAS  

SciTech Connect

An update on the Higgs boson search in the decay channels H???, H?ZZ{sup (*)}?4l, H?WW{sup (*)}?lvlv, H??{sup +}?{sup ?} and H?bb{sup ¯} at the ATLAS detector is presented. Proton-proton collision data recorded by the ATLAS experiment corresponding to an integrated luminosity of up to 25/fb at centre-of-mass energies of 7 and 8 TeV are used for these results. The latest combined and individual channel measurements of the mass, signal strength, spin and parity, coupling constants and Higgs boson production are reported. Results on the measurements of the properties of the Higgs boson are all consistent with the Standard Model.

Bristow, Timothy [SUPA - School of Physics and Astronomy, University of Edinburgh, Edinburgh (United Kingdom); Collaboration: ATLAS Collaboration

2014-03-05T23:59:59.000Z

44

34 th International Conference on High Energy Physics, Philadelphia, 2008 Searches for the Higgs Boson  

E-Print Network (OSTI)

Searches for this Higgs boson are reaching an exciting time. This proceeding reports the progress on Standard Model Higgs boson searches at the Tevatron and the prospects for Higgs boson searches at the Large Hadron Collider. Also reported are the results of non Standard Model searches and prospects at the Tevatron, Large Hadron Collide and B factories. Included in this result are the first limits on the mass of the Standard Model Higgs boson at high masses beyond the kinematic reach of the Large Electron Positron collider.

unknown authors

45

QCD corrections to Higgs-boson decay and jet analysis  

Science Journals Connector (OSTI)

We have calculated, within the framework of an on-shell renormalization scheme, the first-order QCD corrections to the rate of Higgs-boson decay to heavy quarks. Our analytic results are in complete agreement with those of Braaten and Leveille. We have also considered the Sterman-Weinberg jet structure for two- and three-jet decays of the Higgs boson. Here our results differ somewhat from those of Braaten and Leveille so we discuss the origin of this discrepancy; we extend their work by keeping the quark mass in the jet formulation.

Pat Kalyniak; Nita Sinha; Rahul Sinha; John N. Ng

1991-06-01T23:59:59.000Z

46

A search for the standard model Higgs boson produced in association with a W boson.  

E-Print Network (OSTI)

??We present a search for a standard model Higgs boson produced in association with a W boson using data collected with the CDF II detector… (more)

Frank, Martin J., 1983-

2011-01-01T23:59:59.000Z

47

Standard model Higgs boson-inflaton and dark matter  

Science Journals Connector (OSTI)

The standard model Higgs boson can serve as the inflaton field of slow roll inflationary models provided it exhibits a large nonminimal coupling with the gravitational scalar curvature. The Higgs boson self interactions and its couplings with a standard model singlet scalar serving as the source of dark matter are then subject to cosmological constraints. These bounds, which can be more stringent than those arising from vacuum stability and perturbative triviality alone, still allow values for the Higgs boson mass which should be accessible at the LHC. As the Higgs boson coupling to the dark matter strengthens, lower values of the Higgs boson mass consistent with the cosmological data are allowed.

T. E. Clark; Boyang Liu; S. T. Love; T. ter Veldhuis

2009-10-29T23:59:59.000Z

48

Measurement of the Higgs boson mass with the ATLAS detector  

E-Print Network (OSTI)

A summary of the latest results on the combined measurement of the Higgs boson mass in the H-> ZZ->4l and the H ->gamma gamma decay channels with the ATLAS detector is presented. The analysis uses 25 fb-1 of pp collision data recorded by the ATLAS detector at the CERN Large Hadron Collider at centre-of-mass energies of 7 TeV and 8 TeV during 2011 and 2012. The combined measured value of the Higgs boson mass is mH=125.36+- 0.37(stat)+- 0.18(syst) GeV.

Garay Walls, F M; The ATLAS collaboration

2014-01-01T23:59:59.000Z

49

Invisible decays of Higgs bosons in supersymmetric models  

Science Journals Connector (OSTI)

We point out that the dominant decay of the light scalar Higgs boson in a supersymmetric model may be into a pair of the lightest neutralinos (assumed to be the lightest supersymmetric particles), which would result in an invisible final state. Thus, in the search at the Stanford Linear Collider and the CERN collider LEP for a Higgs scalar produced in association with a real or virtual Z boson, it is important not to cut out events with significant missing energy recoiling against the Z.

Kim Griest and Howard E. Haber

1988-02-01T23:59:59.000Z

50

Triple Higgs boson production at the high-energy Photon Linear Collider in the Higgs triplet model  

Science Journals Connector (OSTI)

Besides the SM-like Higgs boson h, the Higgs triplet model (HTM) predicts the existence of charged and doubly charged Higgs bosons ( and ). In this letter, we focus on the study of the triple Higgs production in ?? collisions at the high-energy linear collider: and . We present the production cross-sections and the distributions of the various observables, i.e., the distributions of the energy and the transverse momenta of the SM-like Higgs boson and charged Higgs bosons. Our numerical results show that, with reasonable parameter values, the values of the cross-sections for two processes can reach the level of several tens of fb and hundreds of fb, respectively. Due to the small SM background, the possible signals of and might be detected via these processes in the future high-energy linear-collider experiments.

Jie-Fen Shen; Yan-Ping Bi

2014-01-01T23:59:59.000Z

51

Observing Higgs boson production through its decay into ?-rays: A messenger for dark matter candidates  

Science Journals Connector (OSTI)

Abstract In this Letter, we study the ?-ray signatures subsequent to the production of a Higgs boson in space by dark matter annihilations. We investigate the cases where the Higgs boson is produced at rest or slightly boosted and show that such configurations can produce characteristic bumps in the ?-ray data. These results are relevant in the case of the Standard Model-like Higgs boson provided that the dark matter mass is about 63 GeV, 109 GeV or 126 GeV, but can be generalized to any other Higgs boson masses. Here, we point out that it may be worth looking for a 63 GeV line since it could be the signature of the decay of a Standard Model-like Higgs boson produced in space, as in the case of a di-Higgs final state if m ? ? 126 GeV . We show that one can set generic constraints on the Higgs boson production rates using its decay properties. In particular, using the Fermi-LAT data from the galactic center, we find that the dark matter annihilation cross section into ?+ a Standard Model-like Higgs boson produced at rest or near rest cannot exceed ? ? v ? ? a few 10 ? 25 cm 3 / s or ? ? v ? ? a few 10 ? 27 cm 3 / s respectively, providing us with information on the Higgs coupling to the dark matter particle. We conclude that Higgs bosons can indeed be used as messengers to explore the dark matter mass range.

Nicolás Bernal; Céline Bœhm; Sergio Palomares-Ruiz; Joseph Silk; Takashi Toma

2013-01-01T23:59:59.000Z

52

The Last Piece of the Puzzle: Celebrating the Higgs Boson | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Last Piece of the Puzzle: Celebrating the Higgs Boson The Last Piece of the Puzzle: Celebrating the Higgs Boson The Last Piece of the Puzzle: Celebrating the Higgs Boson July 5, 2012 - 4:07pm Addthis A simulation of the two-photon channel shows what ATLAS sees when the decay of a Higgs boson results in the production of two gamma rays. The blue beads indicate intermediate massive particles, and the bright green rods are the gamma-ray tracks. While the two-photon channel is the least likely Higgs decay, it is easier to observe than others with even noisier backgrounds. | Photo courtesy of Lawrence Livermore National Lab A simulation of the two-photon channel shows what ATLAS sees when the decay of a Higgs boson results in the production of two gamma rays. The blue beads indicate intermediate massive particles, and the bright green rods

53

Unraveling the Higgs Boson Discovery - Rik Yoshida  

ScienceCinema (OSTI)

Argonne physicist Rik Yoshida explains what the Higgs boson is and what its discovery means for physics, the universe, and life. The third of Argonne's "OutLoud" public lecture series, held at the lab on September 27, 2012. Find out when the next one is at http://www.anl.gov/community/outloud

Rik Yoshida

2013-06-06T23:59:59.000Z

54

Combined measurements of the properties of the Higgs boson using the ATLAS detector  

E-Print Network (OSTI)

The combination of the measurements of the Higgs boson from the ATLAS detector will be presented. Firstly, the measurements of the spin and parity CP of the observed boson will be discussed. Secondly, the results for the production of the Higgs boson in different channels through ggF and VBF processes will be presented. Finally, coupling fits are performed to the data and the Standard Model symmetries and mass dependence are tested and discussed. It is concluded that the observed boson is compatible with one Standard Model CP-even Higgs boson.

Kluit, Peter; The ATLAS collaboration

2014-01-01T23:59:59.000Z

55

Stable Higgs Bosons as Cold Dark Matter  

E-Print Network (OSTI)

In a class of the gauge-Higgs unification models the 4D neutral Higgs boson, which is a part of the extra-dimensional component of the gauge fields, becomes absolutely stable as a consequence of the gauge invariance and dynamically generated new parity, serving as a promising candidate for cold dark matter (CDM). We show that the observed relic abundance of cold dark matter is obtained in the SO(5) x U(1) model in the warped space with the Higgs mass around 70 GeV. The Higgs-nucleon scattering cross section is found to be close to the current CDMS II and XENON10 bounds in the direct detection of dark matter.

Yutaka Hosotani; Pyungwon Ko; Minoru Tanaka

2009-08-03T23:59:59.000Z

56

Invisible Higgs in weak bosons associative production with heavy quarks at LHC: probing mass and width  

E-Print Network (OSTI)

New physics coupled to the Higgs boson may hide it in the standard decay channels to be investigated at LHC. We consider the models where new invisible dominant decay modes of the Higgs boson are responsible for this hiding. We propose to study at LHC the weak boson production associated with heavy quarks: our analysis revealed that boson pair invariant mass distribution is sensitive to both mass and width of the invisible Higgs boson, if it is not too far from the weak boson pair threshold. We present tree-level results for the most relevant cases of top quarks and of bottom quarks in Standard Model extensions with large $b$-quark Yukawa coupling. We argue that QCD corrections do not spoil these results allowing for unambiguous extraction of the Higgs boson mass and width from the analysis of large enough amount of data.

E. E. Boos; S. V. Demidov; D. S. Gorbunov

2010-10-26T23:59:59.000Z

57

What if Superluminal Neutrinos Exist but not Higgs Bosons?  

E-Print Network (OSTI)

As 2011 ended, two results stood out which seemed to go against twentieth century ideas. The first was the OPERA superluminal neutrino observation contradicting Special Relativity. The second was lack of a definitive appearance of the Higgs Boson. While both these hopefully will be decided by the end of 2012, we investigate a single mechanism that explains both these anomalies.

Burra G. Sidharth

2012-01-02T23:59:59.000Z

58

Higgs boson in non-minimal models at the LHC  

E-Print Network (OSTI)

While approaching the start of the data taking at the LHC, ATLAS and CMS perform studies involving the Higgs boson within non-minimal models besides Supersymmetric models. Highlights from both experiments are summarized; all results refer to LHC low luminosity conditions of 10^33 cm^-2 s^-1.

Nancy Marinelli

2007-09-14T23:59:59.000Z

59

THE RESUMMED HIGGS BOSON TRANSVERSE MOMENTUM DISTRIBUTION AT THE LHC.  

SciTech Connect

We apply QCD resummation techniques to study the transverse momentum distribution of Higgs bosons produced via gluon-gluon fusion at the LHC. In particular we focus on the joint resummation formalism which resume both threshold and transverse momentum corrections simultaneously. A comparison of results obtained in the joint and the standard recoil resummation frameworks is presented.

KULESZA,A.STERMAN,G.VOGELSANG,W.

2003-12-08T23:59:59.000Z

60

Measuring Higgs boson couplings at the CERN LHC  

Science Journals Connector (OSTI)

For an intermediate mass Higgs boson with SM-like couplings the CERN LHC allows observation of a variety of decay channels in production by gluon fusion and weak boson fusion. Cross section ratios provide measurements of various ratios of Higgs couplings, with accuracies of order 15% for 100 fb-1 of data in each of the two LHC experiments. For Higgs boson masses above 120 GeV, minimal assumptions on the Higgs sector allow for an indirect measurement of the total Higgs boson width with an accuracy of 10 to 20 %, and of the H?WW partial width with an accuracy of about 10%.

D. Zeppenfeld, R. Kinnunen, A. Nikitenko, and E. Richter-Wa?s

2000-06-08T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

A Search for the Higgs Boson Produced in Association with a Vector Boson Using the ATLAS Detector at the LHC  

E-Print Network (OSTI)

A Search for the Higgs Boson Produced in Association with a Vector Boson Using the ATLAS Detector at the LHC

Mercurio, Kevin Michael

62

Selected topics on multi-loop calculations to Higgs boson properties and renormalization group functions  

E-Print Network (OSTI)

We review some results obtained in the context of the Collaborative Research Center/Transregio~9. In particular we discuss three-loop corrections to the Higgs boson mass in the Minimal Supersymmetric Standard Model, higher order corrections to Higgs boson production, and the calculations of renormalization group functions and decoupling constants.

Mihaila, Luminita N

2015-01-01T23:59:59.000Z

63

The LHC Higgs Boson Discovery: Implications for Finite Unified Theories  

E-Print Network (OSTI)

Finite Unified Theories (FUTs) are N = 1 supersymmetric Grand Unified Theories (GUTs) which can be made finite to all-loop orders, based on the principle of reduction of couplings, and therefore are provided with a large predictive power. We confront the predictions of an SU(5) FUT with the top and bottom quark masses and other low-energy experimental constraints, resulting in a relatively heavy SUSY spectrum, naturally consistent with the non-observation of those particles at the LHC. The light Higgs boson mass is automatically predicted in the range compatible with the Higgs discovery at the LHC. Requiring a light Higgs-boson mass in the precise range of M_h = 125.6 +- 2.1 GeV favors the lower part of the allowed spectrum, resulting in clear predictions for the discovery potential at current and future pp, as well as future e+e- colliders.

Heinemeyer, S; Zoupanos, G

2014-01-01T23:59:59.000Z

64

The LHC Higgs Boson Discovery: Implications for Finite Unified Theories  

E-Print Network (OSTI)

Finite Unified Theories (FUTs) are N = 1 supersymmetric Grand Unified Theories (GUTs) which can be made finite to all-loop orders, based on the principle of reduction of couplings, and therefore are provided with a large predictive power. We confront the predictions of an SU(5) FUT with the top and bottom quark masses and other low-energy experimental constraints, resulting in a relatively heavy SUSY spectrum, naturally consistent with the non-observation of those particles at the LHC. The light Higgs boson mass is automatically predicted in the range compatible with the Higgs discovery at the LHC. Requiring a light Higgs-boson mass in the precise range of M_h = 125.6 +- 2.1 GeV favors the lower part of the allowed spectrum, resulting in clear predictions for the discovery potential at current and future pp, as well as future e+e- colliders.

S. Heinemeyer; M. Mondragon; G. Zoupanos

2014-12-18T23:59:59.000Z

65

Combined Analysis of the CP Properties of The Higgs Boson in Effective Higgs Lagrangian  

E-Print Network (OSTI)

CP violation effects of the Higgs stem from not only the CP mixing state but also the CP-violation couplings to electroweak bosons. The two CPV sources are studied based on an effective Higgs Lagrangian. The constraints from unitarity limits for $WW$ and $ZZ$ scatterings are investigated, and require $b_V$ to vanish while keeping the CPV tensor structure $c_V$ free. Five classes are classified in terms of effective parameters at low-energy. The allowed ranges are shown from fitting results to the signal strengths of the Higgs measured by ATLAS and CMS.

Li, Rong

2014-01-01T23:59:59.000Z

66

Higgs boson decays into single photon plus unparticle  

Science Journals Connector (OSTI)

The decay of the standard model Higgs boson into a single photon and a vector unparticle through a one-loop process is studied. For an intermediate-mass Higgs boson, this single photon plus unparticle mode can have a branching ratio comparable with the two-photon discovery mode. The emitted photon has a continuous energy spectrum encoding the nature of the recoil unparticle. It can be measured in precision studies of the Higgs boson after its discovery.

Kingman Cheung; Chong Sheng Li; Tzu-Chiang Yuan

2008-05-16T23:59:59.000Z

67

Monte Carlo Tools for charged Higgs boson production  

E-Print Network (OSTI)

In this short review we discuss two implementations of the charged Higgs boson production process in association with a top quark in Monte Carlo event generators at next-to-leading order in QCD. We introduce the MC@NLO and the POWHEG method of matching next-to-leading order matrix elements with parton showers and compare both methods analyzing the charged Higgs boson production process in association with a top quark. We shortly discuss the case of a light charged Higgs boson where the associated charged Higgs production interferes with the charged Higgs production via t tbar-production and subsequent decay of the top quark.

Kovarik, K

2014-01-01T23:59:59.000Z

68

Monte Carlo Tools for charged Higgs boson production  

E-Print Network (OSTI)

In this short review we discuss two implementations of the charged Higgs boson production process in association with a top quark in Monte Carlo event generators at next-to-leading order in QCD. We introduce the MC@NLO and the POWHEG method of matching next-to-leading order matrix elements with parton showers and compare both methods analyzing the charged Higgs boson production process in association with a top quark. We shortly discuss the case of a light charged Higgs boson where the associated charged Higgs production interferes with the charged Higgs production via t tbar-production and subsequent decay of the top quark.

K. Kovarik

2014-12-18T23:59:59.000Z

69

Single Higgs boson production at the ILC in the left-right twin Higgs model  

E-Print Network (OSTI)

In this work, we analyse three dominant single SM-like Higgs boson production processes in the left-right twin Higgs model (LRTHM): the Higgs-strahlung (HS) process $e^{+}e^{-}\\rightarrow Zh$, the vector boson fusion (VBF) process $e^{+}e^{-}\\rightarrow \

Liu, Yao-Bei

2014-01-01T23:59:59.000Z

70

Cosmological Constraints on the Higgs Boson Mass  

Science Journals Connector (OSTI)

For a robust interpretation of upcoming observations from PLANCK and Large Hadron Collider experiments it is imperative to understand how the inflationary dynamics of a non-minimally coupled Higgs scalar field with gravity may affect the determination of the inflationary observables. We make a full proper analysis of the Wilkinson Microwave Anisotropy Probe, Type Ia supernova distance-redshift relation, and the baryon acoustic oscillations data sets in a context of the non-minimally coupled Higgs inflation field with gravity. For the central value of the top quark pole mass mT = 171.3 GeV, the fit of the inflation model with a non-minimally coupled Higgs scalar field leads to a Higgs boson mass in the range 143.7 GeV ? mH ? 167 GeV (95% CL). We show that the inflation driven by a non-minimally coupled scalar field to the Einstein gravity leads to significant constraints on the scalar spectral index nS and the tensor-to-scalar ratio R when compared with a tensor with similar constraints to form the standard inflation with a minimally coupled scalar field. We also show that an accurate reconstruction of the Higgs potential in terms of inflationary observables requires an improved accuracy of other parameters of the standard model of particle physics such as the top quark mass and the effective QCD coupling constant.

L. A. Popa; A. Caramete

2010-01-01T23:59:59.000Z

71

Higgs boson mass bounds in the presence of a heavy fourth quark family  

E-Print Network (OSTI)

We present Higgs boson mass bounds in a lattice regularization allowing thus for non-perturbative investigations. In particular, we employ a lattice modified chiral invariant Higgs-Yukawa model using the overlap operator. We show results for the upper and lower Higgs boson mass bounds in the presence of a heavy mass-degenerate quark doublet with masses ranging up to 700 GeV. We perform infinite volume extrapolations in most cases, and examine several values of the lattice cutoff. Furthermore, we argue that the lower Higgs boson mass bound is stable with respect to the addition of higher dimensional operators to the scalar field potential. Our results have severe consequences for the phenomenology of a fourth generation of quarks if a light Higgs boson is discovered at the LHC.

John Bulava; Philipp Gerhold; Karl Jansen; Jim Kallarackal; Attila Nagy

2013-01-16T23:59:59.000Z

72

Search for the Higgs Boson in the All-Hadronic Final State Using the CDF II Detector.  

E-Print Network (OSTI)

??This thesis reports the result of a search for the Standard Model Higgs boson in events containing four reconstructed jets associated with quarks. For masses… (more)

Devoto, Francesco

2013-01-01T23:59:59.000Z

73

From the Big Bang to the Higgs Boson in Less Than an Hour  

E-Print Network (OSTI)

From the Big Bang to the Higgs Boson in Less Than an Hour Jeffrey D neutrino Z0 W + W -g gluon (8) photon Z boson W bosons Quarks Leptons H Higgs boson Gauge bosons (force field quanta) Higgs boson and vacuum expectation value Strong force EM force Weak force #12;Par7cles

Fygenson, Deborah Kuchnir

74

Overcoming a critical background to Higgs-boson detection  

Science Journals Connector (OSTI)

We show that it may well be possible to overcome the jjW background to Higgs-boson detection in mixed hadronic-leptonic final decay channels, while maintaining substantial event rates, even for Higgs-boson masses as high as 1 TeV.

J. F. Gunion and M. Soldate

1986-08-01T23:59:59.000Z

75

The Higgs Boson: Is the End in Sight?  

Science Journals Connector (OSTI)

This summer perhaps while you were lounging around the pool in the blistering heat the blogosphere was buzzing about data taken at the Large Hadron Collider1 at CERN. The buzz reached a crescendo in the first week of July when both Fermilab and CERN announced the results of their searches for the Higgs boson. Hard data confronted a theory nearly half a century old and the theory survived.

Don Lincoln

2012-01-01T23:59:59.000Z

76

Maximum Entropy Principle and the Higgs boson mass  

Science Journals Connector (OSTI)

Abstract A successful connection between Higgs boson decays and the Maximum Entropy Principle is presented. Based on the information theory inference approach we determine the Higgs boson mass as M H = 125.04 ± 0.25 GeV , a value fully compatible to the LHC measurement. This is straightforwardly obtained by taking the Higgs boson branching ratios as the target probability distributions of the inference, without any extra assumptions beyond the Standard Model. Yet, the principle can be a powerful tool in the construction of any model affecting the Higgs sector. We give, as an example, the case where the Higgs boson has an extra invisible decay channel within a Higgs portal model.

Alexandre Alves; Alex G. Dias; Roberto da Silva

2014-01-01T23:59:59.000Z

77

Higgs Boson Decays to Leptons with the ATLAS Detector  

E-Print Network (OSTI)

A review of the results on Higgs boson decays to leptons with the ATLAS detector is presented. In the Htautau search, using the 8 TeV dataset, there is an excess of data over the background prediction, with an observed (expected) significance corresponding to 4.1$\\sigma$ (3.2$\\sigma$). In the Hmumu search, using approximately 25 fb$^{-1}$ of $pp$ collision data collected at 7 TeV and 8 TeV in 2011 and 2012, the data is consistent with the expected background and a 95\\% confidence level limit of 7.0 times the Standard Model prediction is placed on the signal strength, for a Higgs boson mass of 125.5 \\GeV.

Coniavitis, E; The ATLAS collaboration

2014-01-01T23:59:59.000Z

78

Phenomenology of -factorization for inclusive Higgs boson production at LHC  

Science Journals Connector (OSTI)

Abstract We investigate the inclusive Higgs boson production in proton–proton collisions at high energies in the framework of k T -factorization QCD approach. The attention is focused on the dominant off-shell gluon–gluon fusion subprocess g ? g ? ? H ? ? ? , where the transverse momentum of incoming gluons are taken into account. The transverse momentum dependent (or unintegrated) gluon densities of the proton are determined using the CCFM evolution equation as well as the Kimber–Martin–Ryskin prescription. We study the theoretical uncertainties of our calculations and perform the comparison with the results of traditional pQCD evaluations. Our predictions agree well with the first experimental data taken by the ATLAS Collaboration at the LHC. We argue that further studies of the Higgs boson production are capable of constraining the unintegrated gluon densities of the proton.

A.V. Lipatov; M.A. Malyshev; N.P. Zotov

2014-01-01T23:59:59.000Z

79

Prospects for Higgs boson scenarios beyond the Standard Model  

E-Print Network (OSTI)

The new particle recently discovered at the Large Hadron Collider has properties compatible with those expected for the Standard Model (SM) Higgs boson. However, this does not exclude the possibility that the discovered state is of non-standard origin, as part of an elementary Higgs sector in an extended model, or not at all a fundamental Higgs scalar. We review briefly the motivations for Higgs boson scenarios beyond the SM, discuss the phenomenology of several examples, and summarize the prospects and methods for studying interesting models with non-standard Higgs sectors using current and future data.

Oscar Stål

2014-02-26T23:59:59.000Z

80

Prospects for Higgs boson scenarios beyond the Standard Model  

E-Print Network (OSTI)

The new particle recently discovered at the Large Hadron Collider has properties compatible with those expected for the Standard Model (SM) Higgs boson. However, this does not exclude the possibility that the discovered state is of non-standard origin, as part of an elementary Higgs sector in an extended model, or not at all a fundamental Higgs scalar. We review briefly the motivations for Higgs boson scenarios beyond the SM, discuss the phenomenology of several examples, and summarize the prospects and methods for studying interesting models with non-standard Higgs sectors using current and future data.

Stål, Oscar

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Search for the Standard Model Higgs boson decaying to two W bosons at CMS .  

E-Print Network (OSTI)

??In this thesis, we search for the production of the Standard Model Higgs boson at the Large Hadron Collider, through its decay mode to two… (more)

Xie, Si, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

82

Search for the Higgs Boson in the Vector Boson Fusion Channel at the ATLAS Detector.  

E-Print Network (OSTI)

??The search for the Higgs boson has been a cornerstone of the physics program at the Large Hadron Collider in Geneva Switzerland. The ATLAS experiment… (more)

Ouellette, Eric Alexandre

2014-01-01T23:59:59.000Z

83

Charged Higgs Boson: Tracer of the Physics beyond Standard Model  

E-Print Network (OSTI)

Charged Higgs boson can exist in many physics beyond the standard models (BSM) and it is the obvious BSM signal. We briefly describe why the 125GeV scalar discovered at the LHC must have (heavy) companion: the charged Higgs boson, in a new paradigm. We then focus on the charged Higgs phenomenology, especially on how to measure $\\tan\\beta$ precisely utilizing the top quark polarization information.

Zhu, Shou-hua

2014-01-01T23:59:59.000Z

84

Search for standard model Higgs boson production in association with a W boson at CDF  

SciTech Connect

We present a search for the standard model Higgs boson production in association with a $W$ boson in proton-antiproton collisions ($p\\bar{p}\\rightarrow W^\\pm H \\rightarrow \\ell\

Aaltonen, T.; et al.

2012-03-01T23:59:59.000Z

85

CDF/ANAL/EXOTIC/PUBLIC//11103 Tests of the Spin and Parity of the Higgs Boson with CDF  

E-Print Network (OSTI)

CDF/ANAL/EXOTIC/PUBLIC//11103 Tests of the Spin and Parity of the Higgs Boson with CDF The CDF and parity of the Higgs boson using dedicated searches for two specific non-standard Higgs boson hypotheses: a pseudoscalar Higgs boson with JP = 0- and a graviton-like Higgs boson, with JP = 2+, both assuming a boson mass

Quigg, Chris

86

Associated production of Higgs boson with vector boson at threshold N$^3$LO in QCD  

E-Print Network (OSTI)

We present the results for the associated production of Higgs boson with vector boson computed at threshold N$^3$LO in QCD. We use the recently available result on the threshold contributions to the inclusive Drell-Yan production cross-section at third order in strong coupling constant. We have implemented it in the publicly available computer package vh@nnlo, thereby obtaining the numerical impact of threshold N$^3$LO contributions for the first time. We find that the inclusion of such corrections do reduce theoretical uncertainties resulting from the renormalization scale.

Kumar, M C; Ravindran, V

2014-01-01T23:59:59.000Z

87

Fermilab | Science at Fermilab | Fermilab and the Higgs Boson | Large  

NLE Websites -- All DOE Office Websites (Extended Search)

Fermilab and the Higgs Boson Fermilab and the Higgs Boson In this Section: Fermilab and the Higgs Boson Tevatron Experiments: CDF and DZero Large Hadron Collider Experiments: CMS Large Hadron Collider Experiments: CMS On July 4, 2012, scientists on the CMS and ATLAS experiments at the Large Hadron Collider announced the discovery of the Higgs boson. Fermilab was heavily involved in both the construction of the LHC – designing magnets that focus the particle beams into a collision – and the science conducted with the accelerator that led to the Higgs discovery. Scientists from the United States, including 100 Fermilab employees, make up approximately a third of the CMS collaboration, one of the two main experiments operating on the LHC. Fermilab serves as the hub for U.S. researchers working on the international experiment. Fermilab is home to

88

The Higgs boson mixes with an SU(2) septet representation  

E-Print Network (OSTI)

We study a possibility of the Higgs boson, which consists of an SU(2) doublet and a septet. The vacuum expectation value of a septet with hypercharge Y=2 is known to preserve the electroweak rho parameter unity at the tree level. Therefore, the septet can give significant contribution to the electroweak symmetry breaking. Due to the mixing with the septet, the gauge coupling of the standard-model-like Higgs boson is larger than that in the standard model. We show the sizable VEV of the Higgs septet can be allowed under the constraint from the electroweak precision data. The signal strengths of the Higgs boson for the diphoton and a pair of weak gauge boson decay channels at the LHC are enhanced, while those for the fermonic decay modes are suppressed. The mass of additional neutral Higgs boson is also bounded by the current LHC data for the standard model Higgs boson. We discussed the phenomenology of the multiply charged Higgs bosons, which come from the septet.

Junji Hisano; Koji Tsumura

2013-01-28T23:59:59.000Z

89

Discovering the Higgs boson with low mass muon pairs  

Science Journals Connector (OSTI)

Many models of electroweak symmetry breaking have an additional light pseudoscalar. If the Higgs boson can decay to a new pseudoscalar, LEP searches for the Higgs can be significantly altered and the Higgs can be as light as 86 GeV. Discovering the Higgs boson in these models is challenging when the pseudoscalar is lighter than 10 GeV because it decays dominantly into tau leptons. In this paper, we discuss discovering the Higgs in a subdominant decay mode where one of the pseudoscalars decays to a pair of muons. This search allows for potential discovery of a cascade-decaying Higgs boson with the complete Tevatron data set or early data at the LHC.

Mariangela Lisanti and Jay G. Wacker

2009-06-10T23:59:59.000Z

90

Search for the standard model Higgs Boson in the Z gamma channel  

E-Print Network (OSTI)

The Higgs decay into a photon and a Z boson, with the Z boson decaying into an electron-positron pair (electron channel) or muon-antimuon pair (muon channel), allows for accurate reconstructions of the Higgs boson mass and ...

Singh, Kevin

2013-01-01T23:59:59.000Z

91

Search for the Standard Model Higgs boson decaying to two W bosons at CMS  

E-Print Network (OSTI)

In this thesis, we search for the production of the Standard Model Higgs boson at the Large Hadron Collider, through its decay mode to two W bosons, which each in turn decay into a charged lepton and a neutrino. The Higgs ...

Xie, Si, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

92

ATLAS and CMS hints for a mirror Higgs boson  

E-Print Network (OSTI)

ATLAS and CMS have provided hints for the existence of a Higgs-like particle with mass of about 144 GeV with production cross section into standard decay channels which is about 50% that of the standard model Higgs boson. We show that this 50% suppression is exactly what the mirror matter model predicts when the two scalar mass eigenstates, each required to be maximal admixtures of a standard and mirror-Higgs boson, are separated in mass by more than their decay widths but less than the experimental resolution. We discuss prospects for the future confirmation of this interesting hint for non-standard Higgs physics.

Robert Foot; Archil Kobakhidze; Raymond R. Volkas

2011-11-10T23:59:59.000Z

93

ATLAS and CMS hints for a mirror Higgs boson  

Science Journals Connector (OSTI)

ATLAS and CMS have provided hints for the existence of a Higgs-like particle with mass of about 144 GeV with production cross section into standard decay channels which is about 50% that of the standard model Higgs boson. We show that this 50% suppression is exactly what the mirror matter model predicts when the two scalar mass eigenstates, each required to be maximal admixtures of a standard and mirror-Higgs boson, are separated in mass by more than their decay widths but less than the experimental resolution. We discuss prospects for the future confirmation of this interesting hint for nonstandard Higgs physics.

Robert Foot; Archil Kobakhidze; Raymond R. Volkas

2011-11-28T23:59:59.000Z

94

Neutral Higgs Boson Pair Production in Standard Model with the Fourth Generation Quarks at LHC  

Science Journals Connector (OSTI)

We investigated the neutral Higgs boson pair production at the CERN Large Hadron Collider (LHC) in the SM with four families. We found that the gluon-gluon fusion mode is the most dominant one in producing neutral Higgs boson pair at the LHC, and it can be used to probe the trilinear Higgs coupling. If the heavy quarks of the fourth generation really exist within the SM, they can manifest their effect on the cross section of the Higgs pair production process at the LHC. Our numerical results show that there will be neutral Higgs boson pair production events per year if the next generation heavy quarks really exist, while there will be only events produced per year if there are only three families in the SM.

Sun Hao; Ma Wen-Gan; Zhou Ya-Jin; Sun Yan-Bin; Zhang Ren-You; Hou Hong-Sheng

2004-01-01T23:59:59.000Z

95

Search for the associated production of the Higgs boson with a top-quark pair  

E-Print Network (OSTI)

A search for the standard model Higgs boson produced in association with a top-quark pair (t tbar H) is presented, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns and 19.7 inverse femtobarns collected in pp collisions at center-of-mass energies of 7 TeV and 8 TeV respectively. The search is based on the following signatures of the Higgs boson decay: H to hadrons, H to photons, and H to leptons. The results are characterized by an observed t tbar H signal strength relative to the standard model cross section, mu = sigma/sigma[SM], under the assumption that the Higgs boson decays as expected in the standard model. The best fit value is mu = 2.8 +/- 1.0 for a Higgs boson mass of 125.6 GeV.

CMS Collaboration

2014-09-18T23:59:59.000Z

96

Associated production of a top quark and a charged Higgs boson  

Science Journals Connector (OSTI)

We compute the inclusive and differential cross sections for the associated production of a top quark along with a charged Higgs boson at hadron colliders to next-to-leading order (NLO) in perturbative quantum chromodynamics (QCD) and in supersymmetric QCD. For small Higgs boson masses we include top-quark pair production diagrams with subsequent top-quark decay into a bottom quark and a charged Higgs boson. We compare the NLO differential cross sections obtained in the bottom parton picture with those for the gluon-initiated production process and find good agreement. The effects of supersymmetric loop contributions are explored. Only the corrections to the Yukawa coupling are sizable in the potential discovery region at the CERN Large Hadron Collider (LHC). All expressions and numerical results are fully differential, permitting selections on the momenta of both the top quark and the charged Higgs boson.

Edmond L Berger; Tao Han; Jing Jiang; Tilman Plehn

2005-06-28T23:59:59.000Z

97

CP-violating Higgs boson production in association with three jets via gluon fusion  

E-Print Network (OSTI)

In these proceedings, we present results for Higgs production at the LHC via gluon fusion with triple real emission corrections and the validity range of the heavy-top effective theory approximation for this process. For a general CP-violating Higgs boson, we show that bottom-quark loop corrections in combination with large values of $\\tan \\beta $ significantly distort differential distributions.

Campanario, Francisco

2014-01-01T23:59:59.000Z

98

Higgs boson production and decay: Dalitz sector  

Science Journals Connector (OSTI)

Abstract The processes H ? f ¯ f ? ( g ) , p p ? q ¯ + q ? H + ? ( g ) and p p ? q ( q ¯ ) + g ? H + q ( q ¯ ) pose severe challenges to the experimental analysis. They represent rare decays and production mechanisms of the Higgs boson at LHC. However, they are not Yukawa suppressed at next-to-leading order opening a window for the correct definition of pseudo-observables, e.g. a definition of ? ( H ? Z ? ) with universal inherent meaning, that are currently used in extracting information for the couplings of the newly discovered resonance at LHC. The impact of genuinely electroweak NLO corrections is discussed, as well as the comparison of ? ( p p ? g g X ? e + e ? ? ) to its zero-width approximation.

Giampiero Passarino

2013-01-01T23:59:59.000Z

99

Determining the masses of invisible particles: Application to Higgs boson invisible decay  

E-Print Network (OSTI)

To know the total width of the recently discovered Higgs boson particle, it is important to measure the invisible decay width of the Higgs boson. However, the signal for this measurement at the LHC, i.e., a charged lepton pair and missing energy in the final state, cannot be definitely understood as the product of the intermediate produced $Z$ and $H$ bosons due to the possible interaction between dark matter and a $Z$ boson or quarks, which can be described by representative effective operators. First, we consider the relic abundance, the LUX direct detection experiment and the result of searching for Higgs boson invisible decay at the LEP and LHC to find the allowed parameter region for the effective operators. Then we investigate the transverse momentum distribution of the missing energy and propose two observables that can be used to distinguish the different underlying processes. Moreover, with these two observables, we may be able to determine the masses of invisible particles.

Jian Wang

2013-11-14T23:59:59.000Z

100

Science Lecture: Talking the Higgs Boson with Dr. Joseph Incandela |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Science Lecture: Talking the Higgs Boson with Dr. Joseph Incandela Science Lecture: Talking the Higgs Boson with Dr. Joseph Incandela Science Lecture: Talking the Higgs Boson with Dr. Joseph Incandela Addthis Speakers Dr. Joseph Incandela, Steven Chu, Dr. W. F. Brinkman Topic Innovation WILLIAM BRINKMAN: Good morning. I'm Bill Brinkman, I'm the director of the Office of Science, and I'd like to thank all of you for joining us at our third science lecture. These - those of you who are here in the auditorium as well as all of you who are watching online at Germantown, so we hope we have a good audience out there as well as here. I'd especially like to welcome our distinguished guest Joe Incandela and Secretary Steven Chu. You'll hear from Joe and about the - and about the Higgs boson in a few moments. I'm proud of the work that he and so

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Evidence of the Higgs Boson Decaying into Two Photons.  

E-Print Network (OSTI)

??A search for the standard model Higgs boson decaying to two photons will be presented. The analysis will cover 5.1 fb-1 and 19.6 fb-1 of… (more)

Berry, Douglas R

2013-01-01T23:59:59.000Z

102

Standard Model Higgs Boson Searches at the D0 Experiment  

E-Print Network (OSTI)

We present the latest searches for the Standard Model Higgs boson at a centre-of-mass energy of sqrt(s) = 1.96 TeV with the D0 detector at the Fermilab Tevatron collider.

Philip Rich

2009-01-16T23:59:59.000Z

103

Observation and examination of a Higgs boson in the ZZ to four lepton channel  

E-Print Network (OSTI)

Results are presented on 5.1 fb- 1 of proton-proton collisions at a center of mass energy of 7 TeV and 19.7 fb- 1 at 8 TeV in a search for decays of the Standard Model (SM) Higgs boson to two Z bosons to four charged ...

Ralph, Duncan (Duncan Kelley)

2014-01-01T23:59:59.000Z

104

Phase Transitions and Bounds in Higgs-Boson Masses  

Science Journals Connector (OSTI)

Upper bounds on the critical temperature are found in terms of the Higgs-boson mass in SU(N) and SU(2) ? U(1) gauge theories. Also, an upper bound on the Higgs-boson mass as a function of the supercooling ratio is found, provided that quantum tunneling is not sufficient to complete the phase transition from a symmetric phase to a broken phase.

J. J. G. Scanio and P. Suranyi

1981-05-18T23:59:59.000Z

105

Self-interacting dark matter and the Higgs boson  

Science Journals Connector (OSTI)

Self-interacting dark matter has been suggested in order to overcome the difficulties of the cold dark matter model on galactic scales. We argue that a scalar gauge singlet coupled to the Higgs boson, which could lead to an invisibly decaying Higgs boson, is an interesting candidate for this self-interacting dark matter particle. We also present estimates on the abundance of these particles today as well as the consequences to non-Newtonian forces.

M. C. Bento; O. Bertolami; R. Rosenfeld; L. Teodoro

2000-07-25T23:59:59.000Z

106

Search for an Invisibly-Decaying Higgs Boson at LEP  

E-Print Network (OSTI)

A search for a Higgs boson produced in e^+e^- collisions in association with a Z boson and decaying into invisible particles is performed. Data collected at LEP with the L3 detector at centre-of-mass energies from 189 GeV to 209 GeV are used, corresponding to an integrated luminosity of 0.63/fb. Events with hadrons, electrons or muons with visible masses compatible with a Z boson and missing energy and momentum are selected. They are consistent with the Standard Model expectations. A lower limit of 112.3 GeV is set at 95% confidence level on the mass of the invisibly-decaying Higgs boson in the hypothesis that its production cross section equals that of the Standard Model Higgs boson. Relaxing this hypothesis, upper limits on the production cross section are derived.

L3 Collaboration

2005-01-13T23:59:59.000Z

107

A comparison of the Higgs sectors of the CMSSM and NMSSM for a 126 GeV Higgs boson  

Science Journals Connector (OSTI)

Abstract The recent discovery of a Higgs-like boson at the LHC with a mass of 126 GeV has revived the interest in supersymmetric models, which predicted a Higgs boson mass below 130 GeV long before its discovery. We compare systematically the allowed parameter space in the constrained Minimal Supersymmetric Standard Model (CMSSM) and the Next-to-Minimal Supersymmetric Model (NMSSM) by minimizing the ? 2 function with respect to all known constraints from accelerators and cosmology using GUT scale parameters. For the CMSSM the Higgs boson mass at tree level is below the Z 0 boson mass and large radiative corrections are needed to obtain a Higgs boson mass of 126 GeV, which requires stop squark masses in the multi-TeV range. In contrast, for the NMSSM light stop quarks are allowed, since in the NMSSM at tree level the Higgs boson mass can be above the Z 0 boson mass from mixing with the additional singlet Higgs boson. Predictions for the scalar boson masses are given in both models with emphasis on the unique signatures of the NMSSM, where the heaviest scalar Higgs boson decays in the two lighter scalar Higgs bosons with a significant branching ratio, in which case one should observe double Higgs boson production at the LHC. Such a signal is strongly suppressed in the CMSSM. In addition, since the LSP is higgsino-like, Higgs boson decays into \\{LSPs\\} can be appreciable, thus leading to invisible Higgs decays.

C. Beskidt; W. de Boer; D.I. Kazakov

2013-01-01T23:59:59.000Z

108

Before, behind and beyond the discovery of the Higgs boson  

Science Journals Connector (OSTI)

...contributed to this discovery. Their paper also describes...its nature. The Higgs discovery is not only the culmination...may also provide the dark matter postulated by...perhaps driven by energy in space related to...issues posed by the discovery of the Higgs boson will...

2015-01-01T23:59:59.000Z

109

Invisibly decaying Higgs boson in the Littlest Higgs model with T-parity  

E-Print Network (OSTI)

We show that there are regions in the parameter space of the Littlest Higgs model with T-parity, allowed by electroweak precision data, where the Higgs boson can decay invisibly into a pair of heavy photons A_H with a substantial branching ratio. For a symmetry breaking scale f in the range 450-600 GeV, the BR(H -> A_H A_H) can be up to 95% for an intermediate mass Higgs, and from 20% down to a few percents for a Higgs boson of mass 200 GeV or above. The total decay width of the Higgs boson can thereby be enhanced by an order of magnitude compared to the Standard Model for Higgs masses around 130 GeV.

Raghavendra Srikanth Hundi; Biswarup Mukhopadhyaya; Andreas Nyffeler

2007-07-11T23:59:59.000Z

110

Invisibly decaying Higgs boson in the Littlest Higgs model with T?parity  

Science Journals Connector (OSTI)

We show that there are regions in the parameter space of the Littlest Higgs model with T?parity allowed by electroweak precision data where the Higgs boson can decay invisibly into a pair of heavy photons A H with a substantial branching ratio. For a symmetry breaking scale f in the range 450–600 GeV the BR (H?A H A H ) can be up to 95% for an intermediate mass Higgs and from 20% down to a few percents for a Higgs boson of mass 200 GeV or above. The total decay width of the Higgs boson can thereby be enhanced by an order of magnitude compared to the Standard Model for Higgs masses around 130 GeV

R. Srikanth Hundi; B. Mukhopadhyaya; A. Nyffeler

2007-01-01T23:59:59.000Z

111

Search for CP Violating neutral Higgs bosons in the MSSM at LEP  

E-Print Network (OSTI)

The LEP collaborations ALEPH, DELPHI, L3 and OPAL have searched for the neutral Higgs bosons which are predicted within the framework of the Minimal Supersymmetric Standard Model (MSSM). The data of the four collaborations are statistically combined and show no signicant excess of events which would indicate the production of Higgs bosons. The search results are thus used to set upper bounds on the cross sections of various Higgs-like event topologies and limits on MSSM benchmark models, including CP-conserving and CP-violating scenarios. Here, the limits on the model parameters of the CP-violating benchmark scenario CPX and derivates of this scenario are shown.

Philip Bechtle

2006-02-24T23:59:59.000Z

112

About the role of the Higgs boson in the early Fred Jegerlehner, DESY Zeuthen/Humboldt University Berlin  

E-Print Network (OSTI)

About the role of the Higgs boson in the early universe Fred Jegerlehner, DESY Zeuthen ­ April 16-17, 2014 5 #12;The Higgs is special! � the Higgs boson was invented 1964 by Higgs, Englert

Röder, Beate

113

Decay of Z into two light Higgs bosons  

Science Journals Connector (OSTI)

If the standard electroweak gauge model is extended to include two or more Higgs doublets, there may be a neutral Higgs boson h which is light (with a mass of say 10 GeV) but the hZZ coupling is suppressed so that it has so far escaped experimental detection. However, the effective hhZZ coupling is generally unsuppressed; hence, the decay of Z into two light Higgs bosons plus a fermion-antifermion pair may have an observable branching fraction, especially if h decays invisibly as, for example, in the recently proposed doublet Majoron model.

T. V. Duong; E. Keith; Ernest Ma; Hisashi Kikuchi

1995-11-01T23:59:59.000Z

114

Hints for a nonstandard Higgs boson from the LHC  

Science Journals Connector (OSTI)

We reconsider Higgs boson invisible decays into Dark Matter in the light of recent Higgs searches at the LHC. Present hints in the Compact Muon Solenoid and ATLAS data favor a nonstandard Higgs boson with approximately 50% invisible branching ratio, and mass around 143 GeV. This situation can be realized within the simplest thermal scalar singlet Dark Matter model, predicting a Dark Matter mass around 50 GeV and direct detection cross section just below present bound. The present runs of the Xenon100 and LHC experiments can test this possibility.

Martti Raidal and Alessandro Strumia

2011-10-21T23:59:59.000Z

115

Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states  

Science Journals Connector (OSTI)

Abstract Results are reported from a search for non-standard-model Higgs boson decays to pairs of new light bosons, each of which decays into the ? + ? ? final state. The new bosons may be produced either promptly or via a decay chain. The data set corresponds to an integrated luminosity of 5.3 fb ? 1 of proton–proton collisions at s = 7 TeV , recorded by the CMS experiment at the LHC in 2011. Such Higgs boson decays are predicted in several scenarios of new physics, including supersymmetric models with extended Higgs sectors or hidden valleys. Thus, the results of the search are relevant for establishing whether the new particle observed in Higgs boson searches at the LHC has the properties expected for a standard model Higgs boson. No excess of events is observed with respect to the yields expected from standard model processes. A model-independent upper limit of 0.86 ± 0.06 fb on the product of the cross section times branching fraction times acceptance is obtained. The results, which are applicable to a broad spectrum of new physics scenarios, are compared with the predictions of two benchmark models as functions of a Higgs boson mass larger than 86 GeV / c 2 and of a new light boson mass within the range 0.25–3.55 GeV / c 2 .

2013-01-01T23:59:59.000Z

116

Citation: K. Nakamura et al. (Particle Data Group), JPG 37, 075021 (2010) (URL: http://pdg.lbl.gov) Higgs Bosons --H0  

E-Print Network (OSTI)

://pdg.lbl.gov) Higgs Bosons -- H0 and H± , Searches for A REVIEW GOES HERE ­ Check our WWW List of Reviews STANDARD MODEL H0 (Higgs Boson) MASS LIMITSSTANDARD MODEL H0 (Higgs Boson) MASS LIMITSSTANDARD MODEL H0 (Higgs Boson) MASS LIMITSSTANDARD MODEL H0 (Higgs Boson) MASS LIMITS These limits apply to the Higgs boson

117

Search for the Standard Model Higgs Boson in Associated Production with W Boson at the Tevatron.  

E-Print Network (OSTI)

??A search for the Standard Model Higgs boson in proton-antiproton collisions with center-of-mass energy 1.96 TeV at the Tevatron is presented in this dissertation. The… (more)

Xu, Chun

2010-01-01T23:59:59.000Z

118

Effective gauge theory and the effect of heavy quarks in Higgs boson decays  

Science Journals Connector (OSTI)

A general framework is given for evaluating the contributions of as yet undiscovered heavy quarks to the gluonic decay rate of the Weinberg-Salam type Higgs boson. Since the Yukawa coupling of the Higgs boson ...

Takeo Inami; Takahiro Kubota; Yasuhiro Okada

1983-01-01T23:59:59.000Z

119

Invisible Higgs boson decay into massive neutrinos of 4th generation  

E-Print Network (OSTI)

sufficiently stable the existence of such a neutrino leads to the drastic change of Higgs boson physics: for a

K. Belotsky; D. Fargion; M. Khlopov; R. Konoplich; K. Shibaev

120

Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP  

E-Print Network (OSTI)

This paper describes a topological search for an invisibly decaying Higgs boson,H, produced via the Bjorken process (e+e- -> HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and Standard Model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07pb Mh = 60GeV) to 0.57pb (Mh = 114GeV). For decay widths above 200GeV the upper limits are of the order of 0.15pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP2.

The OPAL collaboration

2006-10-18T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

CDF Note 9674 Combined Upper Limit on Standard Model Higgs Boson Production for Winter 2009  

E-Print Network (OSTI)

CDF Note 9674 Combined Upper Limit on Standard Model Higgs Boson Production for Winter 2009 The CDF of searches for the Standard Model Higgs boson at CDF. The six major analyses combined are the WH bV/c2 in steps of 5 GeV/c2 , assuming Standard Model decay branching fractions of the Higgs boson

Fermilab

122

CDF note 9642 Search for the Standard Model Higgs boson in the ET plus jets sample  

E-Print Network (OSTI)

CDF note 9642 Search for the Standard Model Higgs boson in the ET plus jets sample The CDF Collaboration URL http://www-cdf.fnal.gov (Dated: August 17, 2009) We search for the Higgs boson produced; the Higgs boson decays into a bb pair. This analysis is an update of the previous one to 3.6 fb-1 of CDF

Fermilab

123

Present status and future prospects for a Higgs boson discovery at the Tevatron and LHC  

E-Print Network (OSTI)

Present status and future prospects for a Higgs boson discovery at the Tevatron and LHC Howard E-mail: haber@scipp.ucsc.edu Abstract. Discovering the Higgs boson is one of the primary goals of both for the Higgs boson and its phenomenological consequences are examined. 1. Introduction The origin

California at Santa Cruz, University of

124

CDF/PUB/EXOTIC/PUBLIC/10737 Search for a Standard Model Higgs Boson Decaying Into Photons  

E-Print Network (OSTI)

CDF/PUB/EXOTIC/PUBLIC/10737 Search for a Standard Model Higgs Boson Decaying Into Photons at CDF) A search for the SM Higgs boson in the diphoton decay channel is reported using data corre- sponding are set on the production cross section times the H branching fraction for hypothetical Higgs boson

Fermilab

125

The discovery and measurements of a Higgs boson  

Science Journals Connector (OSTI)

The discovery of a Higgs-like boson with a mass of approximately 125 GeV by the ATLAS and CMS experiments at the Large Hadron Collider was announced at CERN on 4 July 2012. The data-set of 5 fb?1 of proton–proton collisions with collected during 2011 and 6 fb?1 with collected in 2012 up to the July discovery was supplemented by an additional 15 fb?1 of data with collected during the rest of 2012. The measurements of the properties of the new boson with the combined data-set have substantially strengthened the evidence that this new particle is indeed the Higgs boson predicted to exist as a consequence of the Brout–Englert–Higgs-mechanism that takes responsibility for generating masses of fundamental particles and for the electroweak symmetry breaking.

A L Read

2013-01-01T23:59:59.000Z

126

Left-Right Symmetry and the Charged Higgs Bosons at the LHC  

E-Print Network (OSTI)

The charged Higgs boson sector of the Minimal Manifest Left-Right Symmetric model (MLRSM) is investigated in the context of LHC discovery search for new physics beyond Standard Model. We discuss and summarise the main processes within MLRSM where heavy charged Higgs bosons can be produced at the LHC. We explore the scenarios where the amplified signals due to relatively light charged scalars dominate against heavy neutral $Z_2$ and charged gauge $W_2$ as well as heavy neutral Higgs bosons signals which are dumped due to large vacuum expectation value $v_R$ of the right-handed scalar triplet. In particular, production processes with one and two doubly charged Higgs bosons are considered. We further incorporate the decays of those scalars leading to multi lepton signals at the LHC. Branching ratios for heavy neutrino $N_R$, $W_2$ and $Z_2$ decay into charged Higgs bosons are calculated. These effects are substantial enough and cannot be neglected. The tri- and four-lepton final states for different benchmark points are analysed. Kinematic cuts are chosen in order to strength the leptonic signals and decrease the Standard Model (SM) background. The results are presented using di-lepton invariant mass and lepton-lepton separation distributions for the same sign (SSDL) and opposite sign (OSDL) di-leptons as well as the charge asymmetry are also discussed. We have found that for considered MLRSM processes tri-lepton and four-lepton signals are most important for their detection when compared to the SM background. Both of the signals can be detected at 14 TeV collisions at the LHC with integrated luminosity at the level of $300 fb^{-1}$ with doubly charged Higgs bosons up to approximately 600 GeV. Finally, possible extra contribution of the charged MLRSM scalar particles to the measured Higgs to di-photon ($H_0^0 \\to \\gamma \\gamma$) decay is computed and pointed out.

G. Bambhaniya; J. Chakrabortty; J. Gluza; M. Kordiaczynska; R. Szafron

2014-04-15T23:59:59.000Z

127

Search for Neutral Minimal Supersymmetric Standard Model Higgs Bosons Decaying to Tau Pairs in pp Collisions at sqrt[s]=7??TeV  

SciTech Connect

A search for neutral MSSM Higgs bosons in pp collisions at the LHC at a center-of-mass energy of 7 TeV is presented. The results are based on a data sample corresponding to an integrated luminosity of 36 inverse picobarns recorded by the CMS experiment. The search uses decays of the Higgs bosons to tau pairs. No excess is observed in the tau-pair invariant-mass spectrum. The resulting upper limits on the Higgs boson production cross section times branching fraction to tau pairs, as a function of the pseudoscalar Higgs boson mass, yield stringent new bounds in the MSSM parameter space.

Chatrchyan, Serguei; et al.

2011-06-01T23:59:59.000Z

128

SciTech Connect: "higgs boson"  

Office of Scientific and Technical Information (OSTI)

higgs boson" Find higgs boson" Find How should I search Scitech Connect ... Basic or Advanced? Basic Search Advanced × Advanced Search Options Full Text: Bibliographic Data: Creator / Author: Name Name ORCID Title: Subject: Identifier Numbers: Research Org.: Sponsoring Org.: Site: All Alaska Power Administration, Juneau, Alaska (United States) Albany Research Center (ARC), Albany, OR (United States) Albuquerque Complex - NNSA Albuquerque Operations Office, Albuquerque, NM (United States) Amarillo National Resource Center for Plutonium, Amarillo, TX (United States) Ames Laboratory (AMES), Ames, IA (United States) Argonne National Laboratory (ANL), Argonne, IL (United States) Argonne National Laboratory-Advanced Photon Source (United States) Atlanta Regional Office, Atlanta, GA (United States) Atmospheric Radiation Measurement (ARM)

129

Combination of Tevatron searches for the standard model Higgs boson in the W+W- decay mode  

SciTech Connect

We combine searches by the CDF and D0 collaborations for a Higgs boson decaying to W{sup +}W{sup -}. The data correspond to an integrated total luminosity of 4.8 (CDF) and 5.4 (D0) fb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron collider. No excess is observed above background expectation, and resulting limits on Higgs boson production exclude a standard-model Higgs boson in the mass range 162-166 GeV at the 95% C.L.

Aaltonen, T.; Abazov, V.M.; Gregores, E.M.; Mercadante, P.G.; /ABC Federal U.; Hebbeker, T.; Kirsch, M.; Meyer, A.; Sonnenschein, L.; /Aachen, Tech. Hochsch.; Avila, C.; Gomez, B.; Mendoza, L.; /Andes U., Bogota /Argonne /Arizona U. /Athens U. /Barcelona, IFAE /Baylor U. /Bonn U. /Boston U. /Brandeis U.

2010-01-01T23:59:59.000Z

130

Higgs boson gluon–fusion production at threshold in N3LO QCD  

Science Journals Connector (OSTI)

Abstract We present the cross-section for the threshold production of the Higgs boson at hadron-colliders at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD. We present an analytic expression for the partonic cross-section at threshold and the impact of these corrections on the numerical estimates for the hadronic cross-section at the LHC. With this result we achieve a major milestone towards a complete evaluation of the cross-section at N3LO which will reduce the theoretical uncertainty in the determination of the strengths of the Higgs boson interactions.

Charalampos Anastasiou; Claude Duhr; Falko Dulat; Elisabetta Furlan; Thomas Gehrmann; Franz Herzog; Bernhard Mistlberger

2014-01-01T23:59:59.000Z

131

Search for the standard model Higgs boson produced in association with W and Z bosons in pp collisions at sqrt(s) = 7 TeV  

E-Print Network (OSTI)

A search for the Higgs boson produced in association with a W or Z boson in proton-proton collisions at a center-of-mass energy of 7 TeV is performed with the CMS detector at the LHC using the full 2011 data sample, from an integrated luminosity of 5 inverse femtobarns. Higgs boson decay modes to tau tau and WW are explored by selecting events with three or four leptons in the final state. No excess above background expectations is observed, resulting in exclusion limits on the product of Higgs associated production cross section and decay branching fraction for Higgs boson masses between 110 and 200 GeV in these channels. Combining these results with other CMS associated production searches using the same dataset in the H to gamma gamma and H to b b-bar decay modes, the cross section for associated Higgs boson production 3.3 times the standard model expectation or larger is ruled out at the 95% confidence level for a Higgs boson mass of 125 GeV.

CMS Collaboration

2013-01-29T23:59:59.000Z

132

Higgs Gravitational Interaction, Weak Boson Scattering, and Higgs Inflation in Jordan and Einstein Frames  

E-Print Network (OSTI)

We study gravitational interaction of Higgs boson through the unique dimension-4 operator $\\xi H^\\dag H R$, with $H$ the Higgs doublet and $R$ the Ricci scalar curvature. We analyze the effect of this dimensionless nonminimal coupling $\\xi$ on weak gauge boson scattering in both Jordan and Einstein frames. We explicitly establish the longitudinal-Goldstone boson equivalence theorem with nonzero $\\xi$ coupling in both frames, and analyze the unitarity constraints. We study the $\\xi$-induced weak boson scattering cross sections at O(1-30)TeV scales, and propose to probe the Higgs-gravity coupling via weak boson scattering experiments at the LHC(14TeV) and the next generation pp colliders (50-100TeV). We further extend our study to Higgs inflation, and quantitatively derive the perturbative unitarity bounds via coupled channel analysis, under large field background at the inflation scale. We analyze the unitarity constraints on the parameter space in both the conventional Higgs inflation and the improved models in light of the recent BICEP2 data.

Jing Ren; Zhong-Zhi Xianyu; Hong-Jian He

2014-04-17T23:59:59.000Z

133

Higgs boson physics and broken flavor symmetry -- LHC phenomenology  

E-Print Network (OSTI)

The LHC implications are presented of a simplified model of broken flavor symmetry in which a new scalar (a flavon) emerges with mass in the TeV range. We summarize the influence of the model on Higgs boson physics, notably on the production cross section and decay branching fractions. Limits are obtained on the flavon $\\varphi$ from heavy Higgs boson searches at the LHC at 7 and 8 TeV. The branching fractions of the flavon are computed as a function of the flavon mass and the Higgs-flavon mixing angle. We explore possible discovery of the flavon at 14 TeV, particularly via the $\\varphi \\rightarrow Z^0Z^0$ decay channel in the $2\\ell2\\ell'$ final state, and through standard model Higgs boson pair production $\\varphi \\rightarrow hh$ in the $b\\bar{b}\\gamma\\gamma$ final state. The flavon mass range up to $500$ GeV could probed down to quite small values of the Higgs-flavon mixing angle with 100 fb$^{-1}$ of integrated luminosity at 14 TeV.

Berger, Edmond L

2014-01-01T23:59:59.000Z

134

The discovery and measurements of a Higgs boson  

Science Journals Connector (OSTI)

...candidate for dark matter in the...physics at the TeV energy scale as the SM...would also allow discovery of whatever else...diverges with energy, becoming unphysical...Summary The discovery of a Higgs boson...of the high-energy physics community...the identity of dark matter, the source...

2015-01-01T23:59:59.000Z

135

A Search for Neutral Supersymmetric Higgs Bosons at D0  

SciTech Connect

A search for Higgs bosons in multijet data from the D0 detector is reported in this thesis. The Higgs boson is the only remaining undiscovered particle in the Standard Model of particle physics, and plays an integral role in this model. It is known that this model is not a complete description of fundamental physics (it does not describe gravity, for example), and so searches for physics beyond the Standard Model are an important part of particle physics. One extension of the Standard Model, the Minimal Supersymmetric Standard Model (MSSM), predicts the existence of five Higgs bosons, two of which can show an enhanced coupling to bottom quarks. For this reason, a search in the bbb (multijet) channel is a sensitive test of Higgs boson physics. The analysis described in this thesis was conducted over 6.6 fb{sup -1} of data. At the time of writing, the best limits on tan {beta} (a key parameter of the MSSM) in the multijet channel were set by D0. The new analysis described in this thesis included more data than the previous analysis in the channel, and made use of a new trigger and event-based analysis method. An improved Multivariate Analysis technique was used to separate signal and background events and produce a final discriminant for the limit setting process. These changes increased the expected sensitivity of this measurement by roughly 50% more than would be expected from the increase in the size of data sample alone.

Osman, Nicolas Ahmed; /Imperial Coll., London

2010-09-01T23:59:59.000Z

136

Search for the Standard Model Higgs boson produced in association with a vector boson and decaying to a b-quark pair with the ATLAS detector  

E-Print Network (OSTI)

This Letter presents the results of a direct search with the ATLAS detector at the LHC for a Standard Model Higgs boson of mass 110?m[subscript H]?130 GeV produced in association with a W or Z boson and decaying to b[bar ...

Taylor, Frank E.

137

Next generation Higgs bosons: Theory, constraints, and discovery prospects at the Large Hadron Collider  

Science Journals Connector (OSTI)

Particle physics model building within the context of string theory suggests that further copies of the Higgs boson sector may be expected. Concerns regarding tree-level flavor-changing neutral currents are easiest to allay if little or no couplings of next generation Higgs bosons to standard model fermions are allowed. We detail the resulting general Higgs potential and mass spectroscopy in both a standard model extension and a supersymmetric extension. We present the important experimental constraints from meson-meson mixing, loop-induced b?s? decays, and LEP2 direct production limits. We investigate the energy range of the valid perturbation theory of these ideas. In the supersymmetric context we present a class of examples that marginally aids the fine-tuning problem for parameter space where the lightest Higgs boson mass is greater than the standard model limit of 114 GeV. Finally, we study collider physics signatures generic to next generation Higgs bosons, with special emphasis on Ah?hhZ?4b+2l signal events, and describe the capability of discovery at the Large Hadron Collider.

Rick S. Gupta and James D. Wells

2010-03-30T23:59:59.000Z

138

Present status and future prospects for a Higgs boson discovery at the Tevatron and LHC  

E-Print Network (OSTI)

Discovering the Higgs boson is one of the primary goals of both the Tevatron and the Large Hadron Collider (LHC). The present status of the Higgs search is reviewed and future prospects for discovery at the Tevatron and LHC are considered. This talk focuses primarily on the Higgs boson of the Standard Model and its minimal supersymmetric extension. Theoretical expectations for the Higgs boson and its phenomenological consequences are reviewed.

Howard E. Haber

2010-11-04T23:59:59.000Z

139

Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS  

E-Print Network (OSTI)

A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the standard model expectation is observed in ...

Taylor, Frank E.

140

Implication on Higgs invisible width in light of the new CDMS result  

E-Print Network (OSTI)

With the assumption that the dominant diagram in supersymmetry for the spin-independent cross section of the dark matter particle is due to Higgs boson exchange, we obtain an upper limit on the Higgs-dark-matter coupling based on the new result of the CDMSII Collaborations. We then obtain an upper limit on the invisible width of the Higgs boson, numerically it is less than 20-120 MeV for $m_h \\simeq 120 - 180$ GeV. Implications for Higgs boson search are also discussed.

Kingman Cheung; Tzu-Chiang Yuan

2009-12-23T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Invisible Higgs boson, continuous mass fields and unHiggs mechanism  

E-Print Network (OSTI)

We explore the consequences of an electroweak symmetry breaking sector which exhibits approximately scale invariant dynamics -- i.e., nontrivial fixed point behavior, as in unparticle models. One can think of an unHiggs as a composite Higgs boson with a continuous mass distribution. We find it convenient to represent the unHiggs in terms of a Kallen-Lehmann spectral function, from which it is simple to verify the generation of gauge boson and fermion masses, and unitarization of WW scattering. We show that a spectral function with broad support, which corresponds to approximate fixed point behavior over an extended range of energy, can lead to an effectively invisible Higgs particle, whose decays at LEP or LHC could be obscured by background.

X. Calmet; N. G. Deshpande; X. G. He; S. D. H. Hsu

2008-10-13T23:59:59.000Z

142

Search for a light charged Higgs boson decaying into $c\\bar{s}$ at CMS  

E-Print Network (OSTI)

We present results on the search for a light charged Higgs boson that can be produced in the decay of a top quark and later decays into a charm and an antistrange quark. The analysis is performed using $19.7\\invfb$ pp collison data recorded with the CMS detector at LHC.

Kole, Gouranga

2014-01-01T23:59:59.000Z

143

H parity and the stable Higgs boson in the SO(5) x U(1) gauge-Higgs unification  

E-Print Network (OSTI)

In the SO(5) x U(1) gauge-Higgs unification model in the Randall-Sundrum warped space there results the conservation of the H parity. The H parity is assigned to all 4D fields including excited modes in Kaluza-Klein towers. The neutral Higgs boson is the lightest particle of odd H parity, consequently becoming absolutely stable. Its mass is found to be 70 \\sim 135 GeV for the warp factor z_L = 10^5 \\sim 10^{15}.

Yutaka Hosotani; Minoru Tanaka; Nobuhiro Uekusa

2010-10-29T23:59:59.000Z

144

Study of diphoton decays of the lightest scalar Higgs boson in the Next-to-Minimal Supersymmetric Standard Model  

Science Journals Connector (OSTI)

The CMS and ATLAS experiments at the LHC have announced the discovery of a Higgs boson with mass at approximately 125 GeV/c2 in the search for the Standard Model Higgs boson via, notably, the ?? and ZZ to four leptons final states. Considering the recent results of the Higgs boson searches from the LHC, we study the lightest scalar Higgs boson h1 in the Next-to-Minimal Supersymmetric Standard Model by restricting the next-to-lightest scalar Higgs boson h2 to be the observed to the 125 GeV/c2 state. We perform a scan over the relevant NMSSM parameter space that is favoured by low fine-tuning considerations. Moreover, we also take the experimental constraints from direct searches, B-physics observables, relic density, and anomalous magnetic moment of the muon measurements, as well as the theoretical considerations, into account in our specific scan. We find that the signal rate in the two-photon final state for the NMSSM Higgs boson h1 with the mass range from about 80 GeV/c2 to about 122 GeV/c2 can be enhanced by a factor of up to 3.5 when the Higgs boson h2 is required to be compatible with the excess from latest LHC results. This motivates the extension of the search at the LHC for the Higgs boson h1 in the diphoton final state down to masses of 80 GeV/c2, particularly with the upcoming proton-proton collision data to be taken at center-of-mass energies of 13–14 TeV.

Fan Jia-Wei (???); Tao Jun-Quan (???); Shen Yu-Qiao (???); Chen Guo-Ming (???); Chen He-Sheng (???); S. Gascon-Shotkin; M. Lethuillier; L. Sgandurra; P. Soulet

2014-01-01T23:59:59.000Z

145

Higgs Boson Spectra in Supersymmetric Left-Right Models  

E-Print Network (OSTI)

We present a comprehensive analysis of the Higgs boson spectra in several versions of the supersymmetric left--right model based on the gauge symmetry $SU(3)_c \\times SU(2)_L \\times SU(2)_R \\times U(1)_{B-L}$. A variety of symmetry breaking sectors are studied, with a focus on the constraints placed on model parameters by the lightest neutral CP even Higgs boson mass $M_h$. The breaking of $SU(2)_R$ symmetry is achieved by Higgs fields transforming either as triplets or doublets, and the electroweak symmetry breaking is triggered by either bi--doublets or doublets. The Higgs potential is analyzed with or without a gauge singlet Higgs field present. Seesaw models of Type I and Type II, inverse seesaw models, universal seesaw models and an $E_6$ inspired alternate left--right model are included in our analysis. Several of these models lead to the tree--level relation $M_h \\leq \\sqrt{2}\\,m_W$ (rather than $M_h \\leq m_Z$ that arises in the MSSM), realized when the $SU(2)_R$ symmetry breaking scale is of order TeV...

Babu, K S

2014-01-01T23:59:59.000Z

146

Evidence for a Higgs boson in tau decays with the CMS detector  

E-Print Network (OSTI)

In this thesis, I describe the search for a Higgs boson through its decay to a pair of tan leptons with the tau-pair subsequently decaying to ail electron, a muon, and neutrinos. The search is performed using data collected from proton-proton collisions by the Compact Muon Solenoid experiment at the Large Hadron Collider, corresponding to 5.0 fb-1 of integrated luminosity recorded at a center-of-mass energy of 7 TeV and 19.7 fb-1 at 8 TeV. The expected significance for a Standard Model Higgs boson signal with a mass of 125 GeV is at the level of 1.2 standard deviations for the electron muon tau-pair decay mode. A mild excess of events is seen above the SM background expectation in this decay mode, consistent with a SM Higgs boson of mass 125 GeV. In combination with results using other tau-pair decay modes, an excess of events above the background expectation is seen at the level of 3.4 standard deviations. This constitutes the first evidence for a Higgs boson to decay to leptons. This thesis also describes a...

Dutta, Valentina

147

CDF note 10798 Seach for the SM Higgs boson in the ET +b-jets signature with relaxed  

E-Print Network (OSTI)

CDF note 10798 Seach for the SM Higgs boson in the ET +b-jets signature with relaxed kinematic cuts) We present a search for the Higgs boson produced in association with a Z or W boson in the ET +b the Higgs boson signal from the remaining background. We check the goodness of our background modeling

Fermilab

148

WATCH LIVE: Talking the Higgs Boson with CERN | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

WATCH LIVE: Talking the Higgs Boson with CERN WATCH LIVE: Talking the Higgs Boson with CERN WATCH LIVE: Talking the Higgs Boson with CERN September 13, 2012 - 2:33pm Addthis WATCH LIVE: Talking the Higgs Boson with CERN Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs Where do I watch? To watch this livestream, go to energy.gov/live. Tune in to a special livestream at energy.gov/live on Friday, Sept. 14 at 10 a.m. ET for a science lecture about the Higgs boson with Joe Incandela, head spokesperson for the CMS experiment at CERN's Large Hadron Collider. Hosted by Secretary of Energy Steven Chu, tune in to the livestream to hear about the research conducted by CERN and the Energy Department. Addthis Related Articles WATCH LIVE: Talking the Higgs Boson with CERN

149

Jefferson Lab Science Series - The Higgs Boson and Our Life  

NLE Websites -- All DOE Office Websites (Extended Search)

Guesstimating the Environment Guesstimating the Environment Previous Video (Guesstimating the Environment) Science Series Video Archive Next Video (The Ultimate Speed) The Ultimate Speed The Higgs Boson and Our Life Dr. Fabiola Gianotti - European Organization for Nuclear Research (CERN) April 30, 2013 On July 4th, 2012, the ATLAS and CMS experiments operating at the CERN Large Hadron Collider (LHC) announced the discovery of a new particle compatible with the Higgs boson (hunted for almost 50 years), which is a crucial piece for our understanding of fundamental physics and thus the structure and evolution of the universe. This lecture describes the unprecedented instruments and challenges that have allowed such an accomplishment, the meaning and relevance of this discovery to physics, and

150

Higgs boson mass and electroweak observables in the MRSSM  

E-Print Network (OSTI)

R-symmetry is a fundamental symmetry which can solve the SUSY flavor problem and relax the search limits on SUSY masses. Here we provide a complete next-to-leading order computation and discussion of the lightest Higgs boson mass, the W boson mass and muon decay in the minimal R-symmetric SUSY model (MRSSM). This model contains non-MSSM particles including a Higgs triplet, Dirac gauginos and higgsinos, and leads to significant new tree-level and one-loop contributions to these observables. We show that the model can accommodate the measured values of the observables for interesting regions of parameter space with stop masses of order 1 TeV in spite of the absence of stop mixing. We characterize these regions and provide typical benchmark points, which are also checked against further experimental constraints. A detailed exposition of the model, its mass matrices and its Feynman rules relevant for computations in this paper is also provided.

Dießner, Philip; Kotlarski, Wojciech; Stöckinger, Dominik

2014-01-01T23:59:59.000Z

151

Diquark Higgs bosons at the CERN LHC  

Science Journals Connector (OSTI)

Existence of color sextet diquark Higgs fields with TeV masses will indicate a fundamentally different direction for unification than conventional grand unified theories. One class of models where they appear naturally is the supersymmetric SU(2)L×SU(2)R×SU(4)c model embedding the seesaw mechanism for neutrino mass with seesaw scale around 1011??GeV. The diquark Higgs fields in this model couple only to up-type quarks. We discuss phenomenological constraints on these fields and show that they could be detected at LHC via their decay to either tt or single top+jet. We also find that existing Tevatron data gives a lower bound on its mass somewhere in the 400–500 GeV, for reasonable values of its coupling.

R. N. Mohapatra; Nobuchika Okada; Hai-Bo Yu

2008-01-14T23:59:59.000Z

152

Search for the Standard Model Higgs Boson at the LEP2 Collider near  

E-Print Network (OSTI)

Search for the Standard Model Higgs Boson at the LEP2 Collider near ps = 183 GeV The ALEPHV. These data are used to look for possible signals from the production of the Standard Model Higgs boson on the mass of the Higgs boson: mH > 87:9 GeV=c2 at 95% con#12;dence level. The ALEPH Collaboration wish

Boyer, Edmond

153

Strategy for discovering a low-mass Higgs boson at the Fermilab Tevatron Pushpalatha C. Bhat  

E-Print Network (OSTI)

Strategy for discovering a low-mass Higgs boson at the Fermilab Tevatron Pushpalatha C. Bhat Fermi-mass standard model Higgs boson, during run II, via the processes pp¯WHl bb¯, pp¯ZH l l bb¯ and pp¯ZH ¯bb¯. We conventional analysis, in the integrated luminosity required to find a standard model Higgs boson in the mass

Bhat, Pushpalatha

154

Ultra-weak sector, Higgs boson mass, and the dilaton  

SciTech Connect

The Higgs boson mass may arise from a portal coupling to a singlet field $\\sigma$ which has a very large VEV $f \\gg m_\\text{Higgs}$. This requires a sector of "ultra-weak" couplings $\\zeta_i$, where $\\zeta_i \\lesssim m_\\text{Higgs}^2 / f^2$. Ultra-weak couplings are technically naturally small due to a custodial shift symmetry of $\\sigma$ in the $\\zeta_i \\rightarrow 0$ limit. The singlet field $\\sigma$ has properties similar to a pseudo-dilaton. We engineer explicit breaking of scale invariance in the ultra-weak sector via a Coleman-Weinberg potential, which requires hierarchies amongst the ultra-weak couplings.

Allison, Kyle [University of Oxford; Hill, Christopher T. [FNAL; Ross, Graham G. [University of Oxford

2014-11-01T23:59:59.000Z

155

Phase structure and Higgs boson mass in a Higgs-Yukawa model with a dimension-6 operator  

E-Print Network (OSTI)

We investigate the impact of a $\\lambda_6 \\varphi^6$ term included in a chirally invariant lattice Higgs-Yukawa model. Such a term could emerge from BSM physics at some larger energy scale. We map out the phase structure of the Higgs-Yukawa model with positive $\\lambda_6$ and negative quartic self coupling of the scalar fields. To this end, we evaluate the constraint effective potential in lattice perturbation theory and also determine the magnetization of the model via numerical simulations which allow us to reach also non-perturbative values of the couplings. As a result, we find a complex phase structure with first and second order phase transitions identified through the magnetization. Further we analyze the effect of such a $\\varphi^6$ term on the lower Higgs boson mass bound to see, whether the standard model lower mass bound can be altered.

Chu, David Y -J; Knippschild, Bastian; Lin, C -J David; Nagai, Kei-Ichi; Nagy, Attila

2015-01-01T23:59:59.000Z

156

Tevatron Constraints on Models of the Higgs Boson with Exotic Spin and Parity Using Decays to Bottom-Antibottom Quark Pairs  

E-Print Network (OSTI)

Combined constraints from the CDF and D0 Collaborations on models of the Higgs boson with exotic spin $J$ and parity $P$ are presented and compared with results obtained assuming the standard model value $J^P=0^+$. Both collaborations analyzed approximately 10~fb$^{-1}$ of proton-antiproton collisions with a center-of-mass energy of 1.96~TeV collected at the Fermilab Tevatron. Two models predicting exotic Higgs bosons with $J^P=0^-$ and $J^P=2^+$ are tested. The kinematic properties of exotic Higgs boson production in association with a vector boson differ from those predicted for the standard model Higgs boson. Upper limits at the 95\\% credibility level on the production rates of the exotic Higgs bosons, expressed as fractions of the standard model Higgs boson production rate, are set at 0.36 for both the $J^P=0^-$ hypothesis and the $J^P=2^+$ hypothesis. If the production rate times the branching ratio to a bottom-antibottom pair is the same as that predicted for the standard model Higgs boson, then the exotic bosons are excluded with significances of 5.0 standard deviations and 4.9 standard deviations for the $J^P=0^-$ and $J^P=2^+$ hypotheses, respectively.

The CDF; D0 Collaborations

2015-02-03T23:59:59.000Z

157

Higgs boson Mass in GMSB with Messenger–Matter mixing  

Science Journals Connector (OSTI)

A Higgs-like particle with mass of order 125 GeV has been observed by both ATLAS and CMS experiments. This Higgs mass causes sparticle masses in the several to multi-TeV range in the simple version of minimal GMSB models. We consider the effects of messenger–matter mixing on the lightest CP–even Higgs boson mass in gauge–mediated supersymmetry breaking models. We find with such mixings a 125 GeV Higgs boson can be naturally obtained even with a sub–TeV SUSY spectrum, and when the gravitino has a cosmologically preferred sub–keV mass. In addition, when these models are embedded into a grand unification framework with a U ( 1 ) flavor symmetry they explain the fermion mass hierarchy and generate naturally large neutrino mixing angles accompanied with small quark mixing angles. While SUSY mediated flavor changing processes are sufficiently suppressed in such an embedding, it can resolve the apparent discrepancy in the CP asymmetry parameters sin 2 ? and ? K , and it predicts an observable ? ? e ? decay rate.

Abdelhamid Albaid

2012-01-01T23:59:59.000Z

158

Higgs boson properties in the Standard Model and its supersymmetric extensions  

Science Journals Connector (OSTI)

We review the realization of the Brout–Englert–Higgs mechanism in the electroweak theory and describe the experimental and theoretical constraints on the mass of the single Higgs boson expected in the minimal Standard Model. We also discuss the couplings of this Higgs boson and its possible decay modes as functions of its unknown mass. We then review the structure of the Higgs sector in the minimal supersymmetric extension of the Standard Model (MSSM), noting the importance of loop corrections to the masses of its five physical Higgs bosons. Finally, we discuss some non-minimal models. To cite this article: J. Ellis et al., C. R. Physique 8 (2007).

John Ellis; Giovanni Ridolfi; Fabio Zwirner

2007-01-01T23:59:59.000Z

159

The search for the Higgs boson in tauon pairs at the ATLAS experiment .  

E-Print Network (OSTI)

??The Higgs boson is a particle that???s predicted to exist by spontaneous electroweak symmetry breaking. Electroweak symmetry breaking is an essential part of the Standard… (more)

Shao, Qi Tao

2013-01-01T23:59:59.000Z

160

A Search for the Standard Model Higgs Boson Produced in Association with Top Quarks.  

E-Print Network (OSTI)

??We have performed a search for the Standard Model Higgs boson produced in association with top quarks in the lepton plus jets channel. We impose… (more)

Wilson, Jonathan S.

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

The Search For The Standard Model Higgs Boson And Investigation Of Its Properties.  

E-Print Network (OSTI)

?? This dissertation presents the search for the standard model Higgs boson and initial measurement of its properties using the Compact Muon Solenoid experiment at… (more)

Bochenek, Joseph

2013-01-01T23:59:59.000Z

162

Associated charged Higgs boson and squark production in the NUHM model.  

E-Print Network (OSTI)

?? Conventional searches for the charged Higgs boson using its production in association with Standard Model (SM) quarks is notoriously weak in the mid-tanB range.… (more)

Lund, Gustav

2010-01-01T23:59:59.000Z

163

Evidence for a Higgs boson in tau decays with the CMS detector .  

E-Print Network (OSTI)

??In this thesis, I describe the search for a Higgs boson through its decay to a pair of tan leptons with the tau-pair subsequently decaying… (more)

Dutta, Valentina

2014-01-01T23:59:59.000Z

164

Search for a Higgs Boson Decaying into Two Photons at LEP  

E-Print Network (OSTI)

A Higgs particle produced in association with a Z boson and decaying into two photons is searched for in the data collected by the L3 experiment at LEP. All possible decay modes of the Z boson are investigated. No signal is observed in 447.5 pb^-1 of data recorded at centre-of-mass energies up to 209 GeV. Limits on the branching fraction of the Higgs boson decay into two photons as a function of the Higgs mass are derived. A lower limit on the mass of a fermiophobic Higgs boson is set at 105.4 GeV at 95% confidence level.

Achard, P; Aguilar-Benítez, M; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alviggi, M G; Anderhub, H; Andreev, V P; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Bajo, A; Baksay, G; Baksay, L; Baldew, S V; Banerjee, S; Banerjee, Sw; Barczyk, A; Barillère, R; Bartalini, P; Basile, M; Batalova, N; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Bellucci, L; Berbeco, R; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Biasini, M; Biglietti, M; Biland, A; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böhm, A; Boldizsar, L; Borgia, B; Bottai, S; Bourilkov, D; Bourquin, Maurice; Braccini, S; Branson, J G; Brochu, F; Burger, J D; Burger, W J; Cai, X D; Capell, M; Cara Romeo, G; Carlino, G; Cartacci, A M; Casaus, J; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Chamizo-Llatas, M; Chang, Y H; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chiefari, G; Cifarelli, Luisa; Cindolo, F; Clare, I; Clare, R; Coignet, G; Colino, N; Costantini, S; de la Cruz, B; Cucciarelli, S; van Dalen, J A; De Asmundis, R; Déglon, P L; Debreczeni, J; Degré, A; Deiters, K; Della Volpe, D; Delmeire, E; Denes, P; De Notaristefani, F; De Salvo, A; Diemoz, M; Dierckxsens, M; Dionisi, C; Dittmar, Michael; Doria, A; Dova, M T; Duchesneau, D; Echenard, B; Eline, A; El-Mamouni, H; Engler, A; Eppling, F J; Ewers, A; Extermann, Pierre; Falagán, M A; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, Marta; Ferguson, T; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, Frank; Fisher, P H; Fisher, W; Fisk, I; Forconi, G; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gataullin, M; Gentile, S; Giagu, S; Gong, Z F; Grenier, G; Grimm, O; Grünewald, M W; Guida, M; van Gulik, R; Gupta, V K; Gurtu, A; Gutay, L J; Haas, D; Hakobyan, R S; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Hirschfelder, J; Hofer, H; Hohlmann, M; Holzner, G; Hou, S R; Hu, Y; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Käfer, D; Kaur, M; Kienzle-Focacci, M N; Kim, J K; Kirkby, Jasper; Kittel, E W; Klimentov, A; König, A C; Kopal, M; Koutsenko, V F; Kräber, M H; Krämer, R W; Krenz, W; Krüger, A; Kunin, A; Ladrón de Guevara, P; Laktineh, I; Landi, G; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Le Goff, J M; Leiste, R; Levtchenko, M; Levchenko, P M; Li, C; Likhoded, S A; Lin, C H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lü, Y S; Lübelsmeyer, K; Luci, C; Luminari, L; Lustermann, W; Ma Wen Gan; Malgeri, L; Malinin, A; Maña, C; Mangeol, D J J; Mans, J; Martin, J P; Marzano, F; Mazumdar, K; McNeil, R R; Mele, S; Merola, L; Meschini, M; Metzger, W J; Mihul, A; Milcent, H; Mirabelli, G; Mnich, J; Mohanty, G B; Muanza, G S; Muijs, A J M; Musicar, B; Musy, M; Nagy, S; Natale, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Niessen, T; Nisati, A; Nowak, H; Ofierzynski, R A; Organtini, G; Palomares, C; Pandoulas, D; Paolucci, P; Paramatti, R; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Pedace, M; Pensotti, S; Perret-Gallix, D; Petersen, B; Piccolo, D; Pierella, F; Pioppi, M; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Pothier, J; Prokofiev, D O; Prokofev, D; Quartieri, J; Rahal-Callot, G; Rahaman, M A; Raics, P; Raja, N; Ramelli, R; Rancoita, P G; Ranieri, R; Raspereza, A V; Razis, P A; Ren, D; Rescigno, M; Reucroft, S; Riemann, S; Riles, K; Roe, B P; Romero, L; Rosca, A; Rosier-Lees, S; Roth, S; Rosenbleck, C; Roux, B; Rubio, Juan Antonio; Ruggiero, G; Rykaczewski, H; Sakharov, A; Saremi, S; Sarkar, S; Salicio, J; Sánchez, E; Sanders, M P; Schäfer, C; Shchegelskii, V; Schmidt-Kärst, S; Schmitz, D; Schopper, Herwig Franz; Schotanus, D J; Schwering, G; Sciacca, C; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shumilov, E; Shvorob, A V; Siedenburg, T; Son, D; Spillantini, P; Steuer, M; Stickland, D P; Stoyanov, B; Strässner, A; Sudhakar, K; Sultanov, G G; Sun, L Z; Sushkov, S V; Suter, H; Swain, J D; Szillási, Z; Tang, X W; Tarjan, P; Tauscher, Ludwig; Taylor, L; Tellili, B; Teyssier, D; Timmermans, C; Ting, Samuel C C; Ting, S M; Tonwar, S C; Tóth, J; Tully, C; Tung, K L; Ulbricht, J; Valente, E; Van de Walle, R T; Veszpremi, V; Vesztergombi, G; Vetlitskii, I; Vicinanza, D; Viertel, Gert M; Villa, S; Vivargent, M; Vlachos, S; Vodopyanov, I; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Wadhwa, M; Wallraff, W; Wang, X L; Wang, Z M; Weber, M; Wienemann, P; Wilkens, H; Wynhoff, S; Xia, L; Xu, Z Z; Yamamoto, J; Yang, B Z; Yang, C G; Yang, H J; Yang, M; Yeh, S C; Zalite, A; Zalite, Yu; Zhang, Z P; Zhao, J; Zhu, G Y; Zhu, R Y; Zhuang, H L; Zichichi, A; Zilizi, G; Zimmermann, B; Zöller, M

2002-01-01T23:59:59.000Z

165

Invisible Higgs boson decay in the littlest Higgs model with T-parity  

E-Print Network (OSTI)

We study the invisible decay of the Higgs boson into a pair of stable, heavy photons, H -> A_H A_H, in the littlest Higgs model with T-parity. For a symmetry breaking scale of f = 450 GeV, the branching ratio H -> A_H A_H can be as high as 93% for Higgs masses below 150 GeV. For f = 500 GeV, the invisible branching ratio is about 75% in the Higgs mass range 135 - 150 GeV and 10 (5.5)% for m_H = 200 (600) GeV. It drops to a few percent for f larger than 600 GeV. We have found regions in parameter space, allowed by the electroweak precision data, with such low values of f for 115 GeV < m_H < 650 GeV.

Raghavendra Srikanth Hundi; Biswarup Mukhopadhyaya; Andreas Nyffeler

2006-11-09T23:59:59.000Z

166

Search for the standard model Higgs Boson in the Z gamma channel .  

E-Print Network (OSTI)

??The Higgs decay into a photon and a Z boson, with the Z boson decaying into an electron-positron pair (electron channel) or muon-antimuon pair (muon… (more)

Singh, Kevin

2013-01-01T23:59:59.000Z

167

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes  

E-Print Network (OSTI)

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b[bar over b] ...

Apyan, Aram

168

The Nambu sum rule and the relation between the masses of composite Higgs bosons  

E-Print Network (OSTI)

We review the known results on the bosonic spectrum in various NJL models both in the condensed matter physics and in relativistic quantum field theory including $^3$He-B, $^3$He-A, the thin films of superfluid He-3, and QCD (Hadronic phase and the Color Flavor Locking phase). Next, we calculate bosonic spectrum in the relativistic model of top quark condensation suggested in \\cite{Miransky}. In all considered cases the sum rule appears that relates the masses (energy gaps) $M_{boson}$ of the bosonic excitations in each channel with the mass (energy gap) of the condensed fermion $M_f$ as $\\sum M_{boson}^2 = 4 M_f^2$. Previously this relation was established by Nambu in \\cite{Nambu} for $^3$He-B and for the s - wave superconductor. We generalize this relation to the wider class of models and call it the Nambu sum rule. We discuss the possibility to apply this sum rule to various models of top quark condensation. In some cases this rule allows to calculate the masses of extra Higgs bosons that are the Nambu partners of the 125 GeV Higgs.

G. E. Volovik; M. A. Zubkov

2013-03-24T23:59:59.000Z

169

Reach of CERN LEP2 and Fermilab Tevatron upgrades for Higgs bosons in supersymmetric models  

Science Journals Connector (OSTI)

Luminosity upgrades of the Fermilab Tevatron pp¯ collider have been shown to allow experimental detection of a standard model (SM) Higgs boson up to mHSM?120 GeV via WHSM?l?bb¯ events. This limit nearly saturates the parameter space for many models of weak scale supersymmetry (SUSY) with a minimal particle content. It is therefore interesting to examine the SUSY Higgs reach of future Tevatron experiments. Contours are presented of Higgs boson reach for CERN LEP2 and Tevatron luminosity upgrades for three models of weak scale SUSY: the minimal supersymmetric standard model, the minimal supergravity model and a simple gauge mediated SUSY breaking model. In each case we find a substantial gain in reach at the Tevatron with integrated luminosity increasing from 10 fb-1 to 25–30 fb-1. With the larger integrated luminosity, a Higgs boson search at the Tevatron should be able to probe essentially the entire parameter space of these models. While a discovery would be very exciting, a negative result would severely constrain our ideas about how weak scale supersymmetry is realized.

Howard Baer, B. W. Harris, and Xerxes Tata

1998-11-19T23:59:59.000Z

170

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes  

SciTech Connect

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b b-bar quark pair. The searches use the 8 TeV pp collision dataset collected by the CMS detector at the LHC, corresponding to an integrated luminosity of up to 19.7 inverse femtobarns. Certain channels include data from 7 TeV collisions corresponding to an integrated luminosity of 4.9 inverse femtobarns. The searches are sensitive to non-standard-model invisible decays of the recently observed Higgs boson, as well as additional Higgs bosons with similar production modes and large invisible branching fractions. In all channels, the observed data are consistent with the expected standard model backgrounds. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass, for the vector boson fusion and ZH production modes. By combining all channels, and assuming standard model Higgs boson cross sections and acceptances, the observed (expected) upper limit on the invisible branching fraction at m[H] = 125 GeV is found to be 0.58 (0.44) at 95% confidence level. We interpret this limit in terms of a Higgs-portal model of dark matter interactions.

Chatrchyan, Serguei; et. al,

2014-08-01T23:59:59.000Z

171

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes  

E-Print Network (OSTI)

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b b-bar quark pair. The searches use the 8 TeV pp collision dataset collected by the CMS detector at the LHC, corresponding to an integrated luminosity of up to 19.7 inverse femtobarns. Certain channels include data from 7 TeV collisions corresponding to an integrated luminosity of 4.9 inverse femtobarns. The searches are sensitive to non-standard-model invisible decays of the recently observed Higgs boson, as well as additional Higgs bosons with similar production modes and large invisible branching fractions. In all channels, the observed data are consistent with the expected standard model backgrounds. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass, for the vector boson fusion and ZH production modes. By combining all channels, and assuming standard model Higgs boson cross sections and acceptances, the observed (expected) upper limit on the invisible branching fraction at m[H] = 125 GeV is found to be 0.58 (0.44) at 95% confidence level. We interpret this limit in terms of a Higgs-portal model of dark matter interactions.

CMS Collaboration

2014-04-04T23:59:59.000Z

172

Tevatron Constraints on Models of the Higgs Boson with Exotic Spin and Parity Using Decays to Bottom-Antibottom Quark Pairs  

E-Print Network (OSTI)

Combined constraints from the CDF and D0 Collaborations on models of the Higgs boson with exotic spin $J$ and parity $P$ are presented and compared with results obtained assuming the standard model value $J^P=0^+$. Both collaborations analyzed approximately 10~fb$^{-1}$ of proton-antiproton collisions with a center-of-mass energy of 1.96~TeV collected at the Fermilab Tevatron. Two models predicting exotic Higgs bosons with $J^P=0^-$ and $J^P=2^+$ are tested. The kinematic properties of exotic Higgs boson production in association with a vector boson differ from those predicted for the standard model Higgs boson. Upper limits at the 95\\% credibility level on the production rates of the exotic Higgs bosons, expressed as fractions of the standard model Higgs boson production rate, are set at 0.36 for both the $J^P=0^-$ hypothesis and the $J^P=2^+$ hypothesis. If the production rate times the branching ratio to a bottom-antibottom pair is the same as that predicted for the standard model Higgs boson, then the exo...

CDF, The

2015-01-01T23:59:59.000Z

173

NATURE PHYSICS | VOL 7 | DECEMBER 2011 | www.nature.com/naturephysics 919 The Higgs boson, as part of the standard  

E-Print Network (OSTI)

NATURE PHYSICS | VOL 7 | DECEMBER 2011 | www.nature.com/naturephysics 919 editorial The Higgs boson. The Higgs boson is running out of places to hide. End of the line? Europe is embroiled in a major crisis

Loss, Daniel

174

Study of the Higgs boson decay H ? ZZ(?) ? 4? and inner detector performance studies with the ATLAS experiment   

E-Print Network (OSTI)

The Higgs mechanism is the last piece of the SM to be discovered which is responsible for giving mass to the electroweak W± and Z bosons. Experimental evidence for the Higgs boson is therefore important and is currently ...

Selbach, Karoline Elfriede

2014-06-28T23:59:59.000Z

175

Search for the Higgs boson in lepton, tau and jets final states  

E-Print Network (OSTI)

We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with two or more jets using 9.7 fb^{-1} of Run II Fermilab Tevatron Collider data collected with the D0 detector. The analysis is sensitive to Higgs boson production via gluon fusion, associated vector boson production, and vector boson fusion, followed by the Higgs boson decay to tau lepton pairs or to W boson pairs. The ratios of 95% C.L. upper limits on the cross section times branching ratio to those predicted by the standard model are obtained for orthogonal subsamples that are enriched in either H -> tau tau decays or H -> WW decays, and for the combination of these subsample limits. The observed and expected limit ratios for the combined subsamples at a Higgs boson mass of 125 GeV are 11.3 and 9.0 respectively.

D0 Collaboration

2012-11-29T23:59:59.000Z

176

Search for the Higgs boson in lepton, tau, and jets final states  

SciTech Connect

We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with two or more jets using 9.7 fb?1 of Run II Fermilab Tevatron Collider data collected with the D0 detector. The analysis is sensitive to Higgs boson production via gluon fusion, associated vector boson production, and vector boson fusion, followed by the Higgs boson decay to tau lepton pairs or to W boson pairs. The ratios of 95% C.L. upper limits on the cross section times branching ratio to those predicted by the standard model are obtained for orthogonal subsamples that are enriched in either H ? ? ? decays or H ? WW decays, and for the combination of these subsample limits. The observed and expected limit ratios for the combined subsamples at a Higgs boson mass of 125 GeV are 11.3 and 9.0 respectively.

Abazov, V.M.; et al.

2013-09-01T23:59:59.000Z

177

Search for the standard model Higgs boson in tau lepton pair final states  

E-Print Network (OSTI)

We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with zero, one, or two or more jets using data corresponding to an integrated luminosity of up to 7.3 fb^{-1} collected with the D0 detector at the Fermilab Tevatron collider. The analysis is sensitive to Higgs boson production via gluon gluon fusion, associated vector boson production, and vector boson fusion, and to Higgs boson decays to tau lepton pairs or W boson pairs. Observed (expected) limits are set on the ratio of 95% C.L. upper limits on the cross section times branching ratio, relative to those predicted by the Standard Model, of 14 (22) at a Higgs boson mass of 115 GeV and 7.7 (6.8) at 165 GeV.

D0 Collaboration

2012-05-16T23:59:59.000Z

178

s-Channel Higgs Boson Production at a Muon-Muon Collider  

Science Journals Connector (OSTI)

High luminosity muon-muon colliders would provide a powerful new probe of Higgs boson physics through s-channel resonance production. We discuss the prospects for detection of Higgs bosons and precision measurements of their masses and widths at such a machine.

V. Barger; M. S. Berger; J. F. Gunion; T. Han

1995-08-21T23:59:59.000Z

179

Review of Central Exclusive Production of the Higgs Boson Beyond the Standard Model  

E-Print Network (OSTI)

We review activities in the field of theoretical, phenomenological and experimental studies related to the production of the Higgs boson in central exclusive processes at LHC in models beyond Standard Model. Prospects in the context of the Higgs boson discovery at LHC in 2012 and of proposals to build forward proton detectors at ATLAS and CMS side are summarized.

Marek Tasevsky

2014-07-31T23:59:59.000Z

180

Bounds on the Nonminimal Coupling of the Higgs Boson to Gravity  

E-Print Network (OSTI)

We derive the first bound on the value of the Higgs boson non-minimal coupling to the Ricci scalar. We show that the recent discovery of the Higgs boson at the Large Hadron Collider at CERN implies that the non-minimal coupling is smaller than $2.6\\times 10^{15}$.

Michael Atkins; Xavier Calmet

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

CDF note 10582 Search for SM Higgs boson production in association with tt using no lepton final state  

E-Print Network (OSTI)

CDF note 10582 Search for SM Higgs boson production in association with t¯t using no lepton final is that t¯t decay all hadronic mode (all t decay into bqq ). In both cases we consider that the Higgs boson discriminant variable from different neural network to discriminate the Higgs boson signal from remained

Fermilab

182

A Measurement of the Recently Discovered Higgs Boson in the Decay into Two Photons with Associated Jets, Using  

E-Print Network (OSTI)

A Measurement of the Recently Discovered Higgs Boson in the Decay into Two Photons with Associated or not this is the Higgs boson as predicted by the Standard Model of Particle Physics (SM). Experimentally measuring of the Higgs boson via its decay into two photons, which was one of the key discovery channels. Part

Sheldon, Nathan D.

183

THEORETICAL PROGRESS FOR THE ASSOCIATED PRODUCTION OF A HIGGS BOSON WITH HEAVY QUARKS AT HADRON COLLIDERS.  

SciTech Connect

The production of a Higgs boson in association with a pair of t{bar t} or b{bar b} quarks plays a very important role at both the Tevatron and the Large Hadron Collider. The theoretical prediction of the corresponding cross sections has been improved by including the complete next-to-leading order QCD corrections. After a brief introduction, we review the results obtained for both the Tevatron and the Large Hadron Collider.

DAWSON,S.JACKSON,C.B.ORR,L.H.REINA,L.WACKEROTH,D.

2003-07-17T23:59:59.000Z

184

DOE Science Showcase - Exciting Higgs Boson Research | OSTI, US Dept of  

Office of Scientific and Technical Information (OSTI)

Exciting Higgs Boson Research Exciting Higgs Boson Research Credit: Claudia Marcelloni, CERN Some of the most exciting research happening in recent decades has been the observation and tentative confirmation of the elusive subatomic particle known as the Higgs boson at the Large Hadron Collider at CERN, Geneva, Switzerland. These findings, produced from one of the largest scientific experiments ever conducted, have provided a direction for the exploration and stringent testing of the Standard Model of physics and if it should be changed as well as new research on models of physics beyond the Standard Model. Read in detail about the Higgs boson experiments, new accelerator designs, and further explorations in Dr. William Watson's latest white paper In the OSTI Collections: the Higgs Boson.

185

Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS  

E-Print Network (OSTI)

A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the Standard Model expectation is observed in 4.5 fb$^{-1}$ (20.3 fb$^{-1}$) of 7 (8) TeV pp collision data collected by the ATLAS experiment. Assuming the Standard Model rate for ZH production, an upper limit of 75%, at the 95% confidence level is set on the branching ratio to invisible-particle decay modes of the Higgs boson at a mass of 125.5 GeV. The limit on the branching ratio is also interpreted in terms of an upper limit on the allowed dark matter--nucleon scattering cross section within a Higgs-portal dark matter scenario. Limits are also set on an additional neutral Higgs boson, in the mass range 110invisible particles.

ATLAS Collaboration

2014-02-13T23:59:59.000Z

186

Rapidity gap signals in Higgs-boson production at the SSC  

Science Journals Connector (OSTI)

We examine the structure of the underlying event in neutral Higgs-boson production at the Superconducting Super Collider (SSC). Gaps, regions of rapidity containing no soft particle production, can provide a clean signature for W boson fusion to the heavy Higgs boson. We first examine the physical basis of gap production and estimate the survival probability of gaps in the minijet model. Then, using pythia, and herwig, we compare gap events to W pair production from top quark decay and qq¯ fusion. We find that, if experimental problems can be overcome, gaps should provide a small, but clean, signal for heavy Higgs-boson production at the SSC.

R. S. Fletcher and T. Stelzer

1993-12-01T23:59:59.000Z

187

The anatomy of electroweak symmetry breaking Tome II: The Higgs bosons in the Minimal Supersymmetric Model  

Science Journals Connector (OSTI)

The second part of this review is devoted to the Higgs sector of the Minimal Supersymmetric Standard Model. The properties of the neutral and charged Higgs bosons of the extended Higgs sector are summarized and their decay modes and production mechanisms at hadron colliders and at future lepton colliders are discussed.

Abdelhak Djouadi

2008-01-01T23:59:59.000Z

188

WMAP-Compliant Benchmark Surfaces for MSSM Higgs Bosons  

E-Print Network (OSTI)

We explore `benchmark surfaces' suitable for studying the phenomenology of Higgs bosons in the minimal supersymmetric extension of the Standard Model (MSSM), which are chosen so that the supersymmetric relic density is generally compatible with the range of cold dark matter density preferred by WMAP and other observations. These benchmark surfaces are specified assuming that gaugino masses m_{1/2}, soft trilinear supersymmetry-breaking parameters A_0 and the soft supersymmetry-breaking contributions m_0 to the squark and slepton masses are universal, but not those associated with the Higgs multiplets (the NUHM framework). The benchmark surfaces may be presented as M_A-tan_beta planes with fixed or systematically varying values of the other NUHM parameters, such as m_0, m_{1/2}, A_0 and the Higgs mixing parameter mu. We discuss the prospects for probing experimentally these benchmark surfaces at the Tevatron collider, the LHC, the ILC, in B physics and in direct dark-matter detection experiments. An Appendix d...

Ellis, Jonathan Richard; Heinemeyer, S; Olive, K A; Weiglein, G

2007-01-01T23:59:59.000Z

189

Charged Higgs boson in the $W^\\pm$ Higgs channel at the Large Hadron Collider  

E-Print Network (OSTI)

In light of the recent discovery of a neutral Higgs boson, $H_{\\rm obs}$, with a mass near 125 GeV, we reassess the LHC discovery potential of a charged Higgs boson, $H^\\pm$, in the $W^\\pm H_{\\rm obs}$ decay channel. This decay channel can be particularly important for a $H^\\pm$ heavier than the top quark, when it is produced through the $pp \\rightarrow tH^\\pm$ process. The knowledge of the mass of $H_{\\rm obs}$ provides an additional handle in the kinematic selection when reconstructing a Breit-Wigner resonance in the $H_{\\rm obs} \\rightarrow b\\bar{b}$ decay channel. We consider some extensions of the Standard Model Higgs sector, with and without supersymmetry, and perform a dedicated signal-to-background analysis to test the scope of this channel for the LHC running at design energy (14 TeV), for 300/fb (standard) and 3000/fb (high) integrated luminosities. We find that, while this channel does not show much promise for a supersymmetric $H^\\pm$ state, significant portions of the parameter spaces of several ...

Enberg, Rikard; Moretti, Stefano; Munir, Shoaib; Wouda, Glenn

2014-01-01T23:59:59.000Z

190

Probing the Higgs Boson via VBF with Single Jet Tagging at the LHC  

E-Print Network (OSTI)

The signature produced by the Standard Model Higgs boson in the Vector Boson Fusion (VBF) mechanism is usually pinpointed by requiring two well separated hadronic jets, one of which (at least) of them tends to be in the forward direction. With the increase of instantaneous luminosity at the LHC, the isolation of the Higgs boson produced with the VBF mechanism is rendered more challenging. In this paper the feasibility of single jet tagging is explored in a high-luminosity scenario. It is demonstrated that the separation in rapidity between the tagging jet and the Higgs boson can be effectively used to isolate the VBF signal. This variable is robust from the experimental and QCD stand points. Single jet tagging allows us to probe the spin-CP quantum numbers of the Higgs boson.

Kruse, Amanda; Kumar, Mukesh; Mellado, Bruce; Ruan, Xifeng

2014-01-01T23:59:59.000Z

191

Observation and measurement of Higgs boson decays to $WW^\\ast$ with the ATLAS detector  

E-Print Network (OSTI)

We report the observation of Higgs boson decays to $WW^{\\ast}$ based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of $25~\\textrm{pb}^{-1}$ from $\\sqrt{s}=7$ and 8 TeV $pp$ collisions recorded by the ATLAS detector at the LHC. For a Higgs boson mass of 125.36 GeV, the ratio of the measured value to the expected value of the total production cross section times branching fraction is $1.09^{+0.16}_{-0.15}~\\textrm{(stat.)}^{+0.17}_{-0.14}~\\textrm{(syst.)}$. The corresponding ratios for the gluon fusion and vector-boson fusion production mechanisms are $1.02\\pm 0.19~\\textrm{(stat.)}^{+0.22}_{-0.18}~\\textrm{(syst.)}$ and $1.27^{+0.44}_{-0.40}~\\textrm{(stat.)}^{+0.30}_{-0.21}~\\textrm{(syst.)}$, respectivel...

Aad, Georges; ATLAS Collaboration; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Ossama; Abramowicz, Halina; Abreu, Henso; Abreu, Ricardo; Abulaiti, Yiming; Acharya, Bobby Samir; Adamczyk, Leszek; Adams, David; Adelman, Jahred; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar-Saavedra, Juan Antonio; Agustoni, Marco; Ahlen, Steven; Ahmadov, Faig; Aielli, Giulio; Akerstedt, Henrik; Åkesson, Torsten Paul Ake; Akimoto, Ginga; Akimov, Andrei; Alberghi, Gian Luigi; Albert, Justin; Albrand, Solveig; Alconada Verzini, Maria Josefina; Aleksa, Martin; Aleksandrov, Igor; Alexa, Calin; Alexander, Gideon; Alexandre, Gauthier; Alexopoulos, Theodoros; Alhroob, Muhammad; Alimonti, Gianluca; Alio, Lion; Alison, John; Allbrooke, Benedict; Allison, Lee John; Allport, Phillip; Aloisio, Alberto; Alonso, Alejandro; Alonso, Francisco; Alpigiani, Cristiano; Altheimer, Andrew David; Alvarez Gonzalez, Barbara; Alviggi, Mariagrazia; Amako, Katsuya; Amaral Coutinho, Yara; Amelung, Christoph; Amidei, Dante; Amor Dos Santos, Susana Patricia; Amorim, Antonio; Amoroso, Simone; Amram, Nir; Amundsen, Glenn; Anastopoulos, Christos; Ancu, Lucian Stefan; Andari, Nansi; Andeen, Timothy; Anders, Christoph Falk; Anders, Gabriel; Anderson, Kelby; Andreazza, Attilio; Andrei, George Victor; Anduaga, Xabier; Angelidakis, Stylianos; Angelozzi, Ivan; Anger, Philipp; Angerami, Aaron; Anghinolfi, Francis; Anisenkov, Alexey; Anjos, Nuno; Annovi, Alberto; Antonelli, Mario; Antonov, Alexey; Antos, Jaroslav; Anulli, Fabio; Aoki, Masato; Aperio Bella, Ludovica; Arabidze, Giorgi; Arai, Yasuo; Araque, Juan Pedro; Arce, Ayana; Arduh, Francisco Anuar; Arguin, Jean-Francois; Argyropoulos, Spyridon; Arik, Metin; Armbruster, Aaron James; Arnaez, Olivier; Arnal, Vanessa; Arnold, Hannah; Arratia, Miguel; Arslan, Ozan; Artamonov, Andrei; Artoni, Giacomo; Asai, Shoji; Asbah, Nedaa; Ashkenazi, Adi; Åsman, Barbro; Asquith, Lily; Assamagan, Ketevi; Astalos, Robert; Atkinson, Markus; Atlay, Naim Bora; Auerbach, Benjamin; Augsten, Kamil; Aurousseau, Mathieu; Avolio, Giuseppe; Axen, Bradley; Azuelos, Georges; Azuma, Yuya; Baak, Max; Baas, Alessandra; Bacci, Cesare; Bachacou, Henri; Bachas, Konstantinos; Backes, Moritz; Backhaus, Malte; Badescu, Elisabeta; Bagiacchi, Paolo; Bagnaia, Paolo; Bai, Yu; Bain, Travis; Baines, John; Baker, Oliver Keith; Balek, Petr; Balli, Fabrice; Banas, Elzbieta; Banerjee, Swagato; Bannoura, Arwa A E; Bansil, Hardeep Singh; Barak, Liron; Baranov, Sergei; Barberio, Elisabetta Luigia; Barberis, Dario; Barbero, Marlon; Barillari, Teresa; Barisonzi, Marcello; Barklow, Timothy; Barlow, Nick; Barnes, Sarah Louise; Barnett, Bruce; Barnett, Michael; Barnovska, Zuzana; Baroncelli, Antonio; Barone, Gaetano; Barr, Alan; Barreiro, Fernando; Barreiro Guimarães da Costa, João; Bartoldus, Rainer; Barton, Adam Edward; Bartos, Pavol; Bartsch, Valeria; Bassalat, Ahmed; Basye, Austin; Bates, Richard; Batista, Santiago Juan; Batley, Richard; Battaglia, Marco; Battistin, Michele; Bauer, Florian; Bawa, Harinder Singh; Beacham, James Baker; Beattie, Michael David; Beau, Tristan; Beauchemin, Pierre-Hugues; Beccherle, Roberto; Bechtle, Philip; Beck, Hans Peter; Becker, Anne Kathrin; Becker, Sebastian; Beckingham, Matthew; Becot, Cyril; Beddall, Andrew; Beddall, Ayda; Bedikian, Sourpouhi; Bednyakov, Vadim; Bee, Christopher; Beemster, Lars; Beermann, Thomas; Begel, Michael; Behr, Katharina; Belanger-Champagne, Camille; Bell, Paul; Bell, William; Bella, Gideon; Bellagamba, Lorenzo; Bellerive, Alain; Bellomo, Massimiliano; Belotskiy, Konstantin; Beltramello, Olga; Benary, Odette; Benchekroun, Driss; Bendtz, Katarina; Benekos, Nektarios; Benhammou, Yan; Benhar Noccioli, Eleonora; Benitez Garcia, Jorge-Armando; Benjamin, Douglas; Bensinger, James; Bentvelsen, Stan; Berge, David; Bergeaas Kuutmann, Elin; Berger, Nicolas; Berghaus, Frank; Beringer, Jürg; Bernard, Clare; Bernard, Nathan Rogers; Bernius, Catrin; Bernlochner, Florian Urs; Berry, Tracey; Berta, Peter; Bertella, Claudia; Bertoli, Gabriele; Bertolucci, Federico; Bertsche, Carolyn; Bertsche, David; Besana, Maria Ilaria; Besjes, Geert-Jan; Bessidskaia, Olga; Bessner, Martin Florian; Besson, Nathalie; Betancourt, Christopher; Bethke, Siegfried; Bevan, Adrian John; Bhimji, Wahid; Bianchi, Riccardo-Maria; Bianchini, Louis; Bianco, Michele; Biebel, Otmar; Bieniek, Stephen Paul; Bierwagen, Katharina; Biglietti, Michela; Bilbao De Mendizabal, Javier; Bilokon, Halina; Bindi, Marcello; Binet, Sebastien; Bingul, Ahmet; Bini, Cesare

2014-01-01T23:59:59.000Z

192

Observation and measurement of Higgs boson decays to $WW^\\ast$ with ATLAS at the LHC  

E-Print Network (OSTI)

We report the observation of the production of the Higgs boson in its decay to $WW^\\ast$, based on an excess over background in the dilepton final state of $6.1$ standard deviations, where the standard model expectation is $5.8$ standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of $3.2$ standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of $25~\\textrm{pb}^{-1}$ from $\\sqrt{s}=7$ and $8$\\,TeV $pp$ collisions recorded by the ATLAS detector at the LHC. For a Higgs-boson mass of $125.36$ GeV, the ratio of the observed to expected values of the total production cross section times branching fraction is $1.08^{+0.16}_{-0.15}~\\textrm{(stat.)}^{+0.16}_{-0.13}~\\textrm{(syst.)}$. The corresponding ratios for the gluon-gluon fusion and vector-boson fusion production mechanisms are $1.01\\pm 0.19~\\textrm{(stat.)}^{+0.20}_{-0.17}~\\textrm{(syst.)}$ and $1.28^{+0.44}_{-0.40}~\\textrm{(stat.)}^{+0.29}_{-0.21...

The ATLAS collaboration

2014-01-01T23:59:59.000Z

193

Implications of Direct Dark Matter Constraints for Minimal Supersymmetric Standard Model Higgs Boson Searches at the Tevatron  

E-Print Network (OSTI)

Searches for the Minimal Supersymmetric Standard Model (MSSM) Higgs bosons are among the most promising channels for exploring new physics at the Tevatron. In particular, interesting regions of large $\\tan \\beta$ and small $m_A$ are probed by searches for heavy neutral Higgs bosons, A and H, when they decay to $\\tau^+ \\tau^-$ and $b\\bar{b}$. At the same time, direct searches for dark matter, such as CDMS, attempt to observe neutralino dark matter particles scattering elastically off nuclei. This can occur through t-channel Higgs exchange, which has a large cross section in the case of large $\\tan \\beta$ and small $m_A$. As a result, there is a natural interplay between the heavy, neutral Higgs searches at the Tevatron and the region of parameter space explored by CDMS. We show that if the lightest neutralino makes up the dark matter of our universe, current limits from CDMS strongly constrain the prospects of heavy, neutral MSSM Higgs discovery at the Tevatron (at 3 sigma with 4 fb^-1 per experiment) unless $|\\mu| \\gsim$ 400 GeV. The limits of CDMS projected for 2007 will increase this constraint to $|\\mu| \\gsim$ 800 GeV. On the other hand, if CDMS does observe neutralino dark matter in the near future, it will make the discovery of heavy, neutral MSSM Higgs bosons far more likely at the Tevatron.

Marcela Carena; Dan Hooper; Peter Skands

2006-08-22T23:59:59.000Z

194

Status of Higgs boson searches at the beginning of the LHC era  

Science Journals Connector (OSTI)

In recent years the Tevatron Run-II collaborations have extended the search for Higgs bosons which was pioneered during the LEP accelerator operation between 1989 and 2000. This review concisely discusses the experimental constraints set by the CDF and DØ collaborations with the complete dataset taken up to September 2011. Model-independent and model-dependent limits on Higgs boson masses and couplings have been set and interpretations are discussed both in the context of the Standard Model and in extended models. In spring 2012 the Tevatron extended the excluded SM Higgs boson mass range to 147 mH mH

A Sopczak

2012-01-01T23:59:59.000Z

195

Combined Search for the Standard Model Higgs Boson Decaying to a bb? Pair Using the Full CDF Data Set  

E-Print Network (OSTI)

We combine the results of searches for the standard model (SM) Higgs boson based on the full CDF Run II data set obtained from ?s=1.96??TeV pp? collisions at the Fermilab Tevatron corresponding to an integrated luminosity ...

Gomez-Ceballos, Guillelmo

196

Higgs boson decay into b-quarks at NNLO accuracy  

E-Print Network (OSTI)

We compute the fully differential decay rate of the Standard Model Higgs boson into b-quarks at next-to-next-to-leading order (NNLO) accuracy in alpha_S. We employ a general subtraction scheme developed for the calculation of higher order perturbative corrections to QCD jet cross sections, which is based on the universal infrared factorization properties of QCD squared matrix elements. We show that the subtractions render the various contributions to the NNLO correction finite. In particular, we demonstrate analytically that the sum of integrated subtraction terms correctly reproduces the infrared poles of the two-loop double virtual contribution to this process. We present illustrative differential distributions obtained by implementing the method in a parton level Monte Carlo program. The basic ingredients of our subtraction scheme, used here for the first time to compute a physical observable, are universal and can be employed for the computation of more involved processes.

Del Duca, Vittorio; Somogyi, Gabor; Tramontano, Francesco; Trocsanyi, Zoltan

2015-01-01T23:59:59.000Z

197

Charged Higgs and Neutral Higgs pair production of weak gauge bosons fusion process in e+ e- collision  

E-Print Network (OSTI)

In this paper, we study the pair production and their decays of the Higges in the neutrinophilic Higgs two doublet model. The pair production occurs through W and Z gauge bosons fusion process. In the neutrinophilic model, the vacuum expectation value (VEV) of the second Higgs doublet is small and is proportional to the neutrino mass. The smallness of VEV is associated with the approximate global U(1) symmetry which is slightly broken. Therefore, there is a suppression factor for the U(1) charge breaking process. The second Higgs doublet has U(1) charge and its single production from the gauge boson fusion violates the U(1) charge conservation and is suppressed strongly to occur. In contrast to the single production, the pair production of the Higgses conserves U(1) charge and the approximate symmetry does not forbid it. To search for the pair productions in collider experiment,we study the production cross section of a pair of the charged Higgs and neutral Higgs bosons in e+ e- collision with center of energy from 600 (GeV) to 2000 (GeV). The total cross section varies from 10^{-4}(fb) to 10^{-3}(fb) for degenerate (200 GeV) charged and neutral Higgses mass case. The background process to the signal is gauge bosons pair W + Z production and their decays. We show the signal over background ratio is about 2% ~ 3% by combining the cross section ratio with ratios of branching fractions.

Takuya Morozumi; Kotaro Tamai

2014-03-31T23:59:59.000Z

198

Citation: K. Nakamura et al. (Particle Data Group), JP G 37, 075021 (2010) and 2011 partial update for the 2012 edition (URL: http://pdg.lbl.gov) Higgs Bosons --H0  

E-Print Network (OSTI)

for the 2012 edition (URL: http://pdg.lbl.gov) Higgs Bosons -- H0 and H± , Searches for A REVIEW GOES HERE ­ Check our WWW List of Reviews STANDARD MODEL H0 (Higgs Boson) MASS LIMITSSTANDARD MODEL H0 (Higgs Boson) MASS LIMITSSTANDARD MODEL H0 (Higgs Boson) MASS LIMITSSTANDARD MODEL H0 (Higgs Boson) MASS LIMITS

199

Higgs Boson May Be Within Sight

 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Higgs Boson May Be Within Sight

 Higgs Boson May Be Within Sight

 Higgs Boson May Be Within Sight

 December 16, 2011 - 3:48pm Addthis Fermilab scientist Don Lincoln describes the concept of how the search for the Higgs boson is accomplished and also includes a brief explanation of the latest data revealed at CERN on Dec. 13. Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What does this project do? Definitive proof in either direction will be enough for physicists to know if their theoretical structure of all matter in the universe is correct. These are exciting times in the world of particle physics.
 
Having completed two new experiments at the world's largest and highest-energy particle accelerator, physicists from the European

200

Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions  

E-Print Network (OSTI)

A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The ...

CMS Collaboration

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Search for the Standard Model Higgs boson in the fully leptonic WW decay channel at CMS.  

E-Print Network (OSTI)

??A search for the Standard Model Higgs boson decaying to W?W? is presented. Data is taken from pp collisions with center of mass energy sqrt(s)… (more)

LeBourgeois, Matthew

2012-01-01T23:59:59.000Z

202

Interference effects of neutral MSSM Higgs bosons with a generalised narrow-width approximation  

E-Print Network (OSTI)

Mixing effects in the MSSM Higgs sector can give rise to a sizeable interference between the neutral Higgs bosons. On the other hand, factorising a more complicated process into production and decay parts by means of the narrow-width approximation (NWA) simplifies the calculation. The standard NWA, however, does not account for interference terms. Therefore, we introduce a generalisation of the NWA (gNWA) which allows for a consistent treatment of interference effects between nearly mass-degenerate particles. Furthermore, we apply the gNWA at the tree and 1-loop level to an example process where the neutral Higgs bosons $h$ and $H$ are produced in the decay of a heavy neutralino and subsequently decay into a fermion pair. The $h-H$ propagator mixing is found to agree well with the approximation of Breit-Wigner propagators times finite wave-function normalisation factors, both leading to a significant interference contribution. The factorisation of the interference term based on on-shell matrix elements reproduces the full interference result within a precision of better than 1% for the considered process. The gNWA also enables the inclusion of contributions beyond the 1-loop order into the most precise prediction.

Elina Fuchs

2014-11-19T23:59:59.000Z

203

Heavy neutral MSSM Higgs Bosons at the PLC - a comparison of two analyses  

E-Print Network (OSTI)

Measurement of the heavy neutral MSSM Higgs bosons H and A production in the process gamma gamma --> A, H --> b anti-b at the Photon Linear Collider has been considered in two independent analyses for the parameter range corresponding to the so-called "LHC wedge". Significantly different conclusions were obtained; signal to background ratio 36 vs 2. Here assumptions and results of these two analyses are compared. We have found that differences in the final results are mainly due to different assumptions on gamma-gamma-luminosity spectra, jet definitions and selection cuts.

M. Spira; P. Niezurawski; M. Krawczyk; A. F. Zarnecki

2006-12-29T23:59:59.000Z

204

Higgs boson gluon-fusion production beyond threshold in N3LO QCD  

E-Print Network (OSTI)

In this article, we compute the gluon fusion Higgs boson cross-section at N3LO through the second term in the threshold expansion. This calculation constitutes a major milestone towards the full N3LO cross section. Our result has the best formal accuracy in the threshold expansion currently available, and includes contributions from collinear regions besides subleading corrections from soft and hard regions, as well as certain logarithmically enhanced contributions for general kinematics. We use our results to perform a critical appraisal of the validity of the threshold approximation at N3LO in perturbative QCD.

Anastasiou, Charalampos; Dulat, Falko; Furlan, Elisabetta; Gehrmann, Thomas; Herzog, Franz; Mistlberger, Bernhard

2014-01-01T23:59:59.000Z

205

On leptonic decay of a heavy quarkonium with a Higgs-boson emission  

E-Print Network (OSTI)

A leptonic $(\\bar l l)$ decay of a heavy quark-antiquark bound state $T(\\bar QQ)$ with a Higgs-boson $H$ emission is investigated. The applying of the well-known low-energy theorem to meson-Higgs coupling allows one to estimate the probability of the decay $T(\\bar QQ)\\to \\bar ll H$. The only a simple version of the Standard Model extension containing two-Higgs doublet is considered.

G. A. Kozlov

2005-06-27T23:59:59.000Z

206

Higgs boson production in association with top quarks in the POWHEG BOX  

E-Print Network (OSTI)

We present results from the analytic calculation of top+antitop+Higgs hadronic production at Next-to-Leading Order in QCD interfaced with parton-shower Monte Carlo event generators in the POWHEG BOX framework. We consider kinematic distributions of the top quark and Higgs boson at the 8 TeV Large Hadron Collider and study the theoretical uncertainties due to specific choices of renormalization/factorization scales and parton-showering algorithms, namely PYTHIA and HERWIG. The importance of spin-correlations in the production and decay stages of a top/antitop quark is discussed on the example of kinematic distributions of leptons originating from the top/antitop decays. The corresponding code is now part of the public release of the POWHEG BOX.

Hartanto, Heribertus B; Reina, Laura; Wackeroth, Doreen

2015-01-01T23:59:59.000Z

207

Search for the Standard Model Higgs Boson Produced in Association with a Z Boson in the Electron-Muon Final State and the Higgs Boson Decaying into Bottom Quarks.  

E-Print Network (OSTI)

??A search for the standard model Higgs boson is presented in the associated production channel Z(??)H(bb) where each tau decays leptonically, one to an electron,… (more)

Bartek, Rachel A.

2013-01-01T23:59:59.000Z

208

Search for Higgs boson production in oppositely charged dilepton and missing energy final states in 9.7??fb-1 of pp¯ collisions at s=1.96??TeV  

Science Journals Connector (OSTI)

We present a search for the Higgs boson in final states with two oppositely charged leptons and large missing transverse energy as expected in H?WW??????? decays. The events are selected from the full Run II data sample of 9.7??fb-1 of pp¯ collisions collected with the D0 detector at the Fermilab Tevatron Collider at s=1.96??TeV. To validate our search methodology, we measure the nonresonant WW production cross section and find ?WW=11.6±0.7??pb, in agreement with the standard model prediction. In the Higgs boson search, no significant excess above the background expectation is observed. Upper limits at the 95% confidence level on the Higgs boson production cross section are therefore derived. Within the standard model, the Higgs boson mass range 159Higgs boson production cross sections 4.1 times larger than the standard model expectation, which is compatible with the presence of a Higgs boson at this mass. Within a theoretical framework with a fourth generation of fermions, the mass range 125results are also interpreted in the context of fermiophobic Higgs boson couplings, which yields an exclusion of fermiophobic Higgs boson production cross sections 3.1 times larger than the expectation for MH=125??GeV.

V. M. Abazov et al. (D0 Collaboration)

2013-09-17T23:59:59.000Z

209

Final state interactions at the threshold of Higgs boson pair production  

E-Print Network (OSTI)

We study the effect of final state interactions at the threshold of Higgs boson pair production in the Glashow-Weinberg-Salam model. We consider three major processes of the pair production in the model: lepton pair annihilation, ZZ fusion, and WW fusion. We find that the corrections caused by the effect for these processes are markedly different. According to our results, the effect can cause non-negligible corrections to the cross sections for lepton pair annihilation and small corrections for ZZ fusion, and this effect is negligible for WW fusion.

Zhang, Zhentao

2015-01-01T23:59:59.000Z

210

Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton–proton collisions at root s= 7 TeV with the ATLAS detector  

E-Print Network (OSTI)

of the Standard Model (SM) Higgs boson [3–5] at this mass.and the branching ratio of a Higgs boson decaying to promptas a function of a Higgs boson mass in the range from 100 to

2013-01-01T23:59:59.000Z

211

Measurements of the Higgs boson mass and width in the four-lepton final state and electron reconstruction in the CMS experiment at the LHC  

E-Print Network (OSTI)

This thesis document reports measurements of the mass and width of the new boson re- cently discovered at the Large Hadron Collider (LHC), candidating to be the Standard Model Higgs boson. The analysis uses proton-proton collision data recorded by the Compact Muon Solenoid (CMS) detector at the LHC, corresponding to integrated luminosities of $5.1~fb^{?1}$ at $7~$TeV center of mass energy and $19.7~fb^{?1}$ at $8~$TeV center of mass energy. Set of events selecting Higgs boson via the $H\\to ZZ$ decay channel, where both $Z$ bosons decay to electron or muon lepton pairs, is used for the Higgs boson properties measurements. A precise measurement of its mass has been performed and gives $125.6\\pm0.4\\mbox{(stat)}\\pm0.2\\mbox{(syst)}~$GeV. Constraints on the Higgs boson width were established using its off-shell production and decay to a pair of $Z$ bosons, where one $Z$ boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The obtained result is an upper limit on the Hi...

Dalchenko, Mykhailo; Charlot, Claude

212

A Search for a Light Charged Higgs Boson Decaying to cs at ?s = 7 TeV.  

E-Print Network (OSTI)

??A search for a light charged Higgs boson decaying into cs is presented using data recorded in pp collisions at ?s = 7 TeV. The… (more)

Martyniuk, Alex Christopher

2011-01-01T23:59:59.000Z

213

Combined measurement of the couplings of the Higgs boson in the $H\\rightarrow WW \\rightarrow \\ell{\\rm \  

E-Print Network (OSTI)

In the given poster, we present the study of the Higgs boson in the $H\\rightarrow WW \\rightarrow \\ell{\\rm \

Kim, HY; The ATLAS collaboration

2014-01-01T23:59:59.000Z

214

The Higgs: Not the Only Boson in Town | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

The Higgs: Not the Only Boson in Town The Higgs: Not the Only Boson in Town High Energy Physics (HEP) HEP Home About Research Facilities Science Highlights Benefits of HEP Funding Opportunities Advisory Committees News & Resources Contact Information High Energy Physics U.S. Department of Energy SC-25/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3624 F: (301) 903-2597 E: sc.hep@science.doe.gov More Information » February 2013 The Higgs: Not the Only Boson in Town Another boson has been found at the LHC that could help refine our understanding of the strong force. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of ATLAS Collaboration The mass spectrum of the bottomonium particle: the left-most peak is the so-called 1P state, the middle peak is the 2P state, and the right-most

215

Search for a Higgs boson in the decay channel H ? ZZ(*) ? q $ \\overline {\\text{q}} $ ? ? ? + in pp collisions at $ \\sqrt {s} = 7 $ TeV  

SciTech Connect

A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, H to ZZ(*) to q q-bar l-l+ is presented. Results are based on data corresponding to an integrated luminosity of 4.6 inverse femtobarns of proton-proton collisions at sqrt(s)=7 TeV, collected with the CMS detector at the LHC. In order to discriminate between signal and background events, kinematic and topological quantities, including the angular spin correlations of the decay products, are employed. Events are further classified according to the probability of the jets to originate from quarks of light or heavy flavor or from gluons. No evidence for the Higgs boson is found, and upper limits on its production cross section are determined for a Higgs boson of mass between 130 and 600 GeV.

Chatrchyan, Serguei; et al.

2012-04-01T23:59:59.000Z

216

Using the Higgs boson to probe the littlest Higgs model with T parity through ZHWH production at the LHC  

Science Journals Connector (OSTI)

In the littlest Higgs model with T-parity, the production cross section of the T-odd heavy gauge boson pair ZHWH is sizable at the LHC. In addition, both the ZH and WH bosons have almost exclusively one decay channel into HAH and WAH, respectively, where the dark matter candidate AH yields a large missing transverse energy signal. Upon the discovery of the Higgs boson at 125 GeV, we study the discovery sensitivity of the final state pp??bb¯+E?T to probe the model at the LHC. We find that the standard model backgrounds are manageable by applying suitable kinematic cuts. The LHC running at s=14??TeV with a 100??fb-1 total luminosity is sensitive to the model with the signal significance above 5 if the symmetry breaking scale f is below about 850 GeV.

Kingman Cheung; Kang Young Lee; So Young Shim; Jeonghyeon Song; Namseok Yoo

2013-05-02T23:59:59.000Z

217

How well do we need to measure the Higgs boson mass and self-coupling?  

Science Journals Connector (OSTI)

Much of the discussion regarding future measurements of the Higgs boson mass and self-coupling is focused on how well various collider options can do. In this article we ask a physics-based question of how well do we need colliders to measure these quantities to have an impact on discovery of new physics or an impact in how we understand the role of the Higgs boson in nature. We address the question within the framework of the Standard Model and various beyond the Standard Model scenarios, including supersymmetry and theories of composite Higgs bosons. We conclude that the LHC’s stated ability to measure the Higgs boson to better than 150 MeV will be as good as we will ever need to know the Higgs boson mass in the foreseeable future. On the other hand, we estimate that the self-coupling will likely need to be measured to better than 20% to see a deviation from the Standard Model expectation. This is a challenging target for future collider and upgrade scenarios.

Rick S. Gupta; Heidi Rzehak; James D. Wells

2013-09-27T23:59:59.000Z

218

Search for the Associated Production of the Standard-Model Higgs Boson in the All-Hadronic Channel  

E-Print Network (OSTI)

We report on a search for the standard-model Higgs boson in pp? collisions at ?s=1.96??TeV using an integrated luminosity of 2.0??fb[superscript -1]. We look for production of the Higgs boson decaying to a pair of bottom ...

Makhoul, K.

219

2014 8 22 4:00PM-5:00PM Title: "Exploration of the Higgs boson and the Physics case for the Large Hadron Electron  

E-Print Network (OSTI)

2014 8 22 4:00PM-5:00PM Title: "Exploration of the Higgs boson and the Physics case for the Large Hadron Electron Collider" Abstract: With the discovery of a Higgs boson at the Large Hadron) Prof. Mellado is an expert on the Higgs boson ­ a sub-atomic particle that is thought to give matter

Wang, Yayu

220

Constraints on models of the Higgs boson with exotic spin and parity using the full CDF data set  

E-Print Network (OSTI)

A search for particles with the same mass and couplings as those of the standard model Higgs boson but different spin and parity quantum numbers is presented. We test two specific non-standard Higgs boson hypotheses: a pseudoscalar Higgs boson with spin-parity $J^P$ = $0^-$ and a graviton-like Higgs boson with $J^P$ = $2^+$, assuming for both a mass of 125 GeV/$c^2$. We search for these exotic states produced in association with a vector boson and decaying into a bottom-antibottom quark pair. The vector boson is reconstructed through its decay into an electron or muon pair, or an electron or muon and a neutrino, or it is inferred from an imbalance in total transverse momentum. We use expected kinematic differences between events containing exotic Higgs bosons and those containing standard model Higgs bosons. The data were collected by the CDF experiment at the Tevatron proton-antiproton collider, operating at a center-of-mass energy of $\\sqrt{s}=1.96$ TeV, and correspond to an integrated luminosity of 9.45 fb$^{-1}$. We observe no significant deviations from the predictions of the standard model with a Higgs boson of mass 125 GeV/$c^2$, and set bounds on the possible rate of production of each exotic state.

T. Aaltonen; CDF Collaboration

2015-01-23T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Constraints on models of the Higgs boson with exotic spin and parity using the full CDF data set  

E-Print Network (OSTI)

A search for particles with the same mass and couplings as those of the standard model Higgs boson but different spin and parity quantum numbers is presented. We test two specific non-standard Higgs boson hypotheses: a pseudoscalar Higgs boson with spin-parity $J^P$ = $0^-$ and a graviton-like Higgs boson with $J^P$ = $2^+$, assuming for both a mass of 125 GeV/$c^2$. We search for these exotic states produced in association with a vector boson and decaying into a bottom-antibottom quark pair. The vector boson is reconstructed through its decay into an electron or muon pair, or an electron or muon and a neutrino, or it is inferred from an imbalance in total transverse momentum. We use expected kinematic differences between events containing exotic Higgs bosons and those containing standard model Higgs bosons. The data were collected by the CDF experiment at the Tevatron proton-antiproton collider, operating at a center-of-mass energy of $\\sqrt{s}=1.96$ TeV, and correspond to an integrated luminosity of 9.45 fb$^{-1}$. We observe no significant deviations from the predictions of the standard model with a Higgs boson of mass 125 GeV/$c^2$, and set bounds on the possible rate of production of each exotic state.

T. Aaltonen; CDF Collaboration

2015-01-20T23:59:59.000Z

222

In the OSTI Collections: the Higgs Boson | OSTI, US Dept of Energy, Office  

Office of Scientific and Technical Information (OSTI)

the Higgs Boson the Higgs Boson Electromagnetism, weak interactions, and Higgs bosons Overview of the findings Further explorations New accelerator designs Uses References Additional References Research Organizations Reports Available through OSTI's SciTech Connect Data Available through OSTI's DOE Data Explorer If you flip a hundred coins and fifty-five of them come up heads, you haven't seen anything out of the ordinary. But if you flip a hundred thousand coins, and fifty-five thousand of them come up heads, you have plenty of reason to think you have ten thousand two-headed coins, give or take a few hundred. Just by looking at the sides that turned up, you wouldn't know which coins were the two-headed ones, but you could reasonably assume that ten thousand is about the right number.

223

Observation of an excess of events in the Higgs boson search in ATLAS  

Science Journals Connector (OSTI)

Abstract A search for the Standard Model Higgs boson with the ATLAS experiment at the LHC is presented. The pp collisions datasets correspond to an integrated luminosity of up to 4.9 fb ? 1 collected at s = 7 TeV in 2011, and up to 5.9 fb ? 1 collected at s = 8 TeV in 2012. Searches for H ? ? ? , H ? Z Z ( ? ) , H ? W W ( ? ) , H ? b b ¯ and H ? ? + ? ? have been performed on the 2011 data, while H ? ? ? and H ? Z Z ( ? ) ? 4 l have been updated using both 2011 and 2012 data. The Standard Model Higgs boson has been excluded at 95% confidence level for masses in the range of 110 to 122.6 GeV and 129.7 to 558 GeV. An excess of events has been observed for a Higgs boson mass hypothesis near 126.5 GeV with a local significance of 5.0?.

Robert D. Harrington

2013-01-01T23:59:59.000Z

224

The Interplay Between Collider Searches For Supersymmetric Higgs Bosons and Direct Dark Matter Experiments  

SciTech Connect

In this article, we explore the interplay between searches for supersymmetric particles and Higgs bosons at hadron colliders (the Tevatron and the LHC) and direct dark matter searches (such as CDMS, ZEPLIN, XENON, EDELWEISS, CRESST, WARP and others). We focus on collider searches for heavy MSSM Higgs bosons (A, H, H{sup {+-}}) and how the prospects for these searches are impacted by direct dark matter limits and vice versa. We find that the prospects of these two experimental programs are highly interrelated. A positive detection of A, H or H{sup {+-}} at the Tevatron would dramatically enhance the prospects for a near future direct discovery of neutralino dark matter. Similarly, a positive direct detection of neutralino dark matter would enhance the prospects of discovering heavy MSSM Higgs bosons at the Tevatron or the LHC. Combining the information obtained from both types of experimental searches will enable us to learn more about the nature of supersymmetry.

Carena, Marcela; Hooper, Dan; /Fermilab; Vallinotto, Alberto; /Fermilab /Chicago U. /Paris, Inst. Astrophys.

2006-11-01T23:59:59.000Z

225

Higgs boson and beyond: the quest for new laws of physics discussed at  

NLE Websites -- All DOE Office Websites (Extended Search)

Frontiers in Science lectures Frontiers in Science lectures Higgs boson and beyond: the quest for new laws of physics discussed at Frontiers in Science lectures The lecture series is intended to increase local public awareness of the diversity of science and engineering research at the Laboratory. October 24, 2012 A candidate Higgs event from a proton-proton collision at the ATLAS experiment, producing two electrons (short blue tracks) and two muons (long blue tracks). A candidate Higgs event from a proton-proton collision at the ATLAS experiment, producing two electrons (short blue tracks) and two muons (long blue tracks). Image courtesy of ATLAS Contact Steve Sandoval Communications Office (505) 665-9206 Email LOS ALAMOS, N.M., Oct. 24, 2012-Los Alamos National Laboratory (LANL) scientist Michael Graesser describes what we know about the Higgs boson

226

Discovery Potential of the Standard Model Higgs Boson Through H -> WW Decay Mode with the ATLAS Detector at LHC  

E-Print Network (OSTI)

We report results of a study of the Standard Model Higgs boson discovery potential through the W-pair leptonic decay modes with the ATLAS detector at LHC at 14 TeV center-of-mass energy. We used MC samples with full detector simulation and reconstruction of the ATLAS experiment to estimate the ATLAS detection sensitivity for the reaction of pp -> H -> WW -> e\

Hai-Jun Yang; for the ATLAS Collaboration

2009-10-01T23:59:59.000Z

227

The Higgs boson in the Standard Model—From LEP to LHC: Expectations, Searches, and Discovery of a Candidate  

Science Journals Connector (OSTI)

The quest for the Higgs boson of the Standard Model, which was a cornerstone in the physics programme at particle colliders operating at the energy frontier for several decades, is the subject of this review. After reviewing the formulation of electroweak symmetry breaking via the Higgs mechanism within the Standard Model, the phenomenology of the Higgs boson at colliders and the theoretical and phenomenological constraints on the Standard Model Higgs sector are discussed. General remarks on experimental searches and the methodology of statistical interpretation are followed by a description of the phenomenology of Higgs-boson production and the corresponding precise predictions. The strategies of the experimental searches and their findings are discussed for the Large Electron Positron Collider (LEP) at CERN, the proton–antiproton collider Tevatron at Fermilab, and the proton–proton Large Hadron Collider (LHC) at CERN. The article concludes with the description of the observation of a Higgs-like boson at the LHC.

S. Dittmaier; M. Schumacher

2013-01-01T23:59:59.000Z

228

Enhancement of "CP-odd" Higgs Boson Production in the Minimal Supersymmetric Standard Model with Explicit CP Violation  

E-Print Network (OSTI)

We calculate the production cross section of the ``CP-odd'' Higgs boson via gluon fusion in the minimal supersymmetric standard model with explicit CP violation in the stop sector. We show that there is a parameter region in which the cross section is enhanced by a factor of about 1000, as compared to the case without CP violation in the stop sector. In the parameter region where the ``CP-odd'' Higgs boson can decay into a stop pair, the stop pair events will be the important signature of the enhanced ``CP-odd'' Higgs boson. In the case where the ``CP-odd'' Higgs boson cannot decay into any superparticles, the gamma gamma and tau tau decay channels could become important for discovering the ``CP-odd'' Higgs boson. We also discuss the constraints from electric dipole moments of electron, neutron and mercury on the viable parameter space mentioned above.

Qing-Hong Cao; Daisuke Nomura; Kazuhiro Tobe; C. -P. Yuan

2005-08-30T23:59:59.000Z

229

Search for New Heavy Higgs Boson in B-L model at the LHC using Monte Carlo Simulation  

E-Print Network (OSTI)

The aim of this work is to search for a new heavy Higgs boson in the B-L extension of the Standard Model at LHC using the data produced from simulated collisions between two protons at different center of mass energies by Monte Carlo event generator programs to find new Higgs boson signatures at the LHC. Also we study the production and decay channels for Higgs boson in this model and its interactions with the other new particles of this model namely the new neutral gauge massive boson and the new fermionic right-handed heavy neutrinos .

Hesham Mansour; Nady Bakhet

2013-04-24T23:59:59.000Z

230

The symmetry and simplicity of the laws of physics and the Higgs boson  

E-Print Network (OSTI)

We describe the theoretical ideas, developed between the 1950s-1970s, which led to the prediction of the Higgs boson, the particle that was discovered in 2012. The forces of nature are based on symmetry principles. We explain the nature of these symmetries through an economic analogy. We also discuss the Higgs mechanism, which is necessary to avoid some of the naive consequences of these symmetries, and to explain various features of elementary particles.

Juan Maldacena

2014-10-24T23:59:59.000Z

231

The symmetry and simplicity of the laws of physics and the Higgs boson  

E-Print Network (OSTI)

We describe the theoretical ideas, developed between the 1950s-1970s, which led to the prediction of the Higgs boson, the particle that was discovered in 2012. The forces of nature are based on symmetry principles. We explain the nature of these symmetries through an economic analogy. We also discuss the Higgs mechanism, which is necessary to avoid some of the naive consequences of these symmetries, and to explain various features of elementary particles.

Maldacena, Juan

2014-01-01T23:59:59.000Z

232

NNLO QCD corrections to Higgs pair production via vector boson fusion at hadron colliders  

E-Print Network (OSTI)

The measurement of the Higgs pair production via vector boson fusion can be used to test the trilinear Higgs self-coupling and the $VVHH$ $(V=Z,W)$ quartic gauge interactions. In this paper we present the calculations of the next-to-next-to-leading-order QCD corrections to the SM Higgs boson pair production via vector boson fusion at hadron colliders with the center-of-mass energy of $14$, $33$, and $100 {\\rm TeV}$ by using the structure function approach, and study the residual uncertainties from the factorization/renormalization scale, parton distribution functions and $\\alpha_s$ on the total cross section. We also provide the distributions of transverse momenta, rapidities, invariant mass and azimuthal angle separations of final Higgs bosons. We observe a considerable quantitative reduction in the scale uncertainty due to the next-to-next-to-leading-order QCD corrections, and find that the total cross section is sensitive to the trilinear Higgs self-coupling.

Ling Liu-Sheng; Zhang Ren-You; Ma Wen-Gan; Guo Lei; Li Wei-Hua; Li Xiao-Zhou

2014-01-30T23:59:59.000Z

233

Collider Detector at Fermilab (CDF): Data from Standard Model and Supersymmetric Higgs Bosons Research of the Higgs Group  

DOE Data Explorer (OSTI)

The Collider Detector at Fermilab (CDF) is a Tevatron experiment at Fermilab. The Tevatron, a powerful particle accelerator, accelerates protons and antiprotons close to the speed of light, and then makes them collide head-on inside the CDF detector. The CDF detector is used to study the products of such collisions. The CDF Physics Group at Fermilab is organized into six working groups, each with a specific focus. The Higgs group searches for Standard Model and Supersymmetric Higgs bosons. Their public web page makes data and numerous figures available from both CDF Runs I and II.

234

Probing minimal supersymmetry at the LHC with the Higgs boson masses  

Science Journals Connector (OSTI)

The ATLAS and CMS collaborations report indications of a Higgs boson at Mh ~ 125 GeV. In addition, CMS data show a tenuous bump in the ZZ channel, at about 320 GeV. We make the bold assumption that it might be the indication of a secondary line corresponding to the heaviest scalar Higgs boson of minimal supersymmetry, H, and discuss the viability of this hypothesis. We discuss also the case of a heavier H. The relevance of the decay channel is underlined.

L Maiani; A D Polosa; V Riquer

2012-01-01T23:59:59.000Z

235

Search for the Higgs boson in the ZH to llbb channel at CDF Run II  

SciTech Connect

The Standard Model of particle physics is in excellent agreement with the observed phenomena of particle physics. Within the Standard Model, the weak and electromagnetic forces are successfully combined. However, this combination is only valid if the masses of the force carriers of the weak force, the Z and W bosons, are massless. In fact, these two particles are the second and third most massive observed elementary particles. Within the minimal Standard Model, the Higgs mechanism is introduced to reconcile this contradiction. Conclusive proof of this theory would come with the discovery of the Higgs boson.

Efron, Jonathan Zvi; /Ohio State U.

2007-08-01T23:59:59.000Z

236

Higgs Boson Signals in Three b-jet Final States at the Fermilab Tevatron  

E-Print Network (OSTI)

At the Fermilab Tevatron, final states with three tagged b-jets could play an important role in searches for a Higgs boson with mass in the range 100-300 GeV. These signals arise from gb fusion and we demonstrate their observability in the limit of a large b-quark Yukawa coupling. Rather promising discovery limits on such a coupling are obtained and consequent effects on the parameter space of the Higgs-boson sector in the MSSM are discussed.

Debajyoti Choudhury; Anindya Datta; Sreerup Raychaudhuri

1998-09-26T23:59:59.000Z

237

Search for a Higgs boson decaying into a Z and a photon in pp collisions at  

Science Journals Connector (OSTI)

Abstract A search for a Higgs boson decaying into a Z boson and a photon is described. The analysis is performed using proton–proton collision datasets recorded by the CMS detector at the LHC. Events were collected at center-of-mass energies of 7 TeV and 8 TeV, corresponding to integrated luminosities of 5.0   fb ? 1 and 19.6   fb ? 1 , respectively. The selected events are required to have opposite-sign electron or muon pairs. No excess above standard model predictions has been found in the 120–160 GeV mass range and the first limits on the Higgs boson production cross section times the H ? Z ? branching fraction at the LHC have been derived. The observed at 95% confidence level limits are between about 4 and 25 times the standard model cross section times the branching fraction. For a standard model Higgs boson mass of 125 GeV the expected limit at the 95% confidence level is 10 and the observed limit is 9.5. Models predicting the Higgs boson production cross section times the H ? Z ? branching fraction to be larger than one order of magnitude of the standard model prediction are excluded for most of the 125–157 GeV mass range.

2013-01-01T23:59:59.000Z

238

Higgs funnel region of SUSY dark matter for small $\\tan?$ and renormalization group effects on pseudoscalar Higgs boson with scalar mass non-universality  

E-Print Network (OSTI)

A non-universal scalar mass supergravity type of model is explored where the first two generation of scalars and the third generation of sleptons may be very massive. Lighter or vanishing third generation of squarks as well as Higgs scalars at the unification scale cause the radiative electroweak symmetry breaking constraint to be less prohibitive. Thus, both FCNC/CP-violation problems as well as the naturalness problem are within control. We identify a large slepton mass effect in the RGE of $m_{H_D}^2$ (for the down type of Higgs) that may turn the later negative at the electroweak scale even for a small $\\tan\\beta$. A hyperbolic branch/focus point like effect is found for $m_A^2$ that may result in very light Higgs spectra. The lightest stable particle is dominantly a bino that pair annihilates via Higgs exchange, giving rise to a WMAP satisfied relic density region for all $\\tan\\beta$. Detection prospects of such LSPs in the upcoming dark matter experiments both of direct and indirect types (photon flux) are interesting. The Higgs bosons and the third generation of squarks are light in this scenario and these may be easily probed besides charginos and neutralinos in the early runs of LHC.

Utpal Chattopadhyay; Debottam Das

2009-02-05T23:59:59.000Z

239

Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs  

Science Journals Connector (OSTI)

Abstract Constraints are presented on the total width of the recently discovered Higgs boson, ? H , using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012, corresponding to integrated luminosities of 5.1   fb ? 1 at a center-of-mass energy s = 7   TeV and 19.7   fb ? 1 at s = 8   TeV . A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of ? H < 22   MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of m H = 125.6   GeV .

2014-01-01T23:59:59.000Z

240

Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton–proton collisions at  TeV with the ATLAS detector  

Science Journals Connector (OSTI)

A search is performed for WH production with a light Higgs boson decaying to hidden-sector particles resulting in clusters of collimated electrons, known as electron-jets. The search is performed with 2.04 fb?1 of data collected in 2011 with the ATLAS detector at the Large Hadron Collider in proton–proton collisions at . One event satisfying the signal selection criteria is observed, which is consistent with the expected background rate. Limits on the product of the WH production cross section and the branching ratio of a Higgs boson decaying to prompt electron-jets are calculated as a function of a Higgs boson mass in the range from 100 to 140 GeV.

G Aad; T Abajyan; B Abbott; J Abdallah; S Abdel Khalek; A A Abdelalim; O Abdinov; R Aben; B Abi; M Abolins; O S AbouZeid; H Abramowicz; H Abreu; B S Acharya; L Adamczyk; D L Adams; T N Addy; J Adelman; S Adomeit; P Adragna; T Adye; S Aefsky; J A Aguilar-Saavedra; M Agustoni; S P Ahlen; F Ahles; A Ahmad; M Ahsan; G Aielli; T P A Åkesson; G Akimoto; A V Akimov; M A Alam; J Albert; S Albrand; M Aleksa; I N Aleksandrov; F Alessandria; C Alexa; G Alexander; G Alexandre; T Alexopoulos; M Alhroob; M Aliev; G Alimonti; J Alison; B M M Allbrooke; L J Allison; P P Allport; S E Allwood-Spiers; J Almond; A Aloisio; R Alon; A Alonso; F Alonso; A Altheimer; B Alvarez Gonzalez; M G Alviggi; K Amako; C Amelung; V V Ammosov; S P Amor Dos Santos; A Amorim; S Amoroso; N Amram; C Anastopoulos; L S Ancu; N Andari; T Andeen; C F Anders; G Anders; K J Anderson; A Andreazza; V Andrei; X S Anduaga; S Angelidakis; P Anger; A Angerami; F Anghinolfi; A Anisenkov; N Anjos; A Annovi; A Antonaki; M Antonelli; A Antonov; J Antos; F Anulli; M Aoki; S Aoun; L Aperio Bella; R Apolle; G Arabidze; I Aracena; Y Arai; A T H Arce; S Arfaoui; J-F Arguin; S Argyropoulos; E Arik; M Arik; A J Armbruster; O Arnaez; V Arnal; A Artamonov; G Artoni; D Arutinov; S Asai; S Ask; B Åsman; L Asquith; K Assamagan; R Astalos; A Astbury; M Atkinson; B Auerbach; E Auge; K Augsten; M Aurousseau; G Avolio; D Axen; G Azuelos; Y Azuma; M A Baak; G Baccaglioni; C Bacci; A M Bach; H Bachacou; K Bachas; M Backes; M Backhaus; J Backus Mayes; E Badescu; P Bagnaia; Y Bai; D C Bailey; T Bain; J T Baines; O K Baker; S Baker; P Balek; F Balli; E Banas; P Banerjee; Sw Banerjee; D Banfi; A Bangert; V Bansal; H S Bansil; L Barak; S P Baranov; T Barber; E L Barberio; D Barberis; M Barbero; D Y Bardin; T Barillari; M Barisonzi; T Barklow; N Barlow; B M Barnett; R M Barnett; A Baroncelli; G Barone; A J Barr; F Barreiro; J Barreiro Guimarães da Costa; R Bartoldus; A E Barton; V Bartsch; A Basye; R L Bates; L Batkova; J R Batley; A Battaglia; M Battistin; F Bauer; H S Bawa; S Beale; T Beau; P H Beauchemin; R Beccherle; P Bechtle; H P Beck; K Becker; S Becker; M Beckingham; K H Becks; A J Beddall; A Beddall; S Bedikian; V A Bednyakov; C P Bee; L J Beemster; M Begel; S Behar Harpaz; C Belanger-Champagne; P J Bell; W H Bell; G Bella; L Bellagamba; M Bellomo; A Belloni; O Beloborodova; K Belotskiy; O Beltramello; O Benary; D Benchekroun; K Bendtz; N Benekos; Y Benhammou; E Benhar Noccioli; J A Benitez Garcia; D P Benjamin; M Benoit; J R Bensinger; K Benslama; S Bentvelsen; D Berge; E Bergeaas Kuutmann; N Berger; F Berghaus; E Berglund; J Beringer; P Bernat; R Bernhard; C Bernius; F U Bernlochner; T Berry; C Bertella; A Bertin; F Bertolucci; M I Besana; G J Besjes; N Besson; S Bethke; W Bhimji; R M Bianchi; L Bianchini; M Bianco; O Biebel; S P Bieniek; K Bierwagen; J Biesiada; M Biglietti; H Bilokon; M Bindi; S Binet; A Bingul; C Bini; C Biscarat; B Bittner; C W Black; J E Black; K M Black; R E Blair; J-B Blanchard; T Blazek; I Bloch; C Blocker; J Blocki; W Blum; U Blumenschein; G J Bobbink; V S Bobrovnikov; S S Bocchetta; A Bocci; C R Boddy; M Boehler; J Boek; T T Boek; N Boelaert; J A Bogaerts; A Bogdanchikov; A Bogouch; C Bohm; J Bohm; V Boisvert; T Bold; V Boldea; N M Bolnet; M Bomben; M Bona; M Boonekamp; S Bordoni; C Borer; A Borisov; G Borissov; I Borjanovic; M Borri; S Borroni; J Bortfeldt; V Bortolotto; K Bos; D Boscherini; M Bosman; H Boterenbrood; J Bouchami; J Boudreau; E V Bouhova-Thacker; D Boumediene; C Bourdarios; N Bousson; S Boutouil; A Boveia; J Boyd; I R Boyko; I Bozovic-Jelisavcic; J Bracinik; P Branchini; A Brandt; G Brandt; O Brandt; U Bratzler; B Brau; J E Brau; H M Braun; S F Brazzale; B Brelier; J Bremer; K Brendlinger; R Brenner; S Bressler; T M Bristow; D Britton; F M Brochu; I Brock; R Brock; F Broggi; C Bromberg; J Bronner; G Brooijmans; T Brooks; W K Brooks; G Brown; P A Bruckman de Renstrom; D Bruncko; R Bruneliere; S Brunet; A Bruni; G Bruni; M Bruschi; L Bryngemark; T Buanes; Q Buat; F Bucci; J Buchanan; P Buchholz; R M Buckingham; A G Buckley; S I Buda; I A Budagov; B Budick; L Bugge; O Bulekov; A C Bundock; M Bunse; T Buran; H Burckhart; S Burdin; T Burgess; S Burke; E Busato; V Büscher; P Bussey; C P Buszello; B Butler; J M Butler; C M Buttar; J M Butterworth; W Buttinger; M Byszewski; S Cabrera Urbán; D Caforio; O Cakir; P Calafiura; G Calderini; P Calfayan; R Calkins; L P Caloba; R Caloi; D Calvet; S Calvet; R Camacho Toro; P Camarri; D Cameron; L M Caminada; R Caminal Armadans; S Campana; M Campanelli; V Canale; F Canelli; A Canepa; J Cantero; R Cantrill; T Cao; M D M Capeans Garrido; I Caprini; M Caprini; D Capriotti; M Capua; R Caputo; R Cardarelli; T Carli; G Carlino; L Carminati; S Caron; E Carquin; G D Carrillo-Montoya; A A Carter; J R Carter; J Carvalho; D Casadei; M P Casado; M Cascella; C Caso; E Castaneda-Miranda; V Castillo Gimenez

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

CP-odd component of the lightest neutral Higgs boson in the MSSM  

E-Print Network (OSTI)

The Higgs sector of the Minimal Supersymmetric Extension of the Standard Model may be described with a two Higgs doublet model with properties that depend on the soft supersymmetry breaking parameters. For instance, flavor independent CP-violating phases associated with the gaugino masses, the squark trilinear mass parameters and the Higgsino mass parameter $\\mu$ may lead to sizable CP-violation in the Higgs sector. For these CP-violation effects to affect the properties of the recently observed SM-like Higgs resonance, the non-standard charged and neutral Higgs bosons masses must be of the order of the weak scale, and both $\\mu$ as well as the trilinear stop mass parameter $A_t$ must be of the order or larger than the stop mass parameters. Constraints on this possibility come from direct searches for non-standard Higgs bosons, precision measurements on the lightest neutral Higgs properties, including its mass, and electric dipole moments. In this article, we discuss these constraints within the MSSM, trying ...

Li, Bing

2015-01-01T23:59:59.000Z

242

Search for a CP-odd Higgs boson decaying to $Zh$ in $pp$ collisions at $\\sqrt{s} = 8$ TeV with the ATLAS detector  

E-Print Network (OSTI)

A search for a heavy, CP-odd Higgs boson, $A$, decaying into a $Z$ boson and a 125 GeV Higgs boson, $h$, with the ATLAS detector at the LHC is presented. The search uses proton--proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb$^{-1}$. Decays of CP-even $h$ bosons to $\\tau\\tau$ or $bb$ pairs with the $Z$ boson decaying to electron or muon pairs are considered, as well as $h \\rightarrow bb$ decays with the $Z$ boson decaying to neutrinos. No evidence for the production of an $A$ boson in these channels is found and the 95% confidence level upper limits derived for $\\sigma (gg\\rightarrow A) \\times \\mbox{BR}(A\\rightarrow Zh) \\times \\mbox{BR}(h\\rightarrow f\\bar{f})$ are 0.098--0.013 pb for $f=\\tau$ and 0.57--0.014 pb for $f=b$ in a range of $m_A =$ 220--1000 GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.

,; ATLAS Collaboration

2015-01-01T23:59:59.000Z

243

Search for neutral Higgs bosons decaying to tau pairs produced in association with b-quarks at s**(1/2)=1.96 TeV  

SciTech Connect

We report results from a search for neutral Higgs bosons decaying to tau pairs produced in association with a b-quark in 1.6 fb{sup -1} of data taken from June 2006 to March 2008 with the D0 detector at Fermi National Accelerator Laboratory. The final state includes a muon, hadronically decaying tau, and jet identified as coming from a b-quark. We set cross section times branching ratio limits on production of such neutral Higgs bosons {phi} in the mass range from 90 GeV to 160 GeV. Exclusion limits are set at the 95% Confidence Level for several supersymmetric scenarios.

Herner, Kenneth Richard; /SUNY, Stony Brook

2008-12-01T23:59:59.000Z

244

Higgs Boson Yukawa Form Factors from Supersymmetric Radiative Fermion Masses  

E-Print Network (OSTI)

The recent discovery of the Higgs-like resonance at $125\\,\\rm{GeV}$ has opened up new avenues in the search for beyond standard model physics. Hints of such extensions could manifest themselves as modifications in the Higgs-fermion couplings and other Higgs related observables. In this work, we study aspects of a class of models where the light fermion masses are radiatively generated. Specifically, we consider models where the light fermion masses, partially or completely, arise from chiral violation in the soft supersymmetry-breaking sector. In these models, the radiatively generated Higgs-fermion Yukawa form factors have non-trivial characteristics and will modify Higgs-fermion couplings from their standard model expectations. A radiatively generated fermion mass could also potentially contribute to large anomalous magnetic moments; this is particularly interesting in the case of the muon where a persistent discrepancy, at the level of around $3\\,\\sigma$, has existed between experiment and theory. Deviatio...

Thalapillil, Arun

2014-01-01T23:59:59.000Z

245

Next-to-next-to-leading order QCD corrections to light Higgs pair production via vector boson fusion in the type II two-Higgs-doublet model  

Science Journals Connector (OSTI)

We present the precision predictions on the pair production of light, CP-even Higgs boson in weak vector boson fusion (VBF) up to the QCD next-to-next-to-leading order (NNLO) at hadron colliders within the CP-conserving type II two-Higgs-doublet model [2HDM(II)] by adopting the structure function approach. We investigate the model parameter dependence, residual uncertainties from the factorization/renormalization scale, PDFs, and ?s on the integrated cross section at the QCD NNLO and find that the NNLO QCD corrections can reduce the scale uncertainty significantly. By analyzing the kinematic distributions of final Higgs bosons, we can extract the CP-even Higgs resonance via the H0?h0h0 channel as a means of probing the extension of the standard model (SM) Higgs sector.

Wei-Hua Li; Ren-You Zhang; Wen-Gan Ma; Lei Guo; Liu-Sheng Ling; Xiao-Zhou Li

2014-04-08T23:59:59.000Z

246

Triple vector boson production through Higgs-Strahlung with NLO multijet merging  

SciTech Connect

Triple gauge boson hadroproduction, in particular the production of three W-bosons at the LHC, is considered at next-to leading order accuracy in QCD. The NLO matrix elements are combined with parton showers. Multijet merging is invoked such that NLO matrix elements with one additional jet are also included. The studies here incorporate both the signal and all relevant backgrounds for V H production with the subsequent decay of the Higgs boson into W– or ?–- pairs. They have been performed using SHERPA+OPENLOOPS in combination with COLLIER.

Hoeche, Stefan; Kraus, Frank [Inst. of Particle Physics Phenomenology (IPPP), Durham Univ. (United Kingdom); Pozzorini, Stephano [Physik-Inst., Univ. of Zurich (Switzerland); Schoenherr, Marek [Inst. of Particle Physics Phenomenology (IPPP), Durham Univ. (United Kingdom); Thompson, Jennifer M. [Inst. of Particle Physics Phenomenology (IPPP), Durham Univ. (United Kingdom); Zapp, Korinna C. [CERN, Dept. of Physics, Geneva (Switzerland)

2014-07-25T23:59:59.000Z

247

Evidence for a Higgs boson in tau decays with the CMS detector  

E-Print Network (OSTI)

In this thesis, I describe the search for a Higgs boson through its decay to a pair of tan leptons with the tau-pair subsequently decaying to ail electron, a muon, and neutrinos. The search is performed using data collected ...

Dutta, Valentina

2014-01-01T23:59:59.000Z

248

Combination of searches for the Higgs boson using the full CDF data set  

E-Print Network (OSTI)

We present a combination of searches for the standard model Higgs boson using the full CDF run II data set, which corresponds to an integrated luminosity of 9.45–10.0??fb[superscript ?1] collected from s? = 1.96??TeV p[¯ ...

Gomez-Ceballos, Guillelmo

249

Combined search for the Higgs boson with the D0 experiment  

E-Print Network (OSTI)

We perform a combination of searches for standard model Higgs boson production in pp-bar collisions recorded by the D0 detector at the Fermilab Tevatron Collider at a center of mass energy of s?=1.96??TeV. The different production and decay channels...

Baringer, Philip S.; Bean, Alice; Clutter, Justace Randall; Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.; Augsten, K.

2013-09-17T23:59:59.000Z

250

Combination of tevatron searches for the standard model Higgs Boson for observing antiferromagnetism and superfluidity  

E-Print Network (OSTI)

We combine searches by the CDF and D0 Collaborations for a Higgs boson decaying to W[superscript +]W[superscript -]. The data correspond to an integrated total luminosity of 4.8 (CDF) and 5.4 (D0) fb[superscript -1] of pp? ...

Bauer, Gerry P.

251

Measurement of the properties of a Higgs boson in the four-lepton final state  

E-Print Network (OSTI)

The properties of a Higgs boson candidate are measured in the H ? ZZ ? 4? decay channel, with ? = e, ?, using data from pp collisions corresponding to an integrated luminosity of 5.1??fb[superscript ?1] at the center-of-mass ...

Apyan, Aram

252

The Reach of CERN LEP2 and Fermilab Tevatron Upgrades for Higgs Bosons in Supersymmetric Models  

E-Print Network (OSTI)

Luminosity upgrades of the Fermilab Tevatron pbar-p collider have been shown to allow experimental detection of a Standard Model (SM) Higgs boson up to $m_{H_{SM}}\\sim 120$ GeV via $WH_{SM} \\to \\ell\

Howard Baer; B. W. Harris; Xerxes Tata

1998-07-06T23:59:59.000Z

253

Search for the associated production of the Higgs boson with a top-quark pair  

E-Print Network (OSTI)

A search for the standard model Higgs boson produced in association with a top-quark pair (tt¯H) is presented, using data samples corresponding to integrated luminosities of up to 5.1 fb?1 and 19.7 fb?1 collected in pp ...

CMS Collaboration

254

Novel inclusive search for the Higgs boson in the four-lepton final state at CDF  

E-Print Network (OSTI)

An inclusive search for the standard model Higgs boson using the four-lepton final state in proton-antiproton collisions produced by the Tevatron at ?s=1.96??TeV is conducted. The data are recorded by the CDF II detector ...

Gomez-Ceballos, Guillelmo

255

Inclusive Search for Standard Model Higgs Boson Production in the WW Decay Channel using the CDF II Detector  

E-Print Network (OSTI)

We present a search for standard model (SM) Higgs boson production using ppbar collision data at sqrt(s) = 1.96 TeV, collected with the CDF II detector and corresponding to an integrated luminosity of 4.8 fb-1. We search for Higgs bosons produced in all processes with a significant production rate and decaying to two W bosons. We find no evidence for SM Higgs boson production and place upper limits at the 95% confidence level on the SM production cross section (sigma(H)) for values of the Higgs boson mass (m_H) in the range from 110 to 200 GeV. These limits are the most stringent for m_H > 130 GeV and are 1.29 above the predicted value of sigma(H) for mH = 165 GeV.

The CDF Collaboration; T. Aaltonen

2010-02-17T23:59:59.000Z

256

Constraints on models of the Higgs boson with exotic spin and parity using the full CDF data set  

E-Print Network (OSTI)

A search for particles with the same mass and couplings as those of the standard model Higgs boson but different spin and parity quantum numbers is presented. We test two specific non-standard Higgs boson hypotheses: a pseudoscalar Higgs boson with spin-parity $J^P$ = $0^-$ and a graviton-like Higgs boson with $J^P$ = $2^+$, assuming for both a mass of 125 GeV/$c^2$. We search for these exotic states produced in association with a vector boson and decaying into a bottom-antibottom quark pair. The vector boson is reconstructed through its decay into an electron or muon pair, or an electron or muon and a neutrino, or it is inferred from an imbalance in total transverse momentum. We use expected kinematic differences between events containing exotic Higgs bosons and those containing standard model Higgs bosons. The data were collected by the CDF experiment at the Tevatron proton-antiproton collider, operating at a center-of-mass energy of $\\sqrt{s}=1.96$ TeV, and correspond to an integrated luminosity of 9.45 fb...

Aaltonen, T

2015-01-01T23:59:59.000Z

257

Constraining a fourth generation of quarks: non-perturbative Higgs boson mass bounds  

E-Print Network (OSTI)

We present a non-perturbative determination of the upper and lower Higgs boson mass bounds with a heavy fourth generation of quarks from numerical lattice computations in a chirally symmetric Higgs-Yukawa model. We find that the upper bound only moderately rises with the quark mass while the lower bound increases significantly, providing additional constraints on the existence of a straight-forward fourth quark generation. We examine the stability of the lower bound under the addition of a higher dimensional operator to the scalar field potential using perturbation theory, demonstrating that it is not significantly altered for small values of the coupling of this operator. For a Higgs boson mass of $\\sim125\\mathrm{GeV}$ we find that the maximum value of the fourth generation quark mass is $\\sim300\\mathrm{GeV}$, which is already in conflict with bounds from direct searches.

John Bulava; Karl Jansen; Attila Nagy

2013-01-15T23:59:59.000Z

258

Exotic decays of the 125 GeV Higgs boson  

Science Journals Connector (OSTI)

We perform an extensive survey of nonstandard Higgs decays that are consistent with the 125 GeV Higgs-like resonance. Our aim is to motivate a large set of new experimental analyses on the existing and forthcoming data from the Large Hadron Collider (LHC). The explicit search for exotic Higgs decays presents a largely untapped discovery opportunity for the LHC collaborations, as such decays may be easily missed by other searches. We emphasize that the Higgs is uniquely sensitive to the potential existence of new weakly coupled particles and provide a unified discussion of a large class of both simplified and complete models that give rise to characteristic patterns of exotic Higgs decays. We assess the status of exotic Higgs decays after LHC run I. In many cases we are able to set new nontrivial constraints by reinterpreting existing experimental analyses. We point out that improvements are possible with dedicated analyses and perform some preliminary collider studies. We prioritize the analyses according to their theoretical motivation and their experimental feasibility. This document is accompanied by a Web site that will be continuously updated with further information [http://exotichiggs.physics.sunysb.edu].

David Curtin; Rouven Essig; Stefania Gori; Prerit Jaiswal; Andrey Katz; Tao Liu; Zhen Liu; David McKeen; Jessie Shelton; Matthew Strassler; Ze’ev Surujon; Brock Tweedie; Yi-Ming Zhong

2014-10-13T23:59:59.000Z

259

Inverse seesaw in NMSSM and 126 GeV Higgs boson  

Science Journals Connector (OSTI)

We consider extensions of the next-to-minimal supersymmetric model (NMSSM) in which the observed neutrino masses are generated through a TeV scale inverse seesaw mechanism. The new particles associated with this mechanism can have sizable couplings to the Higgs field which can yield a large contribution to the mass of the lightest CP-even Higgs boson. With this new contribution, a 126 GeV Higgs is possible along with order of 200 GeV masses for the stop quarks for a broad range of tan ?. The Higgs production and decay in the diphoton channel can be enhanced due to this new contribution. It is also possible to solve the little hierarchy problem in this model without invoking a maximal value for the NMSSM trilinear coupling and without severe restrictions on the value of tan ?.

Ilia Gogoladze; Bin He; Qaisar Shafi

2013-01-01T23:59:59.000Z

260

Combined Tevatron upper limit on gg --> H --> W[superscript +]W[superscript -] and constraints on the Higgs boson mass in fourth-generation fermion models  

E-Print Network (OSTI)

We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg-->H-->W+W- in pp? collisions at the Fermilab Tevatron Collider at [sqrt]s=1.96??TeV. With 4.8??fb-1 ...

Paus, Christoph M. E.

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261

Search for Higgs Bosons Produced in Association with b-Quarks  

We present a search for neutral Higgs bosons ? decaying into bb?, produced in association with b quarks in ppb? collisions. This process could be observable in supersymmetric models with high values of tan ?. The event sample corresponds to 2.6 fb-1 of integrated luminosity collected with the CDF II detector at the Fermilab Tevatron collider. We search for an enhancement in the mass of the two leading jets in events with three jets identified as coming from b quarks using a displaced vertex algorithm. A data-driven procedure is used to estimate the dijet mass spectrum of the nonresonant multijet background. The contributions of backgrounds and a possible Higgs boson signal are determined by a two-dimensional fit of the data, using the dijet mass together with an additional variable which is sensitive to the flavor composition of the three tagged jets. We set mass-dependent limits on ?(ppb? = ?b) x ?(?= bb?) which are applicable for a narrow scalar particle ? produced in association with b quarks. We also set limits on tan ? in supersymmetric Higgs models including the effects of the Higgs boson width.

Aaltonen, T [Helsinki Inst. of Phys.; Alvarez Gonzalez, B [Oviedo U.; Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U.; Dubna, JINR

2012-02-22T23:59:59.000Z

262

NNLO QCD corrections to Higgs pair production via vector boson fusion at hadron colliders  

E-Print Network (OSTI)

The measurement of the Higgs pair production via vector boson fusion can be used to test the trilinear Higgs self-coupling and the $VVHH$ $(V=Z,W)$ quartic gauge interactions. In this paper we present the calculations of the next-to-next-to-leading order (NNLO) QCD corrections to the SM Higgs boson pair production via vector boson fusion at hadron colliders with the center-of-mass energy of $14~{\\rm TeV}$, $33~{\\rm TeV}$ and $100~{\\rm TeV}$ by using the structure function approach, and study the residual uncertainties from the factorization/renormalization scale, parton distribution functions and $\\alpha_s$ on the total cross section. We also provide the distributions of transverse momenta, rapidities, invariant mass and azimuthal angle separations of final products. We observe a considerable quantitative reduction in the scale uncertainty due to the NNLO QCD corrections, and find that the total cross section is sensitive to the trilinear Higgs self-coupling.

Liu-Sheng, Ling; Wen-Gan, Ma; Lei, Guo; Wei-Hua, Li; Xiao-Zhou, Li

2014-01-01T23:59:59.000Z

263

Search for Higgs Bosons Produced in Association with b-Quarks  

SciTech Connect

We present a search for neutral Higgs bosons ? decaying into bb?, produced in association with b quarks in ppb? collisions. This process could be observable in supersymmetric models with high values of tan ?. The event sample corresponds to 2.6 fb-1 of integrated luminosity collected with the CDF II detector at the Fermilab Tevatron collider. We search for an enhancement in the mass of the two leading jets in events with three jets identified as coming from b quarks using a displaced vertex algorithm. A data-driven procedure is used to estimate the dijet mass spectrum of the nonresonant multijet background. The contributions of backgrounds and a possible Higgs boson signal are determined by a two-dimensional fit of the data, using the dijet mass together with an additional variable which is sensitive to the flavor composition of the three tagged jets. We set mass-dependent limits on ?(ppb? = ?b) x ?(?= bb?) which are applicable for a narrow scalar particle ? produced in association with b quarks. We also set limits on tan ? in supersymmetric Higgs models including the effects of the Higgs boson width.

Aaltonen, T [Helsinki Inst. of Phys.; Alvarez Gonzalez, B [Oviedo U.; Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U.; Dubna, JINR

2012-02-22T23:59:59.000Z

264

Search for a light charged Higgs boson in the decay channel H^+  – > c¯s using the ATLAS detector.  

E-Print Network (OSTI)

??A search for a light charged Higgs boson (H^±) decaying into two jets (c¯s) using pp collisions at s = sqrt(7 TeV) is presented. A… (more)

Trifis, Omran

2013-01-01T23:59:59.000Z

265

Search for Standard Model Higgs Boson Production in Association with a W Boson using a Neural Network  

SciTech Connect

We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (p{bar p} {yields} W{sup {+-}}H {yields} {ell}{nu}b{bar b}) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector that correspond to an integrated luminosity of approximately 1.9 fb{sup -1}. We select events consistent with a signature of a single charged lepton (e{sup {+-}}/{mu}{sup {+-}}), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method, a jet probability tagging method, and a neural network filter. We use kinematic information in an artificial neural network to improve discrimination between signal and background compared to previous analyses. The observed number of events and the neural network output distributions are consistent with the standard model background expectations, and we set 95% confidence level upper limits on the production cross section times branching fraction ranging from 1.2 to 1.1 pb or 7.5 to 102 times the standard model expectation for Higgs boson masses from 110 to 150 GeV/c{sup 2}, respectively.

Aaltonen, T.; /Helsinki Inst. of Phys.; Adelman, Jahred A.; /Chicago U., EFI; Akimoto, T.; /Tsukuba U.; Alvarez Gonzalez, B.; /Cantabria Inst. of Phys.; Amerio, S.; /INFN, Padua; Amidei, Dante E.; /Michigan U.; Anastassov, A.; /Northwestern U.; Annovi, Alberto; /Frascati; Antos, Jaroslav; /Comenius U.; Apollinari, G.; /Fermilab; Apresyan, A.; /Purdue U. /Waseda U.

2009-05-01T23:59:59.000Z

266

Search for standard model Higgs boson production in association with a W boson using a neural network discriminant at CDF  

SciTech Connect

We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (pp{yields}W{sup {+-}}H{yields}l{nu}bb) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector that correspond to an integrated luminosity of approximately 1.9 fb{sup -1}. We select events consistent with a signature of a single charged lepton (e{sup {+-}}/{mu}{sup {+-}}), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method, a jet probability tagging method, and a neural network filter. We use kinematic information in an artificial neural network to improve discrimination between signal and background compared to previous analyses. The observed number of events and the neural network output distributions are consistent with the standard model background expectations, and we set 95% confidence level upper limits on the production cross section times branching fraction ranging from 1.2 to 1.1 pb or 7.5 to 102 times the standard model expectation for Higgs boson masses from 110 to 150 GeV/c{sup 2}, respectively.

Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; Remortel, N. van [Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland); Adelman, J.; Brubaker, E.; Fedorko, W. T.; Grosso-Pilcher, C.; Ketchum, W.; Kim, Y. K.; Krop, D.; Kwang, S.; Lee, H. S.; Paramonov, A. A.; Schmidt, M. A.; Shiraishi, S.; Shochet, M. [Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)] (and others)

2009-07-01T23:59:59.000Z

267

The Higgs boson and Top quark masses as tests of Electroweak Vacuum Stability  

E-Print Network (OSTI)

The measurements of the Higgs boson and top quark masses can be used to extrapolate the Standard Model Higgs potential at energies up to the Planck scale. Adopting a NNLO renormalization procedure, we: i) find that electroweak vacuum stability is at present allowed, discuss the associated theoretical and experimental errors and the prospects for its future tests; ii) determine the boundary conditions allowing for the existence of a shallow false minimum slightly below the Planck scale, which is a stable configuration that might have been relevant for primordial inflation; iii) derive a conservative upper bound on type I seesaw right-handed neutrino masses, following from the requirement of electroweak vacuum stability.

Masina, Isabella

2013-01-01T23:59:59.000Z

268

Higgs boson and Top quark masses as tests of Electroweak Vacuum Stability  

E-Print Network (OSTI)

The measurements of the Higgs boson and top quark masses can be used to extrapolate the Standard Model Higgs potential at energies up to the Planck scale. Adopting a NNLO renormalization procedure, we: i) find that electroweak vacuum stability is at present allowed, discuss the associated theoretical and experimental errors and the prospects for its future tests; ii) determine the boundary conditions allowing for the existence of a shallow false minimum slightly below the Planck scale, which is a stable configuration that might have been relevant for primordial inflation; iii) derive a conservative upper bound on type I seesaw right-handed neutrino masses, following from the requirement of electroweak vacuum stability.

Isabella Masina

2012-09-03T23:59:59.000Z

269

Next-to-next-to-leading order QCD corrections to light Higgs pair production via vector boson fusion in type-II two-Higgs-doublet model  

E-Print Network (OSTI)

We present the precision predictions on the pair production of light, $CP$-even Higgs in weak vector boson fusion (VBF) up to the QCD next-to-next-to-leading-order (NNLO) at hadron colliders within the $CP$-conserving type-II two-Higgs-doublet model (2HDM(II)) by adopting the structure function approach. We investigate the model parameter dependence, residual uncertainties from the factorization/renormalization scale, PDFs and $\\alpha_s$ on the integrated cross section at the QCD NNLO, and find that the NNLO QCD corrections can reduce the scale uncertainty significantly. By analyzing the kinematic distributions of final Higgs bosons, we can extract the $CP$-even Higgs resonance via $H^0 \\to h^0 h^0$ channel as a means of probing the extension of the Standard Model (SM) Higgs sector.

Li Wei-Hua; Zhang Ren-You; Ma Wen-Gan; Guo Lei; Ling Liu-Sheng; Li Xiao-Zhou

2014-03-12T23:59:59.000Z

270

Next-to-next-to-leading order QCD corrections to light Higgs pair production via vector boson fusion in type-II two-Higgs-doublet model  

E-Print Network (OSTI)

We present the precision predictions on the pair production of light, $CP$-even Higgs in weak vector boson fusion (VBF) up to the QCD next-to-next-to-leading-order (NNLO) at hadron colliders within the $CP$-conserving type-II two-Higgs-doublet model (2HDM(II)) by adopting the structure function approach. We investigate the model parameter dependence, residual uncertainties from the factorization/renormalization scale, PDFs and $\\alpha_s$ on the integrated cross section at the QCD NNLO, and find that the NNLO QCD corrections can reduce the scale uncertainty significantly. By analyzing the kinematic distributions of final Higgs bosons, we can extract the $CP$-even Higgs resonance via $H^0 \\to h^0 h^0$ channel as a means of probing the extension of the Standard Model (SM) Higgs sector.

Wei-Hua, Li; Wen-Gan, Ma; Lei, Guo; Liu-Sheng, Ling; Xiao-Zhou, Li

2014-01-01T23:59:59.000Z

271

Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson  

E-Print Network (OSTI)

We study the longitudinal polarization of the tau lepton in B -> D tau nu decay. After discussing possible sensitivities of tau decay modes to the tau polarization, we examine the effect of charged Higgs boson on the tau polarization in B -> D tau nu. We find a relation between the decay rate and the tau polarization, and clarify the role of the tau polarization measurement in the search for the charged Higgs boson.

Minoru Tanaka; Ryoutaro Watanabe

2010-05-24T23:59:59.000Z

272

Why & How Higgs  

NLE Websites -- All DOE Office Websites (Extended Search)

Follow the journey in these news stories as the search narrows from 1999 to Follow the journey in these news stories as the search narrows from 1999 to 2011. LEP pursues Higgs boson and greater W precision - CERN Courier, November 2, 1999 The Search for the Higgs Boson - Science, January 12, 2001 The final curtain falls on LEP - CERN Courier, January 25, 2001 Season of Higgs and melodrama (page 2) - CERN Courier, February 26, 2001 Tevatron experiments report new Higgs search results - Fermilab Today, March 14, 2001 Hunting for Higgs Has Begun - Fermilab Today, September 25, 2003 DZero: Are there exotic Higgs particles - Fermilab Today, November 13, 2003 CDF hunts for the Higgs - Fermilab TodayJune 3, 2004 Top Quarks are a Higgs' Best Friends - Fermilab Today, June 16, 2005 DZero hones in on the Higgs - Fermilab Today, June 8, 2006

273

SUSY Higgs boson flavor-changing neutral currents at the LHC  

E-Print Network (OSTI)

We compute and analyze the Flavor-Changing Neutral Current (FCNC) interactions of Minimal Supersymmetric Standard Model Higgs bosons (h = h0, H0, A0) with heavy quarks (top and bottom), focusing on the strongly-interacting sector. We correlate the Higgs bosons production cross-section at the LHC with the FCNC decay branching ratios and find the maximum allowed values of the production rates, sigma(pp -> h -> qq') = sigma(pp -> h) x B(h -> qq') (qq'= tc or bs) after taking into account limits from low energy data on flavor-changing interactions. We single out the top channel, with a maximum production rate of sigma^max(pp -> h -> tc) =~ 10^-3 - 10^-2 pb, as the most promising FCNC channel to be detected at the LHC.

Santi Bejar; Jaume Guasch; Joan Sola

2006-01-30T23:59:59.000Z

274

Search for the Higgs boson in the $\\mathrm{b\\bar{b}}$ decay channel using the CMS detector  

E-Print Network (OSTI)

A search for the standard model Higgs boson in the \\bbbar decay channel has been carried out with the CMS detector at the LHC collider. The searched production modes are the associated VH production, the VBF production and the production in association with top quark pairs (ttH). The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5 fb$^{-1}$ and 20 fb$^{-1}$, respectively. The strategy and results of the searches are reported.

Vernieri, Caterina

2014-01-01T23:59:59.000Z

275

Phenomenology of non-universal gaugino masses and implications for the Higgs boson decay  

E-Print Network (OSTI)

Grand unified theories (GUTs) can lead to non-universal gaugino masses at the unification scale. We study the implications of such non-universal gaugino masses for the composition of the lightest neutralino in supersymmetric (SUSY) theories based on SU(5) gauge group. We also consider the phenomenological implications of non-universal gaugino masses for the phenomenology of Higgs bosons in the context of Large Hadron Collider.

Katri Huitu; Jari Laamanen; P. N. Pandita; Sourov Roy

2006-08-29T23:59:59.000Z

276

Virtual corrections to Higgs boson pair production in the large top quark mass limit  

Science Journals Connector (OSTI)

Abstract We calculate the three-loop matching coefficient C H H , required for a consistent description of Higgs boson pair production in gluon fusion through next-to-next-to-leading order QCD in the heavy top quark approximation. We also compute the g g ? H H amplitude in m t ? ? approximation in the full theory and show its consistency with an earlier computation in heavy-top effective theory.

Jonathan Grigo; Kirill Melnikov; Matthias Steinhauser

2014-01-01T23:59:59.000Z

277

Detecting an invisible Higgs boson at Fermilab Tevatron and CERN LHC  

E-Print Network (OSTI)

In this paper, we study the observability of an invisible Higgs boson at Fermilab Tevatron and CERN LHC through the production channel $ q \\bar{q} \\to Z H \\to \\ell^+\\ell^-+ \\ptmiss $, where $\\ptmiss$ is reconstructed from the $\\ell^+\\ell^-$ with $\\ell=e$ or $\\mu$. A new strategy is proposed to eliminate the largest irreducible background, namely $ q \\bar{q} \\to Z(\\to \\ell^+\\ell^-) Z(\\to \

Shou-hua Zhu

2005-12-05T23:59:59.000Z

278

Estimation of LHC and ILC Capabilities for Precision Higgs Boson Coupling Measurements  

E-Print Network (OSTI)

This paper discusses some aspects of the estimates of Higgs boson coupling sensitivities for LHC and ILC presented at the Snowmass 2013 meeting. I estimate the measurement accuracies underlying the CMS presentation to Snowmass. I present new fits for the ILC capabilities. I present some joints fits to prospective LHC and ILC data that demonstrates the synergy of the High-Luminosity LHC and ILC programs. Contributed to the proceedings of the Snowmass 2013 Community Summer Study.

Michael E. Peskin

2013-12-17T23:59:59.000Z

279

Neutral Higgs-pair production at Linear Colliders within the general 2HDM: quantum effects and triple Higgs boson self-interactions  

E-Print Network (OSTI)

The pairwise production of neutral Higgs bosons is analyzed in the context of the future linear colliders, such as the ILC and CLIC, within the general Two-Higgs-Doublet Model (2HDM). The corresponding cross-sections are computed at the one-loop level in full compliance with the current phenomenological bounds and the stringent theoretical constraints inherent to the consistency of the model. We uncover regions across the 2HDM parameter space, mainly for low tan\\beta near 1 and moderate values of the relevant lambda_5 parameter, wherein the radiative corrections to the Higgs-pair production cross sections can comfortably reach 50% This behavior can be traced back to the enhancement capabilities of the trilinear Higgs self-interactions -- a trademark feature of the 2HDM, with no counterpart in the Minimal Supersymmetric Standard Model. Interestingly enough, the quantum effects are positive for energies around 500 GeV, thereby producing a significant enhancement in the expected number of events precisely around the fiducial startup energy of the ILC. The Higgs-pair production rates can be substantial, typically amounting to a few thousand events per 500 inverse femtobarn of integrated luminosity. In contrast, the corrections are negative in the highest energy range (1 TeV). We also compare the exclusive pairwise production of Higgs bosons with the inclusive gauge boson fusion channels leading to 2H+X finals states, and also with the exclusive triple Higgs boson production. We find that these multiparticle final states can be highly complementary in the overall Higgs bosons search strategy.

David Lopez-Val; Joan Sola

2010-01-08T23:59:59.000Z

280

Search for the standard model Higgs boson decaying to bottom quarks in pp collisions at ?s = 7 TeV  

E-Print Network (OSTI)

A search for the standard model Higgs boson (H) decaying to b[bar over b] when produced in association with weak vector bosons (V) is reported for the following modes: W(??)H, W(e?)H, Z(??)H, Z(ee)H and Z(??)H. The search ...

Alver, B.

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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281

arXiv:hep-ph/0105014v217May2001 A Light Higgs Boson Explanation for the g -2 Crisis a  

E-Print Network (OSTI)

arXiv:hep-ph/0105014v217May2001 A Light Higgs Boson Explanation for the g - 2 Crisis a A. Dedes1-even Higgs boson with a mass of around 10 GeV could explain the recent BNL measurement of the muon anomalous) the Upsilon mass. It may be possible to exclude or discover such a Higgs boson by fully analyzing the existing

California at Santa Cruz, University of

282

Electroweak Symmetry Breaking and the Higgs Boson: Confronting Theories at Colliders  

E-Print Network (OSTI)

In this review, we discuss methods of parsing direct and indirect information from collider experiments regarding the Higgs boson and describe simple ways in which experimental likelihoods can be consistently reconstructed and interfaced with model predictions in pertinent parameter spaces. Ultimately these methods are used to constrain a five-dimensional parameter space describing a model-independent framework for electroweak symmetry breaking. We review prevalent scenarios for extending the electroweak symmetry breaking sector relative to the Standard Model and emphasize their predictions for nonstandard Higgs phenomenology that could be observed in LHC data if naturalness is realized in particular ways. Specifically we identify how measurements of Higgs couplings can be used to imply the existence of new physics at particular scales within various contexts, highlighting some parameter spaces of interest in order to give examples of how the data surrounding the new state can most effectively be used to constrain specific models of weak scale physics.

Aleksandr Azatov; Jamison Galloway

2012-12-06T23:59:59.000Z

283

Note Date Preliminary Title Speaker Institution Email Contact Aug 29, 2012 The Discovery of the Higgs Boson Jim Alexander Cornell jim.alexander@cornell.edu Napolitano  

E-Print Network (OSTI)

of the Higgs Boson Jim Alexander Cornell jim.alexander@cornell.edu Napolitano JN Away Sep 5, 2012 Live 3D

Varela, Carlos

284

Search for Higgs boson production in proton-antiproton collisions at s**(1/2) = 1.96 TeV  

SciTech Connect

We performed a search for Standard Model Higgs boson production in association with W boson (p{bar p} {yields} W{sup {+-}}H {yields} {ell}{nu}b{bar b}) in p{bar p} collisions at {radical}s = 1.96 TeV. The search uses the data collected between February 2002 and February 2006 at Collider Detector at Fermilab (CDF), which corresponds to an integrated luminosity of about 1 fb{sup -1}. The experimental final state of WH {yields} {ell}{nu}b{bar b} process is lepton (e{sup {+-}}/{mu}{sup {+-}}), missing transverse energy and two jets. The largest background in lepton+jets events is W+light flavor process, therefore the identification of jets as b-jets reduces this kind of background significantly. We used displaced SECondary VerTeX b-tagging (SECVTX) technique, which utilizes the signature that b-jets have secondary vertex displaced away from primary vertex because of the long life time of B-mesons. However, there is still much contamination in SECVTX b-tagged jets. Finite resolution of secondary vertex tracking measurements results in false tags, and c-jets are also identified as b-jets due to the long life time of D-mesons frequently. For the purpose of increasing the purity of the SECVTX b-tagged jets, we applied Neural Network to SECVTX tagged jets for the first time by using secondary vertex variables and some variables independent of it. Neural Network filter rejects 65% of light flavor jets and 50% of c-jets from the SECVTX tagged jets. We improved the sensitivity of the Higgs boson signal search by 10% with Neural Network b-tagging technique. Events with one high p{sub T} electron or muon, large missing transverse energy and either single SECVTX b-tagged jet which passes the Neural Network filter or at least two SECVTX b-tagged jets are selected. The number of selected events and dijet mass distributions are consistent with the Standard Model background expectations. Therefore we set an upper limit on {sigma}(p{bar p} {yields} WH) {center_dot} Br(H {yields} b{bar b}) as 3.9 to 1.3 for Higgs boson mass from 110 to 150 GeV/c{sup 2} at 95% confidence level (C.L.). The upper limit obtained from WH {yields} {ell}{nu}b{bar b} process with 1 fb{sup -1} is far away from the Standard Model Higgs boson production expectation by a factor of 20 to 100 as a function of Higgs boson mass. To obtain stronger constraint on the Higgs boson production, we combined the upper limits obtained in processes of ZH {yields} {nu}{bar {nu}}b{bar b}, ZH {yields} {ell}{bar {ell}}b{bar b} and gg {yields} H {yields} W{sup +}W{sup -} {yields} {ell}{bar {ell}}{nu}{bar {nu}} at CDF. The combination of different channels gives a constraint on the ratio of 95% confidence level upper limit divided by the Standard Model prediction (({sigma} {center_dot} Br){sub 95}/({sigma} {center_dot} Br){sub SM}), which results in the ratio as 10 to 40 for Higgs boson mass between 110 and 200 GeV/c{sup 2}. Finally, the combination of Higgs boson searches between CDF and D0 is also performed. The resulting constraint on ({sigma} {center_dot} Br){sub 95}/({sigma} {center_dot} Br){sub SM} is about 4 to 10 for Higgs boson mass between 110 and 200 GeV/c{sup 2}.

Kusakabe, Yoshiaki; /Waseda U.

2006-12-01T23:59:59.000Z

285

Search for the standard model Higgs boson decaying to in the fully leptonic final state in pp collisions at  

SciTech Connect

A search for the standard model Higgs boson decaying to W+W- in pp collisions at sqrt(s) = 7 TeV is reported. The data are collected at the LHC with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. The W+W- candidates are selected in events with two charged leptons and large missing transverse energy. No significant excess of events above the standard model background expectations is observed, and upper limits on the Higgs boson production relative to the standard model Higgs expectation are derived. The standard model Higgs boson is excluded in the mass range 129-270 GeV at 95% confidence level.

Chatrchyan, Serguei; et al.

2012-03-01T23:59:59.000Z

286

Unusual charged Higgs boson signals at CERN LEP 2  

Science Journals Connector (OSTI)

We have made a detailed study of the signals expected at CERN LEP 2 from charged scalar bosons whose dominant decay channels are into four fermions. The event rates as well as kinematics of the final states are discussed when such scalars are either pair produced or are generated through a tree-level interaction involving a charged scalar, the W, and the Z. The backgrounds in both cases are discussed. We also suggest the possibility of reconstructing the mass of such a scalar at LEP 2.

Dilip Kumar Ghosh, Rohini M. Godbole, and Biswarup Mukhopadhyaya

1997-03-01T23:59:59.000Z

287

Searches for heavy scalar and pseudoscalar Higgs bosons and for flavor-violating decays of the top quark into a Higgs boson in $\\mathrm{p}\\mathrm{p}$ collisions at $\\sqrt{s}$ = 8 TeV  

E-Print Network (OSTI)

Searches are presented for heavy scalar ($\\mathrm{H}$) and pseudoscalar ($\\mathrm{A}$) Higgs bosons posited in the two doublet model (2HDM) extensions of the standard model (SM). These searches are based on a data sample of $\\mathrm{p}\\mathrm{p}$ collisions collected with the CMS experiment at the LHC at a center-of-mass energy of $\\sqrt{s} = 8~\\mathrm{TeV}$ and corresponding to an integrated luminosity of $19.5~\\mathrm{fb}^{-1}$. The decays $\\mathrm{H} \\rightarrow \\mathrm{h} \\mathrm{h}$ and $\\mathrm{A} \\rightarrow \\mathrm{Z} \\mathrm{h}$, where $\\mathrm{h}$ denotes an SM-like Higgs boson, lead to events with three or more isolated charged leptons or with a photon pair accompanied by one or more isolated leptons. The search results are presented in terms of the $\\mathrm{H}$ and $\\mathrm{A}$ production cross sections times branching fractions and are further interpreted in terms of 2HDM parameters. We place 95% CL cross section upper limits of approximately $7~\\mathrm{pb}$ on $\\sigma \\mathcal{B}$ for $\\mathrm{H...

Khachatryan, Vardan; Tumasyan, Armen; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko; Erö, Janos; Fabjan, Christian; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hartl, Christian; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knünz, Valentin; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Herbert; Schöfbeck, Robert; Strauss, Josef; Taurok, Anton; Treberer-Treberspurg, Wolfgang; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Alderweireldt, Sara; Bansal, Monika; Bansal, Sunil; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Knutsson, Albert; Luyckx, Sten; Ochesanu, Silvia; Roland, Benoit; Rougny, Romain; Van De Klundert, Merijn; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Daci, Nadir; Heracleous, Natalie; Keaveney, James; Lowette, Steven; Maes, Michael; Olbrechts, Annik; Python, Quentin; Strom, Derek; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Caillol, Cécile; Clerbaux, Barbara; De Lentdecker, Gilles; Dobur, Didar; Favart, Laurent; Gay, Arnaud; Grebenyuk, Anastasia; Léonard, Alexandre; Mohammadi, Abdollah; Perniè, Luca; Reis, Thomas; Seva, Tomislav; Thomas, Laurent; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Adler, Volker; Beernaert, Kelly; Benucci, Leonardo; Cimmino, Anna; Costantini, Silvia; Crucy, Shannon; Dildick, Sven; Fagot, Alexis; Garcia, Guillaume; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Salva Diblen, Sinem; Sigamani, Michael; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Beluffi, Camille; Bruno, Giacomo; Castello, Roberto; Caudron, Adrien; Ceard, Ludivine; Da Silveira, Gustavo Gil; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Nuttens, Claude; Pagano, Davide; Perrini, Lucia; Pin, Arnaud; Piotrzkowski, Krzysztof; Popov, Andrey; Quertenmont, Loic; Selvaggi, Michele; Vidal Marono, Miguel; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Aldá Júnior, Walter Luiz; Alves, Gilvan; Brito, Lucas; Correa Martins Junior, Marcos; Dos Reis Martins, Thiago; Mora Herrera, Clemencia; Pol, Maria Elena; Carvalho, Wagner; Chinellato, Jose; Custódio, Analu; Da Costa, Eliza Melo; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Malbouisson, Helena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santaolalla, Javier; Santoro, Alberto; Sznajder, Andre; Tonelli Manganote, Edmilson José; Vilela Pereira, Antonio; Bernardes, Cesar Augusto; Dogra, Sunil; Tomei, Thiago; De Moraes Gregores, Eduardo; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Aleksandrov, Aleksandar; Genchev, Vladimir; Iaydjiev, Plamen; Marinov, Andrey; Piperov, Stefan; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Tcholakov, Vanio; Vutova, Mariana; Dimitrov, Anton; Glushkov, Ivan; Hadjiiska, Roumyana; Kozhuharov, Venelin; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Chen, Mingshui; Du, Ran; Jiang, Chun-Hua; Liang, Song; Plestina, Roko; Tao, Junquan; Wang, Xianyou; Wang, Zheng; Asawatangtrakuldee, Chayanit; Ban, Yong; Guo, Yifei; Li, Qiang; Li, Wenbo; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Wang, Dayong; Zhang, Linlin; Zou, Wei; Avila, Carlos; Chaparro Sierra, Luisa Fernanda; Florez, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Kadija, Kreso; Luetic, Jelena; Mekterovic, Darko; Sudic, Lucija; Attikis, Alexandros; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Bodlak, Martin; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; Ellithi Kamel, Ali; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Murumaa, Marion; Raidal, Martti; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko; Härkönen, Jaakko; Karimäki, Veikko; Kinnunen, Ritva; Kortelainen, Matti J; Lampén, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindén, Tomas; Luukka, Panja-Riina; Mäenpää, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Wendland, Lauri; Tuuva, Tuure

2014-01-01T23:59:59.000Z

288

Composite bosonic baryon dark matter on the lattice: SU(4) baryon spectrum and the effective Higgs interaction  

E-Print Network (OSTI)

We present the spectrum of baryons in a new SU(4) gauge theory with fundamental fermion constituents. The spectrum of these bosonic baryons is of significant interest for composite dark matter theories. Here, we compare the spectrum and properties of SU(3) and SU(4) baryons, and then compute the dark-matter direct detection cross section via Higgs boson exchange for TeV-scale composite dark matter arising from a confining SU(4) gauge sector. Comparison with the latest LUX results leads to tight bounds on the fraction of the constituent-fermion mass that may arise from electroweak symmetry breaking. Lattice calculations of the dark matter mass spectrum and the Higgs-dark matter coupling are performed on quenched $16^{3} \\times 32$, $32^{3} \\times 64$, $48^{3} \\times 96$, and $64^{3} \\times128$ lattices with three different lattice spacings, using Wilson fermions with moderate to heavy pseudoscalar meson masses. Our results lay a foundation for future analytic and numerical study of composite baryonic dark matter.

Thomas Appelquist; Evan Berkowitz; Richard C. Brower; Michael I. Buchoff; George T. Fleming; Joe Kiskis; Graham D. Kribs; Meifeng Lin; Ethan T. Neil; James C. Osborn; Claudio Rebbi; Enrico Rinaldi; David Schaich; Chris Schroeder; Sergey Syritsyn; Gennady Voronov; Pavlos Vranas; Evan Weinberg; Oliver Witzel

2014-02-26T23:59:59.000Z

289

Search for the standard model Higgs boson produced in association with a W or a Z boson and decaying to bottom quarks  

E-Print Network (OSTI)

A search for the standard model Higgs boson (H) decaying to b b-bar when produced in association with a weak vector boson (V) is reported for the following channels: W(mu nu)H, W(e nu)H, W(tau nu)H, Z(mu mu)H, Z(e e)H, and Z(nu nu)H. The search is performed in data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at sqrt(s) = 7 TeV and up to 18.9 inverse femtobarns at sqrt(s) = 8 TeV, recorded by the CMS experiment at the LHC. An excess of events is observed above the expected background with a local significance of 2.1 standard deviations for a Higgs boson mass of 125 GeV, consistent with the expectation from the production of the standard model Higgs boson. The signal strength corresponding to this excess, relative to that of the standard model Higgs boson, is 1.0 +/- 0.5.

CMS Collaboration

2014-02-14T23:59:59.000Z

290

Search for the standard model Higgs boson produced in association with a standard W or a Z boson and decaying to bottom quarks  

SciTech Connect

A search for the standard model Higgs boson (H) decaying to b b-bar when produced in association with a weak vector boson (V) is reported for the following channels: W(mu nu)H, W(e nu)H, W(tau nu)H, Z(mu mu)H, Z(e e)H, and Z(nu nu)H. The search is performed in data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at sqrt(s) = 7 TeV and up to 18.9 inverse femtobarns at sqrt(s) = 8 TeV, recorded by the CMS experiment at the LHC. An excess of events is observed above the expected background with a local significance of 2.1 standard deviations for a Higgs boson mass of 125 GeV, consistent with the expectation from the production of the standard model Higgs boson. The signal strength corresponding to this excess, relative to that of the standard model Higgs boson, is 1.0 +/- 0.5.

Chatrchyan, Serguei; et al.,

2014-01-21T23:59:59.000Z

291

Search for H ? ?? produced in association with top quarks and constraints on the Yukawa coupling between the top quark and the Higgs boson using data taken at 7 TeV and 8 TeV with the ATLAS detector  

E-Print Network (OSTI)

A search is performed for Higgs bosons produced in association with top quarks using the diphoton decay mode of the Higgs boson. Selection requirements are optimized separately for leptonic and fully hadronic final states ...

Taylor, Frank E.

292

Search for Higgs Boson Production in Association with a W Boson in 1.96-TeV Proton - Antiproton Collisions  

SciTech Connect

We have searched for the Standard Model Higgs boson production in association with a W{sup {+-}} boson. This search is based on the data collected between February 2002 and May 2007, corresponding to an integrated luminosity of 1.9 fb{sup -1} collected by the Collider Detector at Fermilab (CDF) at the Tevatron which is a p{bar p} collider at a center of mass energy 1.96 TeV. W+Higgs channel is one of the most promising channels for the Higgs search at Tevatron in the low Higgs mass region (m{sub H} < 135 GeV/c{sup 2}), where Higgs boson decays into b{bar b} dominantly. The detection of lepton from the W boson decay makes the W+Higgs events much cleaner than the direct Higgs production events which have the largest production cross section. Experimentally we select events with a high p{sub T} lepton, high missing transverse energy and two b-quark jets. This signature is same as for the W+jets background which has a huge cross section. To reduce the W+jets background, b-jet identification algorithms are applied to at least one jet. The expected signal events in 1.9fb{sup -1} are 1.82 {+-} 0.15 and 1.68 {+-} 0.20 for one b-tagged events and two b-tagged events, respectively. The observed data is 805 for one b-tagged events and 173 for two b-tagged events. They are consistent with the Standard Model background expectation. After selecting the events, Neural Network (NN) discriminant technique is performed to distinguish the signal events from still residual backgrounds. We see no evidence for a Higgs signal in the dijet mass distribution and in the NN output distribution. We set a 95% confidence level upper limit on the W+Higgs production cross section times the branching ratio of the Higgs decaying into a b{bar b} pair. We obtained {sigma}(p{bar p} {yields} W{sup {+-}}H) x BR(H {yields} b{bar b}) < 1.4 to 0.9 pb for Higgs masses from 110 GeV/c{sup 2} to 150 GeV/c{sup 2} using the NN output distribution. The limits are about 10 times higher than the Standard Model expectation in the low Higgs mass region.

Masubuchi, Tatusya; /Tsukuba U.

2008-02-01T23:59:59.000Z

293

New mechanism for neutrino mass generation and triply charged Higgs bosons at the LHC  

SciTech Connect

We propose a new mechanism for generating small neutrino masses which predicts the relation m{sub {nu}}{approx}v{sup 4}/M{sup 3}, where v is the electroweak scale, rather than the conventional seesaw formula m{sub {nu}}{approx}v{sup 2}/M. Such a mass relation is obtained via effective dimension seven operators LLHH(H{sup {dagger}}H)/M{sup 3}, which arise when an isospin 3/2 Higgs multiplet {phi} is introduced along with isotriplet leptons. The masses of these particles are naturally in the TeV scale. The triply charged Higgs boson contained in {phi} can be pair produced at the LHC and the Tevatron, with {phi}{sup +++} decaying into W{sup +}l{sup +}l{sup +} or W{sup +}W{sup +}W{sup +}, possibly with displaced vertices. The leptonic decays of {phi}{sup +++} will help discriminate between normal and inverted hierarchies of neutrino masses. This scenario also allows for raising the standard Higgs boson mass to values in excess of 500 GeV.

Babu, K. S.; Nandi, S.; Tavartkiladze, Zurab [Department of Physics and Oklahoma Center for High Energy Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)

2009-10-01T23:59:59.000Z

294

Effective Interaction of Electroweak-Interacting Dark Matter with Higgs Boson and Its Phenomenology  

E-Print Network (OSTI)

We study phenomenology of electroweak-interacting fermionic dark matter (DM) with a mass of $\\mathcal{O}(100)$ GeV. Constructing the effective Lagrangian that describes the interactions between the Higgs boson and the SU(2)$_L$ isospin multiplet fermion, we evaluate the electric dipole moment (EDM) of electron, the signal strength of Higgs boson decay to two photons and the spin-independent elastic-scattering cross section with proton. As representative cases, we consider the SU(2)$_L$ triplet fermions with zero/nonzero hypercharges and SU(2)$_L$ doublet fermion. It is found that the electron EDM gives stringent constraints on those model parameter spaces. In the cases of the triplet fermion with zero hypercharge and the doublet fermion, the Higgs signal strength does not deviate from the standard model prediction by more than a few % once the current DM direct detection constraint is taken into account, even if the CP violation is suppressed. On the contrary, $\\mathcal{O}(10$-$20)$ % deviation may occur in t...

Hisano, Junji; Mori, Naoya; Senaha, Eibun

2014-01-01T23:59:59.000Z

295

Search for the dark photon and the dark Higgs boson at Belle  

E-Print Network (OSTI)

The dark photon, $A^\\prime$, and the dark Higgs boson, $h^\\prime$, are hypothetical constituents featured in a number of recently proposed Dark Sector Models. Assuming prompt decays of both dark particles, we search for their production in the so-called Higgs-strahlung channel, $e^+e^- \\rightarrow A^\\prime h'$, with $h^\\prime \\rightarrow A^\\prime A^\\prime$. We investigate ten exclusive final-states with $A^\\prime \\rightarrow e^+e^-$, $\\mu^+\\mu^-$, or $\\pi^+\\pi^-$, in the mass ranges $0.1$~GeV/$c^2$~$section, $\\cal B \\times \\sigma_{\\mathrm{Born}}$, on the Born cross section, $\\sigma_{\\mathrm{Born}}$, and on the dark photon coupling to the dark Higgs boson times the kinetic mixing between the Standard Model photon and the dark photon, $\\alpha_D \\times \\epsilon^2$. These limits improve upon and cover wider mass ranges than previous experiments. The limits from the final-states $3(\\pi^+\\pi^-)$ and $2(e^+e^-)X$ are the first placed by any experiment. For $\\alpha_D$ equal to 1/137, $m_{h'}<$ 8 GeV/$c^2$, and $m_{A^\\prime}<$ 1 GeV/$c^2$, we exclude values of the mixing parameter, $\\epsilon$, above $\\sim 8 \\times 10^{-4}$.

The Belle Collaboration

2015-01-31T23:59:59.000Z

296

What is the origin of the mass of the Higgs boson?  

E-Print Network (OSTI)

The purpose of this paper is to present a unified description of mass generation mechanisms that have been investigated so far and that are called the Mach and Higgs proposals. In our mechanism, gravity acts merely as a catalyst and the final expression of the mass depends neither on the intensity nor on the particular properties of the gravitational field. We shall see that these two strategies to provide mass for all bodies that operate independently and competitively can be combined into a single unified theoretical framework. As a consequence of this new formulation we are able to present an answer to the question: what is the origin of the mass of the Higgs boson?

M. Novello; E. Bittencourt

2012-09-21T23:59:59.000Z

297

Bounds on Invisible Higgs boson Decays from $t\\bar{t}H$ Production  

E-Print Network (OSTI)

We present an upper bound on the branching fraction of the Higgs boson to invisible particles, by recasting a CMS search for stop quarks decaying to $t\\bar{t}+\\missET$. The observed (expected) bound, BF($H\\rightarrow$inv.$)<0. 40 (0.65)$ at 95\\% CL, is the strongest direct limit to date, benefiting from a downward fluctuation in the CMS data in that channel. In addition, we combine this new constraint with existing published constraints to give an observed (expected) bound of BF($H\\rightarrow$inv.$)<0. 40 (0.40)$ at 95\\% CL, and show some of the implications for theories of dark matter which communicate through the Higgs portal.

Ning Zhou; Zepyoor Khechadoorian; Daniel Whiteson; Tim Tait

2014-07-31T23:59:59.000Z

298

Dark photons and resonant monophoton signatures in Higgs boson decays at the LHC  

E-Print Network (OSTI)

Motivated by dark-photon $\\bar{\\gamma}$ scenarios extensively considered in the literature, we explore experimentally allowed models where the Higgs boson coupling to photon and dark photon $H\\gamma\\bar{\\gamma}$ can be enhanced. Correspondingly, large rates for the $H\\to \\gamma\\bar \\gamma$ decay become plausible, giving rise to one monochromatic photon with $E^{\\gamma}\\simeq m_H/2$ (i.e., more than twice the photon energy in the rare standard-model decay $H\\to \\gamma Z\\to\\gamma\\bar\

Emidio Gabrielli; Matti Heikinheimo; Barbara Mele; Martti Raidal

2014-09-23T23:59:59.000Z

299

From the Cosmological Constant: Higgs Boson, Dark Matter, and Quantum Gravity Scales  

E-Print Network (OSTI)

We suggest discovery targets for the Higgs boson, dark matter, and quantum gravity mass scales, motivated by the Dirac equation for the electron in deSitter space, and a sixth-order constraint between the electron QED parameters and the cosmological constant. We go on to show that this constraint can be viewed as a structural parameter of the electron, and leads naturally to a new cosmic horizon. A dual fourth-order constraint implies a second-order one, from which the electron neutrino mass is derived.

James R. Bogan

2009-02-16T23:59:59.000Z

300

The search for the Higgs boson in tauon pairs at the ATLAS experiment.  

E-Print Network (OSTI)

??The combined results have excluded most Higgs masses between 110 and 500 GeV. The only region that is not excluded is at mH = 126… (more)

Shao, Qi Tao

2013-01-01T23:59:59.000Z

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301

Introduction to HOBIT, a b-jet identification tagger at the CDF experiment optimized for light Higgs boson searches  

Science Journals Connector (OSTI)

We present the development and validation of the Higgs Optimized b Identification Tagger (HOBIT), a multivariate b-jet identification algorithm optimized for Higgs boson searches at the CDF experiment at the Fermilab Tevatron. At collider experiments, b taggers allow one to distinguish particle jets containing B hadrons from other jets; these algorithms have been used for many years with great success at CDF. HOBIT has been designed specifically for use in searches for light Higgs bosons decaying via H ? b b ¯ . This fact combined with the extent to which HOBIT synthesizes and extends the best ideas of previous taggers makes HOBIT unique among CDF b-tagging algorithms. Employing feed-forward neural network architectures, HOBIT provides an output value ranging from approximately ?1 (“light-jet like”) to 1 (“b-jet like”); this continuous output value has been tuned to provide maximum sensitivity in light Higgs boson search analyses. When tuned to the equivalent light jet rejection rate, HOBIT tags 54% of b jets in Monte Carlo simulated Higgs boson events (mH=120 GeV/c2) compared to 39% for SecVtx, the most commonly used b tagger at CDF. We present features of the tagger as well as its characterization in the form of b-jet finding efficiencies and false (light-jet) tag rates.

J. Freeman; T. Junk; M. Kirby; Y. Oksuzian; T.J. Phillips; F.D. Snider; M. Trovato; J. Vizan; W.M. Yao

2013-01-01T23:59:59.000Z

302

Probing doubly charged Higgs bosons in e{sup +}e{sup -} colliders at the ILC and the CLIC in a 3-3-1 model  

SciTech Connect

The SU(3){sub L} x U(1){sub N} electroweak model predicts new Higgs bosons beyond the one of the standard model. In this work we investigate the signature and production of doubly charged Higgs bosons in the e{sup -}e{sup +} International Linear Collider and in the CERN Linear Collider. We compute the branching ratios for the doubly charged gauge bosons of the model.

Cieza Montalvo, J. E. [Instituto de Fisica, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20559-900 Rio de Janeiro, RJ (Brazil); Cortez, Nelson V. [Rua Justino Boschetti 40, 02205-050 Sao Paulo, SP (Brazil); Tonasse, M. D. [Unidade de Registro, Campus Experimental de Registro, Universidade Estadual Paulista, Rua Nelson Brihi Badur 430, 11900-000 Registro, SP (Brazil)

2008-12-01T23:59:59.000Z

303

Search for invisibly decaying Higgs bosons in e+e- -> Zoho production at sqrt(s) = 183 - 209 GeV  

E-Print Network (OSTI)

A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Zo boson in e+e- collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb-1. The analysis aims to select events containing the hadronic decay products of the Zo boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Zo boson are derived. Assuming a branching ratio BR(ho->invisible)=1, a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained.

The OPAL collaboration

2007-07-03T23:59:59.000Z

304

Higgs boson pair production in the D=6 extension of the SM  

E-Print Network (OSTI)

We derive the constraints that can be imposed on the dimension-6 effective theory extension of the Standard Model, using gluon-fusion-initiated Higgs boson pair production at the LHC. We use a realistic analysis focussing on the $hh \\rightarrow (b\\bar{b}) ( \\tau^+ \\tau^- )$ final state, including initial-state radiations and non-perturbative effects. We include conservative estimates of the theoretical uncertainties on the signal rate predictions as well as the statistical uncertainties. We first consider a theory containing only modifications of the trilinear coupling through an $c_6 \\lambda\\, H^6/ \\Lambda^2$ Lagrangian term, and then examine the full parameter space of the effective theory, incorporating current bounds obtained through single Higgs boson measurements. We also consider a simplified scenario, where we only allow a sub-set of parameters to vary and set the others to zero. We find that the currently unbounded parameter, $c_6$, could be constrained to lie within $-0.9 \\lesssim c_6 \\lesssim 1.7$ ...

Goertz, Florian; Yang, Li Lin; Zurita, José

2014-01-01T23:59:59.000Z

305

Natural predictions for the Higgs boson mass and supersymmetric contributions to rare processes  

Science Journals Connector (OSTI)

In the context of No-Scale F - SU ( 5 ) , a model defined by the convergence of the F -lipped SU ( 5 ) Grand Unified Theory, two pairs of hypothetical TeV scale vector-like supersymmetric multiplets with origins in F -theory, and the dynamically established boundary conditions of No-Scale Supergravity, we predict that the lightest CP-even Higgs boson mass lies within the range of 119.0 GeV to 123.5 GeV, exclusive of the vector-like particle contribution to the mass. With reports by the CMS, ATLAS, CDF, and DØ Collaborations detailing enticing statistical excesses in the vicinity of 120 GeV in searches for the Standard Model Higgs boson, all signs point to an imminent discovery. While basic supersymmetric constructions such as mSUGRA and the CMSSM have already suffered overwhelming reductions in viable parameterization during the LHC?s initial year of operation, about 80% of the original No-Scale F - SU ( 5 ) model space remains viable after analysis of the first 1.1 fb ? 1 of integrated luminosity. This model is moreover capable of handily explaining the small excesses recently reported in the CMS multijet supersymmetry search, and also features a highly favorable “golden” subspace which may simultaneously account for the key rare process limits on the muon anomalous magnetic moment ( g ? 2 ) ? and the branching ratio of the flavor-changing neutral current decay b ? s ? . In addition, the isolated mass parameter responsible for the global particle mass normalization, the gaugino boundary mass M 1 / 2 , is dynamically determined at a secondary local minimization of the minimum of the Higgs potential V min , in a manner which is deeply consistent with all precision measurements at the physical electroweak scale.

Tianjun Li; James A. Maxin; Dimitri V. Nanopoulos; Joel W. Walker

2012-01-01T23:59:59.000Z

306

LHC upgrades could reveal whether Higgs boson is 'standard'  

Science Journals Connector (OSTI)

... . That’s the drift from the latest measurements at CERN’s Large Hadron Collider (LHC), where physicists have been carefully characterizing the new particle they discovered in 2012. ... the most recent results show no sign of such interference, the next phase of the LHC could offer new insights; it is set to start operating at higher energies in ...

Clara Moskowitz

2014-06-27T23:59:59.000Z

307

Dark matter in the inert doublet model after the discovery of a Higgs-like boson at the LHC  

Science Journals Connector (OSTI)

We examine the Inert Doublet Model in light of the discovery of a Higgs-like boson with a mass of roughly 126 GeV at the LHC. We evaluate one-loop corrections to the scalar masses and perform a numerical solut...

A. Goudelis; B. Herrmann; O. Stål

2013-09-01T23:59:59.000Z

308

Combination of Tevatron Searches for the Standard Model Higgs Boson in the W(+)W(?) Decay Mode  

E-Print Network (OSTI)

We combine searches by the CDF and D0 Collaborations for a Higgs boson decaying to W(+)W(?). The data correspond to an integrated total luminosity of 4.8 (CDF) and 5.4 (D0) fb(?1) of pp-bar collisions at s?=1.96??TeV at the Fermilab Tevatron...

Baringer, Philip S.; Bean, Alice; Clutter, Justace Randall; McGivern, Carrie Lynne; Moulik, Tania; Aaltonen, T.; Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.

2010-02-12T23:59:59.000Z

309

Search for di-muon decays of a low-mass Higgs boson in radiative decays of the ?(1S)  

E-Print Network (OSTI)

We search for di-muon decays of a low-mass Higgs boson (A[superscript 0]) produced in radiative ?(1S) decays. The ?(1S) sample is selected by tagging the pion pair in the ?(2S,3S)??[superscript +]?[superscript -]?(1S) ...

Cowan, Ray Franklin

310

Search for the standard model Higgs boson decaying into two photons in pp collisions at ?s = 7 TeV  

E-Print Network (OSTI)

A search for a Higgs boson decaying into two photons is described. The analysis is performed using a dataset recorded by the CMS experiment at the LHC from pp collisions at a center-of-mass energy of 7 TeV, which corresponds ...

CMS Collaboration

311

Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector  

E-Print Network (OSTI)

A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 5.4 fb$^{-1}$ of proton-proton collisions data at $\\sqrt{s}=7$ TeV and 20.3 fb$^{-1}$ at $\\sqrt{s}=8$ TeV collected by the ATLAS detector at the Large Hadron Collider. The number of observed Higgs boson decays to diphotons divided by the corresponding Standard Model prediction, called the signal strength, is found to be $\\mu = 1.17 \\pm 0.27$ at the value of the Higgs boson mass measured by ATLAS, $m_{H}$ = 125.4 GeV. The analysis is optimized to measure the signal strengths for individual Higgs boson production processes at this value of $m_{H}$. They are found to be $\\mu_{\\mathrm{ggF}} = 1.32 \\pm 0.38$, $\\mu_{\\mathrm{VBF}} = 0.8 \\pm 0.7$, $\\mu_{{WH}} = 1.0 \\pm 1.6 $, $\\mu_{{ZH}} = 0.1 ^{+3.7}_{-0.1} $, $\\mu_{{t\\bar{t}H}} = 1.6 ^{+2.7}_{-1.8} $, for Higgs boson production through gluon fusion, vector-boson fusion, and in association with a $W$ or $Z$ boson or a top-quark pair, respectively. Compared with the previously published ATLAS analysis, the results reported here also benefit from a new energy calibration procedure for photons and the subsequent reduction of the systematic uncertainty on the diphoton mass resolution. No significant deviations from the predictions of the Standard Model are found.

ATLAS Collaboration

2014-09-09T23:59:59.000Z

312

Search for a Higgs Boson in the Diphoton Final State in p-pbar Collisions at ?s = 1.96 TeV  

A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 7.0 fb-1 of integrated luminosity from pp? collisions at ?s = 1.96 TeV collected by the CDF experiment. No evidence of such a resonance is observed, and upper limits are set on the cross section times branching ratio of the resonant state as a function of Higgs boson mass. The limits are interpreted in the context of the standard model and one fermiophobic benchmark model where the data exclude fermiophobic Higgs bosons with masses below 114 GeV/c2 at a 95% Bayesian credibility level.

Aaltonen, T.; Gonzalez, B.Alvarez; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A.; Antos, J.; Apollinari, G.; Appel, J.A.; Apresyan, A.; Arisawa, T.

2012-01-01T23:59:59.000Z

313

Search for Higgs boson production in oppositely charged dilepton and missing energy events in pp¯ collisions at s=1.96??TeV  

Science Journals Connector (OSTI)

We present a search for the standard model Higgs boson using events with two oppositely charged leptons and large missing transverse energy as expected in H?WW decays. The events are selected from data corresponding to 8.6??fb-1 of integrated luminosity in pp¯ collisions at s=1.96??TeV collected with the D0 detector at the Fermilab Tevatron Collider. No significant excess above the standard model background expectation in the Higgs boson mass range this search is sensitive to is observed, and upper limits on the Higgs boson production cross section are derived.

V. M. Abazov et al. (The D0 Collaboration)

2012-08-20T23:59:59.000Z

314

Diphoton decay of the Higgs boson and new bound states of top and anti-top quarks  

E-Print Network (OSTI)

We consider the constraints, provided by the LHC results on Higgs boson decay into 2 photons and its production via gluon fusion, on the previously proposed Standard Model (SM) strongly bound state $S$ of 6 top quarks and 6 anti-top quarks. A correlation is predicted between the ratios $\\kappa_{\\gamma}$ and $\\kappa_g$ of the Higgs diphoton decay and gluon production amplitudes respectively to their SM values. We estimate the contribution to these amplitudes from one loop diagrams involving the 12 quark bound state $S$ and related excited states using an atomic physics based model. We find two regions of parameter space consistent with the ATLAS and CMS data on ($\\kappa_{\\gamma}$, $\\kappa_g$) at the 3 sigma level: a region close to the SM values ($\\kappa_{\\gamma}=1$, $\\kappa_g =1$) with the mass of the bound state $m_S > 400$ GeV and a region with ($\\kappa_{\\gamma} \\sim 3/2$, $\\kappa_g \\sim -3/4$) corresponding to a bound state mass of $m_S \\sim 220$ GeV.

Froggatt, C D; Laperashvili, L V; Nielsen, H B

2015-01-01T23:59:59.000Z

315

Search for standard model Higgs bosons decaying to w-boson pairs in proton-anti-proton collisions at s**(1/2) = 1.96 TeV  

SciTech Connect

This thesis describes a search for standard model Higgs bosons decaying to W boson pairs in proton-anti-proton collisions at a center of mass energy of 1.96 TeV using the CDF II detector. The decay to W bosons is dominant for Higgs masses greater than about 135 GeV. The final state examined consists of two leptons and missing transverse energy from the leptonic decay of one or more W bosons. The signal production mechanisms included are gluon fusion, associated production with a W or Z boson, and vector boson fusion. Matrix element calculations and artificial neural networks are used to discriminate signal from background for Higgs masses in the range 110 {le} M{sub H} {le} 200 GeV. No significant excess of events is observed at any of the Higgs masses investigated. Upper limits on the standard model Higgs cross section are set at 95% confidence for each Higgs mass investigated, the most stringent limit being 1.63 times the predicted standard model cross section for a Higgs mass of 160 GeV.

Hidas, Dean Andrew; /Duke U.

2008-12-01T23:59:59.000Z

316

Measurement of the ZZ production cross section and search for the standard model Higgs boson in the four lepton final state in pp¯ collisions  

Science Journals Connector (OSTI)

We present a measurement of Z boson pair production in pp¯ collisions at 1.96 TeV with 9.6 to 9.8??fb-1 of D0 data. We examine the final states eeee, ee??, and ????. Based on selected data, the measured cross section in the mass region M(Z/?*)>30??GeV is ?(pp¯?Z/?*Z/?*)=1.26-0.36+0.44(stat)-0.15+0.17(syst)±0.08(lumi)??pb; after correcting for the expected ratio of ?(pp¯?Z/?*Z/?*) to ?(pp¯?ZZ), we derive a cross section for pp¯?ZZ production of 1.05-0.30+0.37(stat)-0.12+0.14(syst)±0.06(lumi)??pb. This result is combined with a previous result from the ZZ??+?-??¯ channel resulting in a combined pp¯?ZZ cross section measurement of 1.32-0.25+0.29(stat)±0.12(syst)±0.04(lumi)??pb. These measurements are consistent with the standard model expectation of 1.43±0.10??pb. We extend this analysis to search for the standard model (SM) Higgs boson between 115 and 200 GeV. At a Higgs boson mass of 125 GeV, we expect to set a limit of 43 times the SM expectation at 95% C.L., and set a limit of 42 times the SM expectation at 95% C.L.

V. M. Abazov et al. (D0 Collaboration)

2013-08-15T23:59:59.000Z

317

Search for the dark photon and the dark Higgs boson at Belle  

E-Print Network (OSTI)

The dark photon, $A^\\prime$, and the dark Higgs boson, $h^\\prime$, are hypothetical constituents featured in a number of recently proposed Dark Sector Models. Assuming prompt decays of both dark particles, we search for their production in the so-called Higgs-strahlung channel, $e^+e^- \\rightarrow A^\\prime h'$, with $h^\\prime \\rightarrow A^\\prime A^\\prime$. We investigate ten exclusive final-states with $A^\\prime \\rightarrow e^+e^-$, $\\mu^+\\mu^-$, or $\\pi^+\\pi^-$, in the mass ranges $0.1$~GeV/$c^2$~$< m_{A^\\prime} < 3.5$~GeV/$c^2$ and $0.2$~GeV/$c^2$~$< m_{h'} < 10.5$~GeV/$c^2$. We also investigate three inclusive final-states, $2(e^+e^-)X$, $2(\\mu^+\\mu^-)X$, and $(e^+e^-)(\\mu^+\\mu^-)X$, where $X$ denotes a dark photon candidate detected via missing mass, in the mass ranges $1.1$~GeV/$c^2$~$< m_{A^\\prime} < 3.5$~GeV/$c^2$ and $2.2$~GeV/$c^2$~$< m_{h'} < 10.5$~GeV/$c^2$. Using the entire $977\\,\\mathrm{fb}^{-1}$ data set collected by Belle, we observe no significant signal. We obtain ind...

,

2015-01-01T23:59:59.000Z

318

Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at \\( \\sqrt{s}=8 \\) TeV with the ATLAS detector  

Science Journals Connector (OSTI)

A search for the neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is performed on data from proton-proton collisions at a centre-of-mass energy of 8 ...

G. Aad; B. Abbott; J. Abdallah; S. Abdel Khalek…

2014-11-01T23:59:59.000Z

319

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC  

E-Print Network (OSTI)

A search for the Standard Model Higgs boson in proton–proton collisions with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities of approximately 4.8 fb[superscript ?1] ...

Taylor, Frank E.

320

Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at ?s = 8 TeV with ATLAS  

E-Print Network (OSTI)

Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of ?s = 8 TeV. The analysis is performed in the H ? ?? decay channel ...

Taylor, Frank E.

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


321

Search for multi-photon signatures of a Higgs boson in ppbar collisions at sqrt(s) = 1.96 TeV.  

E-Print Network (OSTI)

??We have performed a search for a fermiophobic Higgs boson in tri-photon events. The study has been performed on 0.83 fb-1 of data collected with… (more)

Atramentov, Oleksiy Vladimirovich

2006-01-01T23:59:59.000Z

322

Charged Higgs Boson Studies in the Channel pp?a1h±?4b+l+MET in the Next-to MSSM (NMSSM) with the ATLAS Experiment.  

E-Print Network (OSTI)

?? Next-to-minimal super-symmetric extensions of the Standard Model (SM) predict the existence of several non-SM like Higgs bosons. The process pp?a1h±?4b+W involves the production and… (more)

Zimmer, Stephan

2010-01-01T23:59:59.000Z

323

Search for a Higgs boson in the diphoton final state using the full CDF data set from pp? collisions at ?s = 1.96 TeV  

E-Print Network (OSTI)

A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 10 fb[superscript ?1] of integrated luminosity collected by the CDF experiment from proton–antiproton ...

CDF Collaboration

324

Searches for Electroweak Neutralino and Chargino Production in Channels with Higgs, Z, and W Bosons in pp Collisions at 8 TeV  

E-Print Network (OSTI)

Searches for supersymmetry (SUSY) are presented based on the electroweak pair production of neutralinos and charginos, leading to decay channels with Higgs, Z, and W bosons and undetected lightest SUSY particles (LSPs). ...

Khachatryan, V.

325

Resonant Higgs boson pair production in the $hh\\rightarrow b\\bar{b} \\; WW \\rightarrow b\\bar{b} \\ell^+ \  

E-Print Network (OSTI)

Adding a scalar singlet provides one of the simplest extensions of the Standard Model. In this work we briefly review the latest constraints on the mass and mixing of the new Higgs boson and study its production and decay at the LHC. We mainly focus on double Higgs production in the $hh \\rightarrow b \\bar{b} WW \\rightarrow b \\bar{b} \\ell^+ \

Martin-Lozano, Victor; Park, Chan Beom

2015-01-01T23:59:59.000Z

326

Projections for measurements of Higgs boson signal strengths and coupling parameters with the ATLAS detector at a HL-LHC  

E-Print Network (OSTI)

A study is presented on the ATLAS experimental prospects for measuring Higgs boson signal strengths, and determining couplings to individual fermions and bosons, using 14 TeV proton-proton collisions at the LHC with 300 fb$^{-1}$ and at the HL-LHC with 3000 fb$^{-1}$. This document is released coincident with the 2014 ECFA HL-LHC workshop and contains updates since the 2013 workshop for the $H\\to Z\\gamma$ and $VH/ttH\\to\\gamma\\gamma$ channels. In addition, the prospects for the $VH\\to b\\bar{b}$ channel have now been included in the combination of channels.

The ATLAS collaboration

2014-01-01T23:59:59.000Z

327

Search for MSSM Higgs Boson Production in Di-tau Final States with L = 2.2fb ?1 at the DØ Detector  

E-Print Network (OSTI)

A search for the production of neutral Higgs bosons decaying into ? + ? ? final states is presented in p¯p collisions at a center-of-mass energy of 1.96 TeV. The integrated luminosity used for the study is about 2.2 fb ?1, collected by the DØ Experiment at the Fermilab Tevatron Collider. No significant excess is observed over the background expectation. The results are interpreted in the Minimal Supersymmetric Standard Model (MSSM) and regions in the (mA, tan?) parameter space for two MSSM benchmark scenarios are excluded. 1.

Wan-ching Yang; Dø Collaboration

328

Measurement of the Higgs boson mass from the H ? ZZ? ? 4l and H ? ?? channels with the ATLAS detector at the LHC.  

E-Print Network (OSTI)

This document presents an updated measurement of the Higgs boson mass with the combined fit of two decay channels $H\\rightarrow ZZ^* \\rightarrow4\\ell$ and $H\\rightarrow \\gamma \\gamma$. The analyses are based on $4.5$\\,fb$^{-1}$ and $20.3$\\,fb$^{-1}$ of proton-proton collisions at $\\sqrt{s} = 7$\\,TeV and $\\sqrt{s} = 8$\\,TeV respectively, recorded with the ATLAS detector at the LHC. This result includes improved energy-scale calibrations for photons, electrons, and muons, as well as other analysis improvements.

Gabrielli, Andrea; The ATLAS collaboration

2014-01-01T23:59:59.000Z

329

The pre-LHC Higgs hunt  

Science Journals Connector (OSTI)

...and beyond the discovery of the Higgs boson. organised and edited by John...and beyond the discovery of the Higgs boson . Enormous efforts at accelerators...the search for the long-sought Higgs boson, postulated almost five decades...

2015-01-01T23:59:59.000Z

330

Heavy WIMP through Higgs portal at the LHC  

E-Print Network (OSTI)

LHC constraints on Higgs-portal WIMPs are studied. Scalar, vector and anti-symmetric tensor fields are considered. They are assumed to be heavier than a half of the Higgs boson mass. We investigate 8 TeV LHC results on signatures of the vector boson fusion, mono-jet and associated production of the $Z$ boson, which proceed via virtual exchange of the Higgs boson. We show that Higgs-portal interactions of the vector and tensor WIMPs are constrained to be less than 0.43 and 0.16, respectively, while those for the scalar are very weak. Prospects of the 14 TeV LHC are also discussed.

Motoi Endo; Yoshitaro Takaesu

2014-07-25T23:59:59.000Z

331

First Measurements of the Differential Cross Sections of Higgs Boson Production and Decay in the Four Lepton Final State  

E-Print Network (OSTI)

The discovery of a new scalar particle in the search for the Higgs boson at the Large Hadron Collider (LHC) was a great success for the ATLAS and CMS collaborations. Additional measurements of this new particle present opportunities to both test the Standard Model (SM) predictions for the Higgs boson and to search for non-SM properties of this new particle. This thesis presents measurements of the mass, signal strength, and production cross sections of the Higgs boson in the $H \\rightarrow ZZ^{(*)} \\rightarrow \\ell\\ell\\ell'\\ell' $($\\ell,\\ell'=e,\\mu$) decay channel. The cross section measurements are performed using 20.3 fb$^{-1}$ of $pp$ collisions at center of mass energy $\\sqrt{s}=8$ TeV collected by the ATLAS detector and the mass and signal strength measurements are performed using an additional 4.5 fb$^{-1}$ of $pp$ collisions at $\\sqrt{s}=7$ TeV. From the data in the $H \\rightarrow4\\ell$ channel, the best estimate of the mass is $124.51~\\pm~0.52~\\rm{(stat)}~\\pm 0.06~\\rm{(syst)}$ GeV. The signal str...

Stahlman, Jonathan Mark

332

Search for Higgs Bosons and Supersymmetric Particles in Tau Final States  

SciTech Connect

Elementary particle physics tries to find an answer to no minor question: What is our universe made of? To our current knowledge, the elementary constituents of matter are quarks and leptons, which interact via four elementary forces: electromagnetism, strong force, weak force and gravity. All forces, except gravity, can be described in one framework, the Standard Model of particle physics. The model's name reflects its exceptional success in describing all available experimental high energy physics data to high precision up to energies of about 100 GeV. An exception is given by the neutrino masses but even these can be integrated into the model. The Standard Model is based on the requirement of invariance of all physics processes under certain fundamental symmetry transformations. The consideration of these symmetries leads naturally to the correct description of the electromagnetic, weak and strong forces as the exchange of interaction particles, the gauge bosons. However, this formalism has the weakness that it only allows for massless particles. In order to obey the symmetries, a way to introduce the particle masses is given by the Higgs mechanism, which predicts the existence of the only particle of the Standard Model which has yet to be observed: the Higgs boson. In spite of the success of the Standard Model, it has to be considered as a low energy approximation of a more profound theory for various reasons. For example, the underlying theory is expected to allow for an integration of gravity into the framework and to provide a valid particle candidate for the dark matter in our universe. Furthermore, a solution has to be found to the problem that the Higgs boson as a fundamental scalar is sensitive to large radiative corrections driving its mass to the Planck scale of 10{sup 19} GeV. Several models have been proposed to address the remaining open questions of the Standard Model. Currently, the most promising extension of the Standard Model is Supersymmetry, which provides elegant solutions to the named problems by introducing a supersymmetric partner to each Standard Model particle. The superpartners of the matter particles are called squarks and sleptons, while the superpartners of the interaction particles are called gauginos. The mass eigenstates of the gauginos are referred to as charginos and neutralinos, according to their electric charge. Since the predicted supersymmetric particles have not yet been observed, Supersymmetry, if it exists in nature, has to be broken in such a way that the masses of Standard Model particles and of their superpartners differ. During the last decades, the energies accessible to experiments has steadily increased. The Tevatron Accelerator at the Fermi National Accelerator Laboratory, with the two multipurpose experiments D0 and CDF, provides currently the highest center-of-mass energy ever reached in experiments using collisions of protons and antiprotons ({radical}s = 1.96 TeV). The study of the particle collisions allows probing of predictions of the Standard Model and its extensions, e.g. Supersymmetry.

Torchiani, Ingo; /Freiburg U

2008-09-01T23:59:59.000Z

333

Exploring the Doubly Charged Higgs of the Left-Right Symmetric Model using Vector Boson Fusion-like Events at the LHC  

E-Print Network (OSTI)

This paper studies the pair production of the doubly charged Higgs boson of the left-right symmetric models using multilepton final state in the vector boson fusion (VBF)-like processes. The study is performed in the framework consistent with the model's correction to the standard model $\\rho_{EW}$ parameter. VBF topological cuts, number of leptons in the final state and $p_T$ cuts on the leptons are found to be effective in suppressing the background. Significant mass reach can be achieved for exclusion/discovery of the doubly charge Higgs boson for the upcoming LHC run with a luminosity of $\\mathcal{O}(10^3)$ fb$^{-1}$.

Bhaskar Dutta; Ricardo Eusebi; Yu Gao; Tathagata Ghosh; Teruki Kamon

2014-04-02T23:59:59.000Z

334

Position Resolution and Upgrade of the CMS Pixel Detector and Search for the Higgs Boson in the tau+tau- Final State  

E-Print Network (OSTI)

The thesis presents a measurement of the resolution of the CMS pixel detector, and shows that with the Phase-I Upgrade an improvement of 25% can be achieved. Furthermore, an improvement of the "Embedding" method for estimating the major background to the search for the Higgs boson in the di-tau final state is presented. The analysis in a dedicated search channel where the Higgs boson is produced in associated with a W boson has been carried out and is documented in this work.

Burgmeier, Armin

335

Higgs boson exempt no-scale supersymmetry and its collider and cosmology implications  

SciTech Connect

One of the most straightforward ways to address the flavor problem of low-energy supersymmetry is to arrange for the scalar soft terms to vanish simultaneously at a scale M{sub c} much larger than the electroweak scale. This occurs naturally in a number of scenarios, such as no-scale models, gaugino mediation, and several models with strong conformal dynamics. Unfortunately, the most basic version of this approach that incorporates gaugino mass unification and zero scalar masses at the grand unification scale is not compatible with collider and dark matter constraints. However, experimental constraints can be satisfied if we exempt the Higgs bosons from flowing to zero mass value at the high scale. We survey the theoretical constructions that allow this and investigate the collider and dark matter consequences. A generic feature is that the sleptons are relatively light. Because of this, these models frequently give a significant contribution to the anomalous magnetic moment of the muon, and neutralino-slepton coannihilation can play an important role in obtaining an acceptable dark matter relic density. Furthermore, the light sleptons give rise to a large multiplicity of lepton events at colliders, including a potentially suggestive clean trilepton signal at the Tevatron, and a substantial four lepton signature at the LHC.

Evans, Jason L.; Morrissey, David E.; Wells, James D. [Michigan Center for Theoretical Physics (MCTP), Physics Department, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2007-03-01T23:59:59.000Z

336

Phantom of Higgs Boson Versus Hierarchy of Stationary States of Superhigh Energies  

E-Print Network (OSTI)

As is known, the Standard Model mainly ideologically and qualitatively focuss the experimenters in their search of new mass states (of EP- elementary particles). The exact quantitative prognosis of their properties, especially of masses, lays outside opportunities of the usual theory. Model of Stationary states of EP within the framework of the Wave Universe Concept [Chechelnitsky, 1980-2001] points on existence of Hierarchy of physically distinguished - stationary (elite, dominant) states described by the mass formulas, in particular, in a range 10-210 Gev/c^2. The states close to: ..., 101.5; 107.3; 112.76-113; 139.5-143; 147.6; 202 Gev/c^2 should be observed. Apparently, the experiment already confirms this prognosis in a range up to 100 Gev/c^2. You see preferable states, observable already now in experiment, it - not rejected by the usual theory as the candidates in constituents of Standard model (for example, not holding Higgs bosons), but quite real displays of stationary (first of all, -dominant) mass states. Last data of L3 (CERN) Collaboration really specify displays of new mass states and close to 103.7; 108.9; 114.5 Gev/c^2.

A. M. Chechelnitsky

2001-03-21T23:59:59.000Z

337

Production and FCNC decay of supersymmetric Higgs bosons into heavy quarks in the LHC  

E-Print Network (OSTI)

We analyze the production and subsequent decay of the neutral MSSM Higgs bosons (h = h^0, H^0, A^0) mediated by flavor changing neutral currents (FCNC) in the LHC collider. We have computed the h-production cross-section times the FCNC branching ratio, \\sigma(pp -> h -> qq') = \\sigma(pp -> h) B(h -> qq'), in the LHC focusing on the strongly-interacting FCNC sector. Here qq' is an electrically neutral pair of quarks of different flavors, the dominant modes being those containing a heavy quark: tc or bs. We determine the maximum production rates for each of these modes and identify the relevant regions of the MSSM parameter space, after taking into account the severe restrictions imposed by low energy FCNC processes. The analysis of \\sigma(pp -> h -> qq') singles out regions of the MSSM parameter space different from those obtained by maximizing only the branching ratio, due to non-trivial correlations between the parameters that maximize/minimize each isolated factor. The production rates for the bs channel can be huge for a FCNC process (0.1-1 pb), but its detection can be problematic. The production rates for the tc channel are more modest (10^{-3}-10^{-2} pb), but its detection should be easier due to the clear-cut top quark signature. A few thousand tc events could be collected in the highest luminosity phase of the LHC, with no counterpart in the SM.

Santi Bejar; Jaume Guasch; Joan Sola

2005-10-31T23:59:59.000Z

338

Exclusive production of heavy charged Higgs boson pairs in the $p p \\to p p H^+ H^-$ reaction at the LHC and FCC  

E-Print Network (OSTI)

We calculate differential cross sections for exclusive production of heavy charged scalar, weakly interacting, particles (charged Higgs bosons, charged technipions, etc.) via photon-photon fusion in the $p p \\to p p H^+ H^-$ reaction with exact $2 \\to 4$ kinematics. We present distributions in rapidities, transverse momenta and correlations in azimuthal angles between the protons and between the charged Higgs bosons. As an example, the integrated cross section for $\\sqrt{s}$ = 14 TeV (LHC) is about 0.1 fb and about 0.9 fb at the Future Circular Collider (FCC) for $\\sqrt{s}$ = 100 TeV when assuming $m_{H^{\\pm}}$ = 150 GeV. The results are compared with results obtained within standard equivalent-photon approximation (EPA) known from the literature. We discuss the role of the Dirac and Pauli electromagnetic form factors of the proton. Absorption corrections are calculated for the first time differentially for various distributions. In general, they lead to a damping of the cross section. The damping depends on ...

Lebiedowicz, Piotr

2015-01-01T23:59:59.000Z

339

7/5/12 Higgs Boson Search Involving Texas A&M Physicists Reveals New Particle | Texas A&M University, Coll... 1/5www.science.tamu.edu/articles/911  

E-Print Network (OSTI)

for the Higgs boson, known as the "God particle" because it is thought to be responsible for generating mass7/5/12 Higgs Boson Search Involving Texas A&M Physicists Reveals New Particle | Texas A Texas A&M Physicists Reveals New Particle COLLEGE STATION -- Physicists at Texas A&M University

Toback, David

340

Search for Higgs boson production in oppositely charged dilepton and missing energy final states in 9.7 fb-1 of ppbar collisions at sqrts = 1.96 TeV  

E-Print Network (OSTI)

We present a search for Higgs boson in final states with two oppositely charged leptons and large missing transverse energy as expected in H -> WW -> lvlv decays. The events are selected from the full Run II data sample of 9.7 fb-1 of ppbar collisions collected with the D0 detector at the Fermilab Tevatron Collider at sqrt s = 1.96 TeV. To validate our search methodology, we measure the non-resonant W W production cross section and find sigma_WW = 11.6 +/- 0.7 pb, in agreement with the standard model prediction. In the Higgs boson search, no significant excess above the background expectation is observed. Upper limits at the 95% confidence level on the Higgs boson production cross section are therefore derived. Within the standard model, the Higgs boson mass range 159 Higgs boson production cross sections 4.1 times larger than the standard model expectation, which is compatible with the presence of a Higgs boson at this mass. Within a theoretical framework with a fourth generation of fermions, the mass range 125 Higgs boson couplings, which yields an exclusion of fermiophobic Higgs boson production cross sections 3.1 times larger than the expectation for MH = 125 GeV.

D0 Collaboration

2013-01-07T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Higgs boson exempt no-scale supersymmetry with a neutrino seesaw mechanism: Implications for lepton flavor violation and leptogenesis  

SciTech Connect

Motivated by the observation of neutrino oscillations, we extend the Higgs boson exempt no-scale supersymmetry model by adding three heavy right-handed neutrino chiral supermultiplets to generate the light neutrino masses and mixings. The neutrino Yukawa couplings can induce new lepton-flavor violating couplings among the soft terms in the course of renormalization group running down from the boundary scale. We study the effects this has on the predictions for low-energy probes of lepton-flavor violation (LFV). Heavy right-handed neutrinos also provide a way to generate the baryon asymmetry through leptogenesis. We find that consistency with LFV and leptogenesis puts strong requirements on either the form of the Yukawa mass matrix or the smallness of the Higgs up soft mass. In all cases, we generically expect that new physics LFV is nonzero and can be found in a future experiment.

Chun, Eung Jin [Korean Institute for Advanced Study (KIAS), Hoegiro 87, Dongdaemun-gu Seoul 130-722 (Korea, Republic of); Evans, Jason L. [Michigan Center for Theoretical Physics (MCTP), USAUniversity of Michigan, Ann Arbor, Michigan 48109 (United States); Morrissey, David E. [Michigan Center for Theoretical Physics (MCTP), USAUniversity of Michigan, Ann Arbor, Michigan 48109 (United States); Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106-4030 (United States); Wells, James D. [Michigan Center for Theoretical Physics (MCTP), USAUniversity of Michigan, Ann Arbor, Michigan 48109 (United States); CERN, Theory Division, CH-1211 Geneva 23 (Switzerland); Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106-4030 (United States)

2009-01-01T23:59:59.000Z

342

Search for chargino and neutralino production with a Higgs boson in the decay chain in one or three leptons final state events with ATLAS  

E-Print Network (OSTI)

Searches for direct production of chargino ($\\tilde{\\chi}_1^{\\pm}$) and neutralino ($\\tilde{\\chi}_0^{2}$) leading to final states characterized by the presence of a Higgs boson are reported. Events containing missing transverse momentum and one or three leptons are selected, and various channels sensitive to different Higgs decays are considered. The analyses use 20.3 fb$^{-1}$ in $R$-parity conserving phenomenological Minimal Supersymmetric Standard Models and in simplified supersymmetric models.

David, C; The ATLAS collaboration

2014-01-01T23:59:59.000Z

343

SM Higgs boson searches at the LHC Production rate Branching ratios  

E-Print Network (OSTI)

1. ?? production at the Tevatron and LHC (QCD background for H0 SM ? ?? at the LHC) 2. b ¯ b ? Higgs in Standard Model and MSSM

Boson Searches; Pavel Nadolsky; Pavel Nadolsky; C. Balázs; E. Berger; C. -p. Yuan; C. Balazs; E. Berger; S. Mrenna; C. -p. Yuan; C. Balazs; C. Schmidt; C. -p. Yuan; Pavel Nadolsky; M H (gev; Pavel Nadolsky

344

Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs  

E-Print Network (OSTI)

A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17.3??fb(?1), collected by the CMS experiment in proton-proton collisions ...

Baringer, Philip S.; Bean, Alice; Benelli, Gabriele; Kenny, R. P. III; Murray, Michael J.; Noonan, Danny; Sanders, Stephen J.; Stringer, Robert W.; Tinti, Gemma; Wood, Jeffrey Scott; Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Aguilo, E.; Bergauer, T.; Dragicevic, M.

2013-02-21T23:59:59.000Z

345

Press Pass | Press Release | July 4, 2012: Search for Higgs boson at Large  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 July 4, 2012 For immediate release Media Contact: Kathryn Jepsen, Fermilab Office of Communication, 630-659-6403, media@fnal.gov Experts available for comment on the Higgs search results: Dan Green, Fermilab (CMS)--773-414-2852 Patty McBride, Fermilab (CMS)--312-375-6825 Joel Butler, Fermilab (CMS, at ICHEP in Australia) - 630 651 4619 Fact sheet, images, graphics and videos available here Editor's note: The following US LHC news release was jointly issued by the U.S. Department of Energy's Fermi National Accelerator Laboratory and Brookhaven National Laboratory. Fermilab serves as the U.S. hub for the nearly 1,000 scientists and engineers from U.S. universities and laboratories who participate in the Compact Muon Solenoid (CMS) experiment. Fermilab hosts the LHC Physics

346

Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from pp? Collisions at ?s = 1.96 TeV  

We present the results of a search for a very light CP-odd Higgs boson a10 originating from top quark decays t?H±b ? W±(*)a10b, and subsequently decaying into ?+?-. Using a data sample corresponding to an integrated luminosity of 2.7 fb-1 collected by the CDF II detector in pp? collisions at 1.96 TeV, we perform a search for events containing a lepton, three or more jets, and an additional isolated track with transverse momentum in the range 3 to 20 GeV/c. Observed events are consistent with background sources, and 95% C.L. limits are set on the branching ratio of t?H±b for various masses of H± and a10.

Aaltonen, T [Helsinki Inst. of Phys.; Gonzalez, B Alvarez [Oviedo U.; Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U.; Dubna, JINR

2011-07-11T23:59:59.000Z

347

Measurement of W[superscript +]W[superscript ?] production and search for the Higgs boson in pp collisions at ?s = 7 TeV  

E-Print Network (OSTI)

A measurement of W[superscript +]W[superscript ?] production in pp collisions at ?s = 7 TeV and a search for the Higgs boson are reported. The W[superscript +]W[superscript ?] candidates are selected in events with two ...

Alver, B.

348

Search for Higgs boson production in trilepton and like-charge electron-muon final states with the D0 detector  

E-Print Network (OSTI)

We present a search for Higgs bosons in multilepton final states in pp-bar collisions at s?=1.96??TeV recorded with the D0 detector at the Fermilab Tevatron Collider, using the full Run II data set with integrated luminosities of up to 9.7??fb(?1...

Baringer, Philip S.; Bean, Alice; Chen, G.; Clutter, Justace Randall; Sekaric, Jadranka; Wilson, Graham Wallace; Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

2013-09-17T23:59:59.000Z

349

Constraints on the spin-parity and anomalous $\\mathrm{HVV}$ couplings of the Higgs boson in proton collisions at 7 and 8 TeV  

E-Print Network (OSTI)

The study of the spin-parity and tensor structure of the interactions of the recently discovered Higgs boson is performed using the $\\mathrm{H} \\rightarrow \\mathrm{Z} \\mathrm{Z}$, $\\mathrm{Z}\\gamma^*$, $\\gamma^*\\gamma^* \\rightarrow 4\\ell$, $\\mathrm{H} \\rightarrow \\mathrm{W} \\mathrm{W} \\rightarrow \\ell\

Khachatryan, Vardan; CMS Collaboration; Tumasyan, Armen; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko; Erö, Janos; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hartl, Christian; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knünz, Valentin; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Herbert; Schöfbeck, Robert; Strauss, Josef; Treberer-Treberspurg, Wolfgang; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Alderweireldt, Sara; Bansal, Sunil; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Knutsson, Albert; Lauwers, Jasper; Luyckx, Sten; Ochesanu, Silvia; Rougny, Romain; Van De Klundert, Merijn; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Daci, Nadir; Heracleous, Natalie; Keaveney, James; Lowette, Steven; Maes, Michael; Olbrechts, Annik; Python, Quentin; Strom, Derek; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Caillol, Cécile; Clerbaux, Barbara; De Lentdecker, Gilles; Dobur, Didar; Favart, Laurent; Gay, Arnaud; Grebenyuk, Anastasia; Léonard, Alexandre; Mohammadi, Abdollah; Perniè, Luca; Randle-conde, Aidan; Reis, Thomas; Seva, Tomislav; Thomas, Laurent; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Zenoni, Florian; Adler, Volker; Beernaert, Kelly; Benucci, Leonardo; Cimmino, Anna; Costantini, Silvia; Crucy, Shannon; Dildick, Sven; Fagot, Alexis; Garcia, Guillaume; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Salva Diblen, Sinem; Sigamani, Michael; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Beluffi, Camille; Bruno, Giacomo; Castello, Roberto; Caudron, Adrien; Ceard, Ludivine; Da Silveira, Gustavo Gil; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Jafari, Abideh; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Nuttens, Claude; Perrini, Lucia; Pin, Arnaud; Piotrzkowski, Krzysztof; Popov, Andrey; Quertenmont, Loic; Selvaggi, Michele; Vidal Marono, Miguel; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Aldá Júnior, Walter Luiz; Alves, Gilvan; Brito, Lucas; Correa Martins Junior, Marcos; Dos Reis Martins, Thiago; Molina, Jorge; Mora Herrera, Clemencia; Pol, Maria Elena; Rebello Teles, Patricia; Carvalho, Wagner; Chinellato, Jose; Custódio, Analu; Da Costa, Eliza Melo; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Malbouisson, Helena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santaolalla, Javier; Santoro, Alberto; Sznajder, Andre; Tonelli Manganote, Edmilson José; Vilela Pereira, Antonio; Bernardes, Cesar Augusto; Dogra, Sunil; Tomei, Thiago; De Moraes Gregores, Eduardo; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Aleksandrov, Aleksandar; Genchev, Vladimir; Hadjiiska, Roumyana; Iaydjiev, Plamen; Marinov, Andrey; Piperov, Stefan; Rodozov, Mircho; Sultanov, Georgi; Vutova, Mariana; Dimitrov, Anton; Glushkov, Ivan; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Chen, Mingshui; Cheng, Tongguang; Du, Ran; Jiang, Chun-Hua; Plestina, Roko; Romeo, Francesco; Tao, Junquan; Wang, Zheng; Asawatangtrakuldee, Chayanit; Ban, Yong; Li, Qiang; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Wang, Dayong; Xu, Zijun; Zou, Wei; Avila, Carlos; Cabrera, Andrés; Chaparro Sierra, Luisa Fernanda; Florez, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Kadija, Kreso; Luetic, Jelena; Mekterovic, Darko; Sudic, Lucija; Attikis, Alexandros; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Bodlak, Martin; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; Ellithi Kamel, Ali; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Murumaa, Marion; Raidal, Martti; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko; Härkönen, Jaakko; Karimäki, Veikko; Kinnunen, Ritva; Kortelainen, Matti J; Lampén, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindén, Tomas; Luukka, Panja-Riina; Mäenpää, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Wendland, Lauri; Talvitie, Joonas

2014-01-01T23:59:59.000Z

350

Search for a Low-Mass Standard Model Higgs Boson in the ?? Decay Channel in pp? Collisions at ?s=1.96??TeV  

E-Print Network (OSTI)

We report on a search for the standard model Higgs boson decaying into pairs of ? leptons in pp? collisions produced by the Tevatron at ?s=1.96??TeV. The analyzed data sample was recorded by the CDFII detector and corresponds ...

Bauer, Gerry P.

351

Combined search for the Standard Model Higgs boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector  

E-Print Network (OSTI)

A combined search for the Standard Model Higgs boson with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities from 4.6 fb^-1 to 4.9 fb^-1 of proton-proton collisions collected at sqrt(s) = 7 TeV in 2011. The Higgs boson mass ranges of 111.4 GeV to 116.6 GeV, 119.4 GeV to 122.1 GeV, and 129.2 GeV to 541 GeV are excluded at the 95% confidence level, while the range 120 GeV to 560 GeV is expected to be excluded in the absence of a signal. An excess of events is observed at Higgs boson mass hypotheses around 126 GeV with a local significance of 2.9 standard deviations (sigma). The global probability for the background to produce an excess at least as significant anywhere in the entire explored Higgs boson mass range of 110-600 GeV is estimated to be ~15%, corresponding to a significance of approximately one sigma.

ATLAS Collaboration

2012-07-13T23:59:59.000Z

352

Search for the Higgs boson in the H ? WW ? ?vjj decay channel at ?s = 7 TeV with the ATLAS detector  

E-Print Network (OSTI)

A search for the Standard Model Higgs boson has been performed in the H?WW???jj channel using 4.7 fb[superscript ?1] of pp collision data recorded at a centre-of-mass energy of ?s = 7 TeV with the ATLAS detector at the ...

Taylor, Frank E.

353

Search for the Higgs boson in H -> WW(*) decays in p(p)over-bar collisions at root(s)=1.96 TeV  

E-Print Network (OSTI)

We present a search for the standard model Higgs boson in H -> WW(*) decays with e(+)e(-), e(+/-)mu(-/+), and mu(+)mu(-) final states in p (p) over bar collisions at a center-of-mass-energy of root s = 1.96 TeV. The data, collected from April 2002...

Baringer, Philip S.; Bean, Alice; Christofek, L.; Coppage, Don; Gardner, J.; Hensel, Carsten; Jabeen, S.; Moulik, Tania; Wilson, Graham Wallace

2006-01-01T23:59:59.000Z

354

Combined search for the Standard Model Higgs boson in pp collisions at ?s=7??TeV with the ATLAS detector  

E-Print Network (OSTI)

A combined search for the Standard Model Higgs boson with the ATLAS detector at the LHC is presented. The data sets used correspond to integrated luminosities from 4.6??fb[superscript -1] to 4.9??fb[superscript -1] of ...

Taylor, Frank E.

355

Search for a heavy Standard Model Higgs boson in the channel H?ZZ??[superscript +]?[superscript ?]q[bar over q] using the ATLAS detector  

E-Print Network (OSTI)

A search for a heavy Standard Model Higgs boson decaying via View the H?ZZ??[superscript +]?[superscript ?]q[bar over q], where ?=e,? is presented. The search is performed using a data set of pp collisions at ?s = 7 TeV, ...

Taylor, Frank E.

356

Search for the Higgs boson produced with $Z \\to \\ell^+\\ell^-$ in $p\\bar{p}$ collisions at $\\sqrt{s}=$ 1.96 TeV  

SciTech Connect

The authors present a search for the Higgs boson in the process q{bar q} {yields} ZN {yields} {ell}{sup +}{ell}{sup -} b{bar b}. The analysis uses an integrated luminosity of 1 fb{sup -1} of p{bar p} collisions produced at {radical}s = 1.96 TeV and accumulated by the upgraded Collider Detector at Fermilab (CDF II). They employ artificial neural networks both to correct jets mismeasured in the calorimeter, and to distinguish the signal kinematic distributions from those of the background. They see no evidence for Higgs boson production, and set 95% CL upper limits on {sigma}{sub ZH} {center_dot} {Beta}(H {yields} b{bar b}), ranging from 1.5 pb to 1.2 pb for a Higgs mass (m{sub H}) of 110 to 150 GeV/c{sup 2}.

Aaltonen, T.; /Helsinki Inst. of Phys.; Adelman, J.; /Chicago U., EFI; Akimoto, T.; /Tsukuba U.; Albrow, Michael G.; /Fermilab; Alvarez Gonzalez, B.; /CSIC, Catalunya; Amerio, S.; /INFN, Padua; Amidei, Dante E.; /Michigan U.; Anastassov, A.; /Northwestern U.; Annovi, Alberto; /Frascati; Antos, J.; /Comenius U.; Apollinari, G.; /Fermilab /Purdue U.

2008-07-01T23:59:59.000Z

357

Improved $?$-weapons for Higgs hunting  

E-Print Network (OSTI)

In this work, we use the results from Higgs searches in the $\\gamma\\gamma$ and $\\tau\\tau$ decay channels at LHC and indirect bounds as BR$(B \\to X_s \\gamma)$ to constrain the parameter space of a generic MSSM Higgs sector. In particular, we include the latest CMS results that look for additional Higgs states with masses up to 1 TeV. We show that the $\\tau \\tau$ channel is the best and most accurate weapon in the hunt for new Higgs states beyond the Standard Model. We obtain that present experimental results rule out additional neutral Higgs bosons in a generic MSSM below 300 GeV for any value of $\\tan \\beta$ and, for instance, values of $\\tan \\beta$ above 30 are only possible for Higgs masses above 600 GeV. ATLAS stored data has the potential to render this bound obsolete in the near future.

G. Barenboim; C. Bosch; M. L. López-Ibáñez; O. Vives

2013-11-28T23:59:59.000Z

358

Higgs boson decay to charm pair at full one-loop level in the MSSM with flavour violation  

E-Print Network (OSTI)

We study the decay of the lightest neutral Higgs boson to a charm quark pair at full one-loop level in the MSSM with non-minimal quark flavour violation (QFV). In the numerical analysis we consider mixing between the second and the third squark generation and all relevant constraints from B meson data are taken into account. It is shown that the full one-loop corrected decay width can be quite sensitive to the MSSM QFV parameters due to large $\\tilde c - \\tilde t$ mixing and large trilinear couplings. After summarising the theoretical and experimental errors, we conclude that an observation of these SUSY QFV effects is possible at the ILC.

Eberl, H; Ginina, E; Hidaka, K; Majerotto, M

2014-01-01T23:59:59.000Z

359

Probing Higgs Boson CP Properties with $t\\bar{t}H$ at the LHC and the 100 TeV pp Collider  

E-Print Network (OSTI)

The Higgs boson $H$ has the largest coupling to the top quark $t$ among the standard model (SM) fermions. This is one of the ideal places to investigate new physics beyond SM. In this work, we study the potential of determining Higgs boson $CP$ properties at the LHC and future 33 TeV and 100 TeV $pp$ colliders by analysing various operators formed from final states variables in $t\\bar{t}H$ production. The discrimination power from SM coupling is obtained with Higgs boson reconstructed from $ H\\to \\gamma \\gamma$ and $ H\\to b \\bar{b}$. We find that $t\\bar{t}b\\bar{b}$ process can provide more than 3$\\sigma$ discrimination power with 300 $fb^{-1}$ integrated luminosity in a wide range of allowed Higgs to top couplings for the LHC, the 33 TeV and 100 TeV colliders. For $t\\bar{t}\\gamma\\gamma$ the discrimination power will be below 3$\\sigma$ at the LHC, while for 33 TeV and 100 TeV colliders, more than 3$\\sigma$ sensitivity can be reached.

He, Xiao-Gang; Zheng, Ya-Juan

2015-01-01T23:59:59.000Z

360

Search for charged Higgs bosons in decays of top quarks in proton - antiproton collisions at s**(1/2) = 1.96 TeV  

SciTech Connect

In this dissertation we report on the first direct search for charged Higgs bosons in decays of top quarks in p{bar p} collisions at {radical}s = 1.96 TeV. The search uses a data sample with an integrated luminosity of 2.2 fb{sup -1} collected by the CDF II detector at Fermilab and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of t{bar t} candidates. We observe no evidence of charged Higgs bosons in top quark decays; hence 95% C.L. upper limits on the branching ratio are placed at {Beta}(t {yields} H{sup +}b) < 0.1 to 0.3 for charged Higgs boson masses of 60 to 150 GeV/c{sup 2} assuming {Beta}(H{sup +} {yields} c{bar s}) = 1.0 and {Beta}(t {yields} Wb)+{Beta}(t {yields} H{sup +}b) = 1.0. The upper limits on {Beta}(t {yields} H{sup +}b) are also used as model independent limits on the decay branching ratio of top quarks to any charged scalar bosons beyond the standard model.

Yu, Geum Bong; /Rochester U.

2009-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Search for charged Higgs bosons in decays of top quarks in p anti-p collisions at s**(1/2) = 1.96 TeV  

SciTech Connect

We report on the first direct search for charged Higgs bosons in decays of top quarks in p{bar p} collisions at {radical}s = 1.96 TeV. The search uses a data sample corresponding to an integrated luminosity of 2.2 fb{sup -1} collected by the CDF II detector at Fermilab, and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of t{bar t} candidates. We observe no evidence of charged Higgs bosons in top quark decays. Hence, 95% upper limits on the top quark decay branching ratio are placed at {Beta}(t {yields} H{sup +}b) < 0.1 to 0.3 for charged Higgs boson masses of 60 to 150 GeV/c{sup 2}, assuming {Beta}(H{sup +} {yields} c{bar s}) = 1.0. The upper limits on {Beta}(t {yields} H{sup +}b) can also be used as model-independent limits on the decay branching ratio of top quarks to generic scalar charged bosons beyond the standard model.

Aaltonen, T.; /Helsinki U. /Helsinki Inst. of Phys.; Adelman, J.; /Chicago U., EFI; Akimoto, T.; /Tsukuba U.; Alvarez Gonzalez, B.; /Cantabria Inst. of Phys.; Amerio, S.; /Padua U. /INFN, Padua; Amidei, D.; /Michigan U.; Anastassov, A.; /Northwestern U.; Annovi, A.; /Frascati; Antos, J.; /Comenius U.; Apollinari, G.; /Fermilab; Apresyan, A.; /Purdue U. /Waseda U.

2009-07-01T23:59:59.000Z

362

Search for the Standard Model Higgs Boson in the Decay Channel H?ZZ?4l in pp Collisions at sqrt[s]=7??TeV  

SciTech Connect

A search for a Higgs boson in the four-lepton decay channel H to ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range 110 < mH < 600 GeV. The analysis uses data corresponding to an integrated luminosity of 4.7 inverse femtobarns recorded by the CMS detector in pp collisions at sqrt(s) = 7 TeV from the LHC. Seventy-two events are observed with four-lepton invariant mass m[4 leptons] > 100 GeV (with thirteen below 160 GeV), while 67.1 +/- 6.0 (9.5 +/-1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges 134-158 GeV, 180-305 GeV, and 340 -465 GeV. Small excesses of events are observed around masses of 119, 126, and 320 GeV, making the observed limits weaker than expected in the absence of a signal.

Chatrchyan, Serguei; et al.

2012-03-01T23:59:59.000Z

363

Measurement of the Higgs Boson Mass from the H ? ?? and H ? ZZ* ? 4? Channels in pp Collisions at Center-of-Mass Energies of 7 and 8 TeV with the ATLAS Detector  

E-Print Network (OSTI)

An improved measurement of the mass of the Higgs boson is derived from a combined fit to the reconstructed invariant mass spectra of the decay channels H ? ?? and H ? ZZ[superscript ?] ? 4?. The analysis uses the pp collision ...

Taylor, Frank E.

364

Search for a standard model Higgs boson in the H?ZZ??[superscript +]?[subscript ?]?[bar over ?] decay channel using 4.7 fb[superscript -1] of ?s = 7 TeV data with the ATLAS detector  

E-Print Network (OSTI)

A search for a Standard Model Higgs boson decaying via H?ZZ??[superscript +]?[superscript ?]?[bar over ?], where ? represents electrons or muons, is presented. It is based on proton–proton collision data at ?s = 7 TeV, ...

Taylor, Frank E.

365

Search for the Standard Model Higgs boson in the decay channel H?ZZ(*)?4? with 4.8 fb[superscript -1] of pp collision data at ?s = 7 TeV with ATLAS  

E-Print Network (OSTI)

This Letter presents a search for the Standard Model Higgs boson in the decay channel H?ZZ(*)??[superscript +]?[superscript ?]??[superscript +]??[superscript ?], where ?,?? = e or ?, using proton–proton collisions at ?s = ...

Taylor, Frank E.

366

Fiducial and differential cross sections of Higgs boson production measured in the four-lepton decay channel in pp collisions at ?s = 8 TeV with the ATLAS detector  

E-Print Network (OSTI)

Measurements of fiducial and differential cross sections of Higgs boson production in the H?ZZ*?4? decay channel are presented. The cross sections are determined within a fiducial phase space and corrected for detection ...

Taylor, Frank E.

367

Measurement of the properties of the new particle observed within the search for the Higgs boson in the $H \\rightarrow ZZ^{(*)} \\rightarrow 4\\ell$ channel at ATLAS.  

E-Print Network (OSTI)

The discovery of a new particle within the search for the Standard Model Higgs boson in the $H \\rightarrow ZZ^{(?)} \\rightarrow 4\\ell$ channel at ATLAS, with about 25 fb$^{?1}$ of data collected in pp collisions at the LHC, is discussed. Different hypotheses on the quantum numbers of the new boson are tested, by means of spin–parity studies based on a matrix element description of the $H \\rightarrow ZZ$ decay amplitude. Prospects for the measurement of the tensor structure of the $HZZ$ vertex in the spin zero hypothesis at a high–luminosity LHC are also presented.

Ippolito, Valerio; Giagu, Stefano; Rescigno, Marco

368

Search for associated Higgs boson production using like charge dilepton events in p p? collisions at ?s = 1.96 TeV  

We present a search for associated Higgs boson production in the process pp?? W/ZH ? ell± ell± + X in ee, e?, and ?? final states. The search is based on data collected by the D0 experiment at the Fermilab Tevatron Collider at ?s = 1.96 TeV corresponding to 5.3 fb-1 of integrated luminosity. We require two isolated leptons (electrons or muons) with the same electric charge and additional kinematic requirements. No significant excess above background is observed, and we set 95% C.L. observed (expected) upper limits on ratio of the production cross sectin to the standard model expectation of 6.4 (7.3) for a Higgs boson mass of 165 GeV and 13.5 (19.8) for a mass of 115 GeV.

Abazov, V M [Dubna, JINR; Abbott, B [Oklahoma U.; Acharya, B S [Tata Inst.; Adams, M [Illinois U., Chicago; Adams, T [Florida State U.; Alexeev, G D [Dubna, JINR; Alkhazov, G [St. Petersburg, INP; Alton, A [Augustana Coll., Sioux Falls; Michigan U.; Alverson, G [Northeastern U.; Alves, G A [Rio de Janeiro, CBPF; Aoki, M [Fermilab; Louisiana Tech. U.

2011-11-04T23:59:59.000Z

369

Search for the Standard Model Higgs boson production in association with top quarks in pp collisions at 8 TeV with the ATLAS detector  

E-Print Network (OSTI)

The search for the production of the Higgs boson associated with a pair of top quarks in the ATLAS experiment is presented. It focuses on Higgs bosons decaying to $b\\bar{b}$ and events containing two leptons (electrons and/or muons). It uses 20.3 fb$^{-1}$ of $pp$ collision data at $\\sqrt{s}$ = 8 TeV collected with the ATLAS detector at the LHC in 2012. No significant excess of events is found and the 95% CL observed (expected) limit is 7.0xSM (4.3xSM). After combining with the single lepton final state an observed (expected) limit of 4.1xSM (2.6xSM) with a best fit of $\\mu=1.7\\pm1.4$ is obtained.

Moreno Llacer, Maria

2014-01-01T23:59:59.000Z

370

Search for the Standard Model Higgs Boson in the H to to lepton-hadron and hadron-hadron Decay Modes with the ATLAS Detector  

Science Journals Connector (OSTI)

Abstract In this proceeding, a search for a Higgs boson in the H to ? + ? ? decay mode, where both taus decay hadronically or one decay hadronically and one leptonically. The analysis is based on a data sample of proton-proton collision collected by the ATLAS detector at the Large Hadron Collider (LHC) at centre-of-mass energies of 7 TeV during 2011, corresponding to an integrated luminosity of 4.7 f b ? 1 . No significant excess is observed in the Higgs boson mass range of 100–150 GeV. The observed (expected) limits on the cross-section times branching ratio for H to ? + ? ? at m H = 125 GeV are 6.2(5.9) and 6.3(6.5) for lepton-hadron and hadron-hadron decay modes, respectively.

Yuki Sakurai

2014-01-01T23:59:59.000Z

371

Search for nonstandard Higgs bosons using high mass photon pairs in p(p)over-bar ->gamma gamma+2 jets at root s=1.8 TeV  

E-Print Network (OSTI)

A search has been carried out for events in the channel p(p)over-bar --> gamma gamma + 2 jets. Such a signature can characterize the production of a nonstandard Higgs boson together with a W or Z boson. We refer to this ...

Baringer, Philip S.; Coppage, Don; Hebert, C.

1999-03-01T23:59:59.000Z

372

VOLUME 86, NUMBER 9 P H Y S I C A L R E V I E W L E T T E R S 26 FEBRUARY 2001 p p ! ttH: A Discovery Mode for the Higgs Boson at the Fermilab Tevatron  

E-Print Network (OSTI)

¯tH: A Discovery Mode for the Higgs Boson at the Fermilab Tevatron J. Goldstein,1 C. S. Hill,2 J. Incandela,1 (Received 28 June 2000) The production of a standard model Higgs boson in association with a top quark pair with and complementary to the searches using p ¯p ! WH, ZH associated production. For higher mass Higgs bosons the H ! W1

Incandela, Joe

373

Search for a standard model-like Higgs boson in the $\\mu^+\\mu^-$ and $\\mathrm{e^+e^-}$ decay channels at the LHC  

E-Print Network (OSTI)

A search is presented for a standard model-like Higgs boson decaying to the $\\mu^+\\mu^-$ or $\\mathrm{e^+e^-}$ final states based on proton-proton collisions recorded by the CMS experiment at the CERN LHC. The data correspond to integrated luminosities of 5.0$~\\mathrm{fb}^{-1}$ at a centre-of-mass energy of $7~\\mathrm{TeV}$ and $19.7~\\mathrm{fb}^{-1}$ at $8~\\mathrm{TeV}$ for the $\\mu^+\\mu^-$ search, and of $19.7~\\mathrm{fb}^{-1}$ at a centre-of-mass energy of $8~\\mathrm{TeV}$ for the $\\mathrm{e^+e^-}$ search. To enhance the sensitivity of the search, events are categorized by topologies according to production process and dilepton invariant mass resolution. Upper limits on the production cross section times branching fraction at the 95% confidence level are reported for Higgs boson masses in the range from 120 to 150$~\\mathrm{GeV}$. For a Higgs boson with a mass of 125$~\\mathrm{GeV}$ decaying to $\\mu^+\\mu^-$, the observed (expected) upper limit on the production rate is found to be 7.4 ($6.5^{+2.8}_{-1.9}$) t...

Khachatryan, Vardan; CMS Collaboration; Tumasyan, Armen; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko; Erö, Janos; Fabjan, Christian; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hartl, Christian; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knünz, Valentin; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Herbert; Schöfbeck, Robert; Strauss, Josef; Taurok, Anton; Treberer-Treberspurg, Wolfgang; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Alderweireldt, Sara; Bansal, Monika; Bansal, Sunil; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Knutsson, Albert; Luyckx, Sten; Ochesanu, Silvia; Rougny, Romain; Van De Klundert, Merijn; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Daci, Nadir; Heracleous, Natalie; Keaveney, James; Lowette, Steven; Maes, Michael; Olbrechts, Annik; Python, Quentin; Strom, Derek; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Caillol, Cécile; Clerbaux, Barbara; De Lentdecker, Gilles; Dobur, Didar; Favart, Laurent; Gay, Arnaud; Grebenyuk, Anastasia; Léonard, Alexandre; Mohammadi, Abdollah; Perniè, Luca; Reis, Thomas; Seva, Tomislav; Thomas, Laurent; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Zenoni, Florian; Adler, Volker; Beernaert, Kelly; Benucci, Leonardo; Cimmino, Anna; Costantini, Silvia; Crucy, Shannon; Dildick, Sven; Fagot, Alexis; Garcia, Guillaume; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Salva Diblen, Sinem; Sigamani, Michael; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Beluffi, Camille; Bruno, Giacomo; Castello, Roberto; Caudron, Adrien; Ceard, Ludivine; Da Silveira, Gustavo Gil; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Jafari, Abideh; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Nuttens, Claude; Pagano, Davide; Perrini, Lucia; Pin, Arnaud; Piotrzkowski, Krzysztof; Popov, Andrey; Quertenmont, Loic; Selvaggi, Michele; Vidal Marono, Miguel; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Aldá Júnior, Walter Luiz; Alves, Gilvan; Brito, Lucas; Correa Martins Junior, Marcos; Dos Reis Martins, Thiago; Mora Herrera, Clemencia; Pol, Maria Elena; Carvalho, Wagner; Chinellato, Jose; Custódio, Analu; Da Costa, Eliza Melo; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Malbouisson, Helena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santaolalla, Javier; Santoro, Alberto; Sznajder, Andre; Tonelli Manganote, Edmilson José; Vilela Pereira, Antonio; Bernardes, Cesar Augusto; Dogra, Sunil; Tomei, Thiago; De Moraes Gregores, Eduardo; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Aleksandrov, Aleksandar; Genchev, Vladimir; Iaydjiev, Plamen; Marinov, Andrey; Piperov, Stefan; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Tcholakov, Vanio; Vutova, Mariana; Dimitrov, Anton; Glushkov, Ivan; Hadjiiska, Roumyana; Kozhuharov, Venelin; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Chen, Mingshui; Du, Ran; Jiang, Chun-Hua; Plestina, Roko; Romeo, Francesco; Tao, Junquan; Wang, Zheng; Asawatangtrakuldee, Chayanit; Ban, Yong; Li, Qiang; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Wang, Dayong; Zou, Wei; Avila, Carlos; Chaparro Sierra, Luisa Fernanda; Florez, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Kadija, Kreso; Luetic, Jelena; Mekterovic, Darko; Sudic, Lucija; Attikis, Alexandros; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Bodlak, Martin; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; Ellithi Kamel, Ali; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Murumaa, Marion; Raidal, Martti; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko; Härkönen, Jaakko; Karimäki, Veikko; Kinnunen, Ritva; Kortelainen, Matti J; Lampén, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindén, Tomas; Luukka, Panja-Riina; Mäenpää, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Wendland, Lauri; Talvitie, Joonas

2014-01-01T23:59:59.000Z

374

Handbook of LHC Higgs Cross Sections: 3. Higgs Properties  

E-Print Network (OSTI)

This Report summarizes the results of the activities in 2012 and the first half of 2013 of the LHC Higgs Cross Section Working Group. The main goal of the working group was to present the state of the art of Higgs Physics at the LHC, integrating all new results that have appeared in the last few years. This report follows the first working group report Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables (CERN-2011-002) and the second working group report Handbook of LHC Higgs Cross Sections: 2. Differential Distributions (CERN-2012-002). After the discovery of a Higgs boson at the LHC in mid-2012 this report focuses on refined prediction of Standard Model (SM) Higgs phenomenology around the experimentally observed value of 125-126 GeV, refined predictions for heavy SM-like Higgs bosons as well as predictions in the Minimal Supersymmetric Standard Model and first steps to go beyond these models. The other main focus is on the extraction of the characteristics and properties of the newly discovered particle such as couplings to SM particles, spin and CP-quantum numbers etc.

The LHC Higgs Cross Section Working Group; S. Heinemeyer; C. Mariotti; G. Passarino; R. Tanaka; J. R. Andersen; P. Artoisenet; E. A. Bagnaschi; A. Banfi; T. Becher; F. U. Bernlochner; S. Bolognesi; P. Bolzoni; R. Boughezal; D. Buarque; J. Campbell; F. Caola; M. Carena; F. Cascioli; N. Chanon; T. Cheng; S. Y. Choi; A. David; P. de Aquino; G. Degrassi; D. Del Re; A. Denner; H. van Deurzen; S. Diglio; B. Di Micco; R. Di Nardo; S. Dittmaier; M. Duhrssen; R. K. Ellis; G. Ferrera; N. Fidanza; M. Flechl; D. de Florian; S. Forte; R. Frederix; S. Frixione; S. Gangal; Y. Gao; M. V. Garzelli; D. Gillberg; P. Govoni; M. Grazzini; N. Greiner; J. Griffiths; A . V. Gritsan; C. Grojean; D. C. Hall; C. Hays; R. Harlander; R. Hernandez-Pinto; S. Hoche; J. Huston; T. Jubb; M. Kadastik; S. Kallweit; A. Kardos; L. Kashif; N. Kauer; H. Kim; R. Klees; M. Kramer; F. Krauss; A. Laureys; S. Laurila; S. Lehti; Q. Li; S. Liebler; X. Liu; H. E. Logan; G. Luisoni; M. Malberti; F. Maltoni; K. Mawatari; F. Maierhofer; H. Mantler; S. Martin; P. Mastrolia; O. Mattelaer; J. Mazzitelli; B. Mellado; K. Melnikov; P. Meridiani; D. J. Miller; E. Mirabella; S. O. Moch; P. Monni; N. Moretti; A. Muck; M. Muhlleitner; P. Musella; P. Nason; C. Neu; M. Neubert; C. Oleari; J. Olsen; G. Ossola; T. Peraro; K. Peters; F. Petriello; G. Piacquadio; C. T. Potter; S. Pozzorini; K. Prokofiev; I. Puljak; M. Rauch; D. Rebuzzi; L. Reina; R. Rietkerk; A. Rizzi; Y. Rotstein-Habarnau; G. P. Salam; G. Sborlini; F. Schissler; M. Schonherr; M. Schulze; M. Schumacher; F. Siegert; P. Slavich; J. M. Smillie; O. Stal; J. F. von Soden-Fraunhofen; M. Spira; I. W. Stewart; F. J. Tackmann; P. T. E. Taylor; D. Tommasini; J. Thompson; R. S. Thorne; P. Torrielli; F. Tramontano; N. V. Tran; Z. Trocsanyi; M. Ubiali; P. Vanlaer; M. Vazquez Acosta; T. Vickey; A. Vicini; W. J. Waalewijn; D. Wackeroth; C. Wagner; J. R. Walsh; J. Wang; G. Weiglein; A. Whitbeck; C. Williams; J. Yu; G. Zanderighi; M. Zanetti; M. Zaro; P. M. Zerwas; C. Zhang; T. J . E. Zirke; S. Zuberi

2013-07-04T23:59:59.000Z

375

Study of Higgs-gauge boson anomalous couplings through $e^-e^+ \\rightarrow W^-W^+H$ at ILC  

E-Print Network (OSTI)

In this work, Higgs couplings with gauge bosons is probed through $e^-e^+ \\rightarrow W^-W^+H$ in an effective Lagrangian framework. An ILC of 500 $GeV$ center of mass energy with possible beam polarization is considered for this purpose. The reach of ILC with integrated luminosity of 300 $fb^{-1}$ in the determination of both the CP-conserving and CP-violating parameters are obtained. Sensitivity of the probe of each of these couplings on the presence of other couplings is investigated. The most influential couplings parameters are $\\bar c_W=-\\bar c_B$. Other parameters of significant effect are $\\bar c_{HW}$ and $\\bar c_{HB}$ among the CP-conserving ones, and $\\tilde c_{HW}$ and $\\tilde c_{HB}$ among the CP-violating ones. CP-violating parameter, $\\tilde c_\\gamma$ seems to have very little influence on the process considered. Detailed study of the angular distributions have presented a way to disentangle the effect of some of these couplings.

Kumar, Satendra; Sahoo, Shibananda

2015-01-01T23:59:59.000Z

376

Property measurement of Higgs boson in the gamma gamma final state with the ATLAS detector at the LHC  

E-Print Network (OSTI)

With $pp$ collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 25 ${\\rm fb}^{-1}$, an improved measurement of the mass of the Higgs boson is derived from a combined fit to the decay channels $H\\rightarrow\\gamma\\gamma$ and $H\\rightarrow ZZ^{*}\\rightarrow 4l$ with improved energy-scale calibrations for photons, electrons and muons as well as other analysis improvements. It is $m_{H}=125.36\\pm0.37{\\rm (stat)}\\pm0.18{\\rm (syst)}$ GeV. Furthermore, measurement of fiducial and differential cross sections are presented in the $H\\rightarrow\\gamma\\gamma$ decay channel using only the 8 TeV data sample with a luminosity of $20.3{\\rm fb}^{-1}$. The observed spectra are statistically limited but broadly in line with the theoretical expectations.

Yanping , Huang; The ATLAS collaboration

2014-01-01T23:59:59.000Z

377

Improved $\\tau$-weapons for Higgs hunting  

E-Print Network (OSTI)

In this work, we use the results from Higgs searches in the $\\gamma\\gamma$ and $\\tau\\tau$ decay channels at LHC and indirect bounds as BR$(B \\to X_s \\gamma)$ to constrain the parameter space of a generic MSSM Higgs sector. In particular, we include the latest CMS results that look for additional Higgs states with masses up to 1 TeV. We show that the $\\tau \\tau$ channel is the best and most accurate weapon in the hunt for new Higgs states beyond the Standard Model. We obtain that present experimental results rule out additional neutral Higgs bosons in a generic MSSM below 300 GeV for any value of $\\tan \\beta$ and, for instance, values of $\\tan \\beta$ above 30 are only possible for Higgs masses above 600 GeV. ATLAS stored data has the potential to render this bound obsolete in the near future.

Barenboim, G; López-Ibáñez, M L; Vives, O

2013-01-01T23:59:59.000Z

378

Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from pp? Collisions at ?s = 1.96 TeV  

SciTech Connect

We present the results of a search for a very light CP-odd Higgs boson a10 originating from top quark decays t?H±b ? W±(*)a10b, and subsequently decaying into ?+?-. Using a data sample corresponding to an integrated luminosity of 2.7 fb-1 collected by the CDF II detector in pp? collisions at 1.96 TeV, we perform a search for events containing a lepton, three or more jets, and an additional isolated track with transverse momentum in the range 3 to 20 GeV/c. Observed events are consistent with background sources, and 95% C.L. limits are set on the branching ratio of t?H±b for various masses of H± and a10.

Aaltonen, T [Helsinki Inst. of Phys.; Gonzalez, B Alvarez [Oviedo U.; Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U.; Dubna, JINR

2011-07-11T23:59:59.000Z

379

Search for a Higgs boson in diphoton final states with the D0 detector in 9.6 fb-1 of p-pbar collisions at sqrt(s)=1.96 TeV  

E-Print Network (OSTI)

We present a search for a Higgs boson decaying into a pair of photons based on 9.6 fb-1 of p-pbar collisions at sqrt(s)=1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. The search employs multivariate techniques to discriminate signal from the non-resonant background and is separately optimized for a standard model and a fermiophobic Higgs boson. No significant excess of data above the background prediction is observed and upper limits on the product of the cross section and branching fraction are derived at the 95% confidence level as a function of Higgs boson mass. For a standard model Higgs boson with mass of 125 GeV, the observed (expected) upper limits are a factor of 12.8 (8.7) above the standard model prediction. The existence of a fermiophobic Higgs boson with mass in the 100-113 GeV range is excluded at the 95% confidence level.

D0 Collaboration

2013-01-22T23:59:59.000Z

380

Early physics results  

Science Journals Connector (OSTI)

...obtained in the search for the Higgs boson, which would establish the postulated...missing element of the SM, the Higgs boson as the messenger of the electro-weak...expectations. 4. The hunt for the Higgs boson The search for the Higgs boson...

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Multiple solutions in supersymmetry and the Higgs  

Science Journals Connector (OSTI)

...and beyond the discovery of the Higgs boson. organised and edited by John...and beyond the discovery of the Higgs boson . Weak-scale supersymmetry is...supersymmetry The recent discovery of the Higgs boson of mass 125-126GeV at the Large...

2015-01-01T23:59:59.000Z

382

Search for a Higgs-like boson decaying to two photons in proton antiproton collisions at center of mass energy of 1.96 TeV  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 5.3.2 Z/g ? ? ee Drell-Yan (ZDY) Background . . . . . . . . . . . . . . . . . . 70 5.3.3 g +jet and Di-jet Backgrounds . . . . . . . . . . . . . . . . . . . . . . . . 71 5.3.4 Direct Di-photon Production (DDP... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 7 Conclusion 116 References 117 A Drell-Yan Z/g ? ? ee background 125 B SM systematic uncertainties: e g and e j 127 C Diphoton Invariant Mass Method 128 ix List of Figures 1.1 (a) The indirect and direct constraints on the Higgs boson mass...

Chen, Guo

2013-05-31T23:59:59.000Z

383

higgs-web.dvi  

NLE Websites -- All DOE Office Websites (Extended Search)

STATUS STATUS OF HIGGS BOSON PHYSICS November 2013 by M. Carena (Fermi National Accelerator Lab- oratory and the University of Chicago), C. Grojean (ICREA at IFAE, Universitat Aut` onoma de Barcelona), M. Kado (Lab- oratoire de l'Acc´ el´ erateur Lin´ eaire, LAL and CERN), and V. Sharma (University of California San Diego). I. Introduction . . . . . . . . . . . . . . . . 3 II. The Standard Model and the Brout-Englert-Higgs Mecha- nism . . . . . . . . . . . . . . . . . . . . 7 II.1. The SM Higgs boson mass, couplings and quantum numbers . . . . . . . . . . . . . . . . . . 9 II.2. The SM custodial symmetry . . . . . . . . . 10 II.3. Stability of the Higgs potential . . . . . . . . 12 II.4. Higgs production and decay mechanisms . . . . . 14 II.4.1. Production mechanisms at hadron colliders . . . 14 II.4.2. Production mechanisms at e + e - colliders . . . 20 II.4.3. SM Higgs branching ratios and total width . . . 21 III. The discovery of a Higgs boson . . . . . .

384

Search for Higgs Boson Production in Dilepton and Missing Energy Final States with 5.4??fb-1 of pp¯ Collisions at s=1.96??TeV  

Science Journals Connector (OSTI)

A search for the standard model Higgs boson is presented using events with two charged leptons and large missing transverse energy selected from 5.4??fb-1 of integrated luminosity in pp¯ collisions at s=1.96??TeV collected with the D0 detector at the Fermilab Tevatron collider. No significant excess of events above background predictions is found, and observed (expected) upper limits at 95% confidence level on the rate of Higgs boson production are derived that are a factor of 1.55 (1.36) above the predicted standard model cross section at mH=165??GeV.

V. M. Abazov et al. (D0 Collaboration)

2010-02-12T23:59:59.000Z

385

Impact of Light Higgs Properties on the Determination of tan ? and msusy  

Science Journals Connector (OSTI)

......section and decay branching ratios of the Higgs boson. Assuming that only the light Higgs boson will be observed at a future e + e - linear...section and decay branching ratios of the Higgs boson. Assuming that only the light Higgs boson......

Jun-ichi Kamoshita

1998-10-01T23:59:59.000Z

386

Search for the Standard Model Higgs boson produced in association with top quarks in pp collisions at ?s=8 TeV with the ATLAS detector  

E-Print Network (OSTI)

A search for the Standard Model Higgs boson produced in association with a pair of top quarks, t\\overline{t}H, is presented. The analysis uses 20.3 fb^{-1} of pp collision data at \\sqrt{s} = 8 TeV, collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the H\\to~b\\overline{b} decay mode and uses events containing one or two leptons (electrons or/and muons). The Higgs boson is assumed to have a mass of 125 GeV. In order to improve the sensitivity of the search, events are categorised according to their jet and b-tagged jet multiplicities. A multivariate technique is used to discriminate between signal and background events, which are dominated by t\\overline{t}+jets production. No significant excess of events above the background expectation is found and an observed (expected) 95% confidence-level limit of 4.1 (2.6) times the Standard Model cross section is obtained.

Moreno Llácer, M; The ATLAS collaboration

2014-01-01T23:59:59.000Z

387

Weinberg’s Higgs portal confronting recent LUX and LHC results together with upper limits on B+ and K+ decay into invisibles  

Science Journals Connector (OSTI)

We discuss a number of experimental constraints on Weinberg’s Higgs portal model. In this framework, the standard model (SM) particle spectrum is extended to include one complex scalar field S and one Dirac fermion ?. These new fields are singlets under the SM gauge group and are charged under a global U(1) symmetry. Breaking of this U(1) symmetry results in a massless Goldstone boson ? and a massive CP-even scalar r and splits the Dirac fermion into two new mass-eigenstates ?±, corresponding to Majorana fermions. The interest on such a minimal SM extension is twofold. On the one hand, if the Goldstone bosons are in thermal equilibrium with SM particles until the era of muon annihilation, their contribution to the effective number of neutrino species can explain the hints from cosmological observations of extra relativistic degrees of freedom at the epoch of last scattering. On the other hand, the lightest Majorana fermion ?? provides a plausible dark matter candidate. Mixing of r with the Higgs doublet ? is characterized by the mass of hidden scalar mh and the mixing angle ?. We constrain this parameter space using a variety of experimental data, including heavy meson decays with missing energy, the invisible Higgs width, and direct dark matter searches. We show that different experimental results compress the allowed parameter space in complementary ways, covering a large range of ?? masses (5?m??100??GeV). Though current results narrow the parameter space significantly (for the mass range of interest, ??10?3 to 10?4), there is still room for discovery (? decoupling at the muon annihilation era requires ??10?5 to 10?4). In the near future, measurements from ATLAS, CMS, LHCb, NA62, XENON1T, LUX, and CDMSlite will probe nearly the full parameter space.

Luis A. Anchordoqui; Peter B. Denton; Haim Goldberg; Thomas C. Paul; Luiz H.?M. da Silva; Brian J. Vlcek; Thomas J. Weiler

2014-04-07T23:59:59.000Z

388

TASI 2013 lectures on Higgs physics within and beyond the Standard Model  

E-Print Network (OSTI)

boson interactions. I then survey Higgs boson decays and production mechanisms at hadron and e+ e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 Gauge boson masses and couplings to the Higgs boson . . . . . . . . . . . . . . . . . . . . . 8 2.5 Fermion masses, the CKM matrix, and couplings to the Higgs boson . . . . . . . . . . . . . 12

389

Search for the Standard Model Higgs Boson in the ZH???-bar bb-bar Channel in 5.2??fb(?1) of pp-bar Collisions at s?=1.96??TeV  

E-Print Network (OSTI)

A search is performed for the standard model Higgs boson in 5.2??fb(?1) of pp-bar collisions at s?=1.96??TeV, collected with the D0 detector at the Fermilab Tevatron Collider. The final state considered is a pair of b jets and large missing...

Baringer, Philip S.; Bean, Alice; Clutter, Justace Randall; Moulik, Tania; Sekaric, Jadranka; Wilson, Graham Wallace; Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; McGivern, Carrie Lynne

2010-02-18T23:59:59.000Z

390

Search for Higgs boson production in oppositely charged dilepton and missing energy final states in 9.7??fb(?1) of pp-bar collisions at s?=1.96??TeV  

E-Print Network (OSTI)

We present a search for the Higgs boson in final states with two oppositely charged leptons and large missing transverse energy as expected in H?WW??????? decays. The events are selected from the full Run II data sample of 9.7??fb(?1) of pp...

Baringer, Philip S.; Bean, Alice; Chen, Gemma; Clutter, Jeffrey Scott; Sekaric, Jadranka; Wilson, Graham Wallace; Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

2013-09-17T23:59:59.000Z

391

Search for a Higgs boson in diphoton final states with the D0 detector in 9.6??fb(?1) of pp-bar collisions at s?=1.96??TeV  

E-Print Network (OSTI)

We present a search for a Higgs boson decaying into a pair of photons based on 9.6??fb(?1) of pp-bar collisions at s?=1.96??TeV collected with the D0 detector at the Fermilab Tevatron Collider. The search employs multivariate techniques...

Baringer, Philip S.; Bean, Alice; Chen, G.; Clutter, Justace Randall; Sekaric, Jadranka; Wilson, Graham Wallace; Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

2013-09-17T23:59:59.000Z

392

Search for associated Higgs boson production WH -> WWW*-> l(+/-)nu l('+/-)nu(')+X in p(p)over-bar collisions at root S=1.96 TeV  

E-Print Network (OSTI)

We present a search for associated Higgs boson production in the process p (p) over bar -> WH -> WWW*-> l(+/-)nu l('+/-)nu(')+X in final states containing two like-sign isolated electrons or muons (e(+/-)e(+/-), e(+/-)mu(+/-), or mu...

Baringer, Philip S.; Bean, Alice; Christofek, L.; Coppage, Don; Gardner, J.; Hensel, Carsten; Moulik, Tania; Wilson, Graham Wallace

2006-10-01T23:59:59.000Z

393

Search for the Standard Model Higgs Boson Decaying to W[superscript +]W[superscript -] in the Fully Leptonic Final State in pp Collisions at ?s = 7 TeV  

E-Print Network (OSTI)

A search for the standard model Higgs boson decaying to W[superscript +]W[superscript ?] in pp collisions at ?s = 7 TeV is reported. The data are collected at the LHC with the CMS detector, and correspond to an integrated ...

Alver, B.

394

Combined search for the Standard Model Higgs boson using up to 4.9 fb[superscript ?1] of pp collision data at ?s = 7 TeV with the ATLAS detector at the LHC  

E-Print Network (OSTI)

A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb[superscript ?1] to 4.9 fb[superscript ?1] of pp collisions ...

Taylor, Frank E.

395

Search for a Standard Model Higgs boson in the mass range 200-600 GeV in the H?ZZ??[superscript +]?[superscript ?]q[bar over q] decay channel with the ATLAS detector  

E-Print Network (OSTI)

A search for a heavy Standard Model Higgs boson decaying via H?ZZ??[superscript +]?[superscript ?]q[bar over q], where ?=e or ?, is presented. The search uses a data set of pp collisions at ?s = 7 TeV, corresponding to an ...

Taylor, Frank E.

396

Search for Higgs Boson Production in Dilepton and Missing Energy Final States with 5.4??fb(?1) of pp-bar Collisions at s?=1.96??TeV  

E-Print Network (OSTI)

A search for the standard model Higgs boson is presented using events with two charged leptons and large missing transverse energy selected from 5.4??fb(?1) of integrated luminosity in pp-bar collisions at s?=1.96??TeV collected with the D0 detector...

Baringer, Philip S.; Bean, Alice; Clutter, Justace Randall; McGivern, Carrie Lynne; Moulik, Tania; Sekaric, Jadranka; Wilson, Graham Wallace; Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.

2010-02-12T23:59:59.000Z

397

Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector  

E-Print Network (OSTI)

Results of a search for $H \\to \\tau \\tau$ decays are presented, based on the full set of proton--proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 $\\rm{fb}^{-1}$ and 20.3 $\\rm{fb}^{-1}$ at centre-of-mass energies of $\\sqrt{s}$ = 7 TeV and $\\sqrt{s}$ = 8 TeV respectively. All combinations of leptonic ($\\tau \\to \\ell \

Aad, Georges; ATLAS Collaboration; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Ossama; Abramowicz, Halina; Abreu, Henso; Abreu, Ricardo; Abulaiti, Yiming; Acharya, Bobby Samir; Adamczyk, Leszek; Adams, David; Adelman, Jahred; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar-Saavedra, Juan Antonio; Agustoni, Marco; Ahlen, Steven; Ahmadov, Faig; Aielli, Giulio; Akerstedt, Henrik; Åkesson, Torsten Paul Ake; Akimoto, Ginga; Akimov, Andrei; Alberghi, Gian Luigi; Albert, Justin; Albrand, Solveig; Alconada Verzini, Maria Josefina; Aleksa, Martin; Aleksandrov, Igor; Alexa, Calin; Alexander, Gideon; Alexandre, Gauthier; Alexopoulos, Theodoros; Alhroob, Muhammad; Alimonti, Gianluca; Alio, Lion; Alison, John; Allbrooke, Benedict; Allison, Lee John; Allport, Phillip; Aloisio, Alberto; Alonso, Alejandro; Alonso, Francisco; Alpigiani, Cristiano; Altheimer, Andrew David; Alvarez Gonzalez, Barbara; ?lvarez Piqueras, Damián; Alviggi, Mariagrazia; Amako, Katsuya; Amaral Coutinho, Yara; Amelung, Christoph; Amidei, Dante; Amor Dos Santos, Susana Patricia; Amorim, Antonio; Amoroso, Simone; Amram, Nir; Amundsen, Glenn; Anastopoulos, Christos; Ancu, Lucian Stefan; Andari, Nansi; Andeen, Timothy; Anders, Christoph Falk; Anders, Gabriel; Anderson, Kelby; Andreazza, Attilio; Andrei, George Victor; Anduaga, Xabier; Angelidakis, Stylianos; Angelozzi, Ivan; Anger, Philipp; Angerami, Aaron; Anghinolfi, Francis; Anisenkov, Alexey; Anjos, Nuno; Annovi, Alberto; Antonelli, Mario; Antonov, Alexey; Antos, Jaroslav; Anulli, Fabio; Aoki, Masato; Aperio Bella, Ludovica; Arabidze, Giorgi; Arai, Yasuo; Araque, Juan Pedro; Arce, Ayana; Arduh, Francisco Anuar; Arguin, Jean-Francois; Argyropoulos, Spyridon; Arik, Metin; Armbruster, Aaron James; Arnaez, Olivier; Arnal, Vanessa; Arnold, Hannah; Arratia, Miguel; Arslan, Ozan; Artamonov, Andrei; Artoni, Giacomo; Asai, Shoji; Asbah, Nedaa; Ashkenazi, Adi; Åsman, Barbro; Asquith, Lily; Assamagan, Ketevi; Astalos, Robert; Atkinson, Markus; Atlay, Naim Bora; Auerbach, Benjamin; Augsten, Kamil; Aurousseau, Mathieu; Avolio, Giuseppe; Axen, Bradley; Azuelos, Georges; Azuma, Yuya; Baak, Max; Baas, Alessandra; Bacci, Cesare; Bachacou, Henri; Bachas, Konstantinos; Backes, Moritz; Backhaus, Malte; Badescu, Elisabeta; Bagiacchi, Paolo; Bagnaia, Paolo; Bai, Yu; Bain, Travis; Baines, John; Baker, Oliver Keith; Balek, Petr; Balli, Fabrice; Banas, Elzbieta; Banerjee, Swagato; Bannoura, Arwa A E; Bansil, Hardeep Singh; Barak, Liron; Baranov, Sergei; Barberio, Elisabetta Luigia; Barberis, Dario; Barbero, Marlon; Barillari, Teresa; Barisonzi, Marcello; Barklow, Timothy; Barlow, Nick; Barnes, Sarah Louise; Barnett, Bruce; Barnett, Michael; Barnovska, Zuzana; Baroncelli, Antonio; Barone, Gaetano; Barr, Alan; Barreiro, Fernando; Barreiro Guimarães da Costa, João; Bartoldus, Rainer; Barton, Adam Edward; Bartos, Pavol; Bartsch, Valeria; Bassalat, Ahmed; Basye, Austin; Bates, Richard; Batista, Santiago Juan; Batley, Richard; Battaglia, Marco; Battistin, Michele; Bauer, Florian; Bawa, Harinder Singh; Beacham, James Baker; Beattie, Michael David; Beau, Tristan; Beauchemin, Pierre-Hugues; Beccherle, Roberto; Bechtle, Philip; Beck, Hans Peter; Becker, Anne Kathrin; Becker, Sebastian; Beckingham, Matthew; Becot, Cyril; Beddall, Andrew; Beddall, Ayda; Bedikian, Sourpouhi; Bednyakov, Vadim; Bee, Christopher; Beemster, Lars; Beermann, Thomas; Begel, Michael; Behr, Katharina; Belanger-Champagne, Camille; Bell, Paul; Bell, William; Bella, Gideon; Bellagamba, Lorenzo; Bellerive, Alain; Bellomo, Massimiliano; Belotskiy, Konstantin; Beltramello, Olga; Benary, Odette; Benchekroun, Driss; Bendtz, Katarina; Benekos, Nektarios; Benhammou, Yan; Benhar Noccioli, Eleonora; Benitez Garcia, Jorge-Armando; Benjamin, Douglas; Bensinger, James; Bentvelsen, Stan; Berge, David; Bergeaas Kuutmann, Elin; Berger, Nicolas; Berghaus, Frank; Beringer, Jürg; Bernard, Clare; Bernard, Nathan Rogers; Bernius, Catrin; Bernlochner, Florian Urs; Berry, Tracey; Berta, Peter; Bertella, Claudia; Bertoli, Gabriele; Bertolucci, Federico; Bertsche, Carolyn; Bertsche, David; Besana, Maria Ilaria; Besjes, Geert-Jan; Bessidskaia, Olga; Bessner, Martin Florian; Besson, Nathalie; Betancourt, Christopher; Bethke, Siegfried; Bevan, Adrian John; Bhimji, Wahid; Bianchi, Riccardo-Maria; Bianchini, Louis; Bianco, Michele; Biebel, Otmar; Bieniek, Stephen Paul; Bierwagen, Katharina; Biglietti, Michela; Bilbao De Mendizabal, Javier; Bilokon, Halina; Bindi, Marcello; Binet, Sebastien

2015-01-01T23:59:59.000Z

398

Handbook of LHC Higgs Cross Sections: 3. Higgs Properties Report of the LHC Higgs Cross Section Working Group  

E-Print Network (OSTI)

This Report summarizes the results of the activities in 2012 and the first half of 2013 of the LHC Higgs Cross Section Working Group. The main goal of the working group was to present the state of the art of Higgs Physics at the LHC, integrating all new results that have appeared in the last few years. This report follows the first working group report Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables (CERN-2011-002) and the second working group report Handbook of LHC Higgs Cross Sections: 2. Differential Distributions (CERN-2012-002). After the discovery of a Higgs boson at the LHC in mid-2012 this report focuses on refined prediction of Standard Model (SM) Higgs phenomenology around the experimentally observed value of 125-126 GeV, refined predictions for heavy SM-like Higgs bosons as well as predictions in the Minimal Supersymmetric Standard Model and first steps to go beyond these models. The other main focus is on the extraction of the characteristics and properties of the newly discovered p...

Mariotti, C; Passarino, G; Tanaka, R; Andersen, J R; Artoisenet, P; Bagnaschi, E A; Banfi, A; Becher, T; Bernlochner, F U; Bolognesi, S; Bolzoni, P; Boughezal, R; Buarque, D; Campbell, J; Caola, F; Carena, M; Cascioli, F; Chanon, N; Cheng, T; Choi, S Y; David, A; de Aquino, P; Degrassi, G; Del Re, D; Denner, A; van Deurzen, H; Diglio, S; Di Micco, B; Di Nardo, R; Dittmaier, S; Duhrssen, M; Ellis, R K; Ferrera, G; Fidanza, N; Flechl, M; de Florian, D; Forte, S; Frederix, R; Frixione, S; Gangal, S; Gao, Y; Garzelli, M V; Gillberg, D; Govoni, P; Grazzini, M; Greiner, N; Griffiths, J; Gritsan, A V; Grojean, C; Hall, D C; Hays, C; Harlander, R; Hernandez-Pinto, R; Hoche, S; Huston, J; Jubb, T; Kadastik, M; Kallweit, S; Kardos, A; Kashif, L; Kauer, N; Kim, H; Klees, R; Kramer, M; Krauss, F; Laureys, A; Laurila, S; Lehti, S; Li, Q; Liebler, S; Liu, X; Logan, H E; Luisoni, G; Malberti, M; Maltoni, F; Mawatari, K; Maierhofer, F; Mantler, H; Martin, S; Mastrolia, P; Mattelaer, O; Mazzitelli, J; Mellado, B; Melnikov, K; Meridiani, P; Miller, D J; Mirabella, E; Moch, S O; Monni, P; Moretti, N; Muck, A; Muhlleitner, M; Musella, P; Nason, P; Neu, C; Neubert, M; Oleari, C; Olsen, J; Ossola, G; Peraro, T; Peters, K; Petriello, F; Piacquadio, G; Potter, C T; Pozzorini, S; Prokofiev, K; Puljak, I; Rauch, M; Rebuzzi, D; Reina, L; Rietkerk, R; Rizzi, A; Rotstein-Habarnau, Y; Salam, G P; Sborlini, G; Schissler, F; Schonherr, M; Schulze, M; Schumacher, M; Siegert, F; Slavich, P; Smillie, J M; Stal, O; von Soden-Fraunhofen, J F; Spira, M; Stewart, I W; Tackmann, F J; Taylor, P T E; Tommasini, D; Thompson, J; Thorne, R S; Torrielli, P; Tramontano, F; Tran, N V; Trocsanyi, Z; Ubiali, M; Vanlaer, P; Acosta, M Vazquez; Vickey, T; Vicini, A; Waalewijn, W J; Wackeroth, D; Wagner, C; Walsh, J R; Wang, J; Weiglein, G; Whitbeck, A; Williams, C; Yu, J; Zanderighi, G; Zanetti, M; Zaro, M; Zerwas, P M; Zhang, C; Zirke, T J E; Zuberi, S; Heinemeyer, S

2013-01-01T23:59:59.000Z

399

Measurement of the Jet Momentum Resolution and Search for a light Standard Model Higgs Boson in the H(bb)W(lv) Channel with the CMS Detector at the LHC  

E-Print Network (OSTI)

The Higgs boson is the last particle predicted by the Standard Model which remains undetected. Its potential discovery was a main objective of the construction of the Large Hadron Collider (LHC) at CERN. Its exclusion would necessitate the existence of new physics beyond the Standard Model. A search for the Higgs boson decaying into two bottom quarks in association with the production of a leptonically decaying W boson is presented based on pp collision data recorded with the CMS experiment in 2011, corresponding to an integrated luminosity of L = 4.65 fb?1. Events are selected requiring the presence of an isolated charged lepton (electron or muon), missing transverse energy and two b-jets, which are clustered with the anti-kT jet algorithm at first. The search is performed in a boosted event topology, where both the W boson and the Higgs boson candidates have high momenta and move back-to-back in the transverse detector plane. Artificial Neural Networks are employed to discriminate signal and background ev...

Held, Hauke

400

Search for the Standard Model Higgs Boson in ZH??+?-bb¯ Production with the D0 Detector in 9.7??fb-1 of pp¯ Collisions at s=1.96??TeV  

Science Journals Connector (OSTI)

We present a search for the standard model (SM) Higgs boson produced in association with a Z boson in 9.7??fb-1 of pp¯ collisions collected with the D0 detector at the Fermilab Tevatron Collider at s=1.96??TeV. Selected events contain one reconstructed Z?e+e- or Z??+?- candidate and at least two jets, including at least one jet identified as likely to contain a b quark. To validate the search procedure, we also measure the cross section for ZZ production in the same final state. It is found to be consistent with its SM prediction. We set upper limits on the ZH production cross section times branching ratio for H?bb¯ at the 95% C.L. for Higgs boson masses 90?MH?150??GeV. The observed (expected) limit for MH=125??GeV is 7.1 (5.1) times the SM cross section.

V. M. Abazov et al. (D0 Collaboration)

2012-09-20T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
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401

In what condition can the 125 GeV Higgs boson decay to a pair of on-shell W-bosons?  

E-Print Network (OSTI)

We have determined that the decay of the neutral boson at a mass around 125 GeV into an on-shell W^-W^+-pair in a uniform magnetic field becomes, in principle, possible and the new decay channel of this boson in a magnetic field is allowed by the energy and total angular momentum conservation laws. The required magnetic field strength for observation of the measurable effect is ~10^23 G (or in Teslas ~10^19 T). The existence of the other neutral boson with the spin J=0 and with the other mass is not either excluded in the mass range below 2m_W=160.77 GeV.

Gasimova, Rasmiyya E

2014-01-01T23:59:59.000Z

402

In what condition can the 125 GeV Higgs boson decay to a pair of on-shell W-bosons?  

E-Print Network (OSTI)

We have determined that the decay of the neutral boson at a mass around 125 GeV into an on-shell W^-W^+-pair in a uniform magnetic field becomes, in principle, possible and the new decay channel of this boson in a magnetic field is allowed by the energy and total angular momentum conservation laws. The required magnetic field strength for observation of the measurable effect is ~10^23 G (or in Teslas ~10^19 T). The existence of the other neutral boson with the spin J=0 and with the other mass is not either excluded in the mass range below 2m_W=160.77 GeV.

Rasmiyya E. Gasimova; Vali A. Huseynov

2014-09-12T23:59:59.000Z

403

July 4, 2012: Discovery of a particle "consistent" with Higgs...  

Energy Savers (EERE)

July 4, 2012: Discovery of a particle "consistent" with Higgs Boson July 4, 2012: Discovery of a particle "consistent" with Higgs Boson July 4, 2012: Discovery of a particle...

404

Got a Minute? Which Higgs did we find?  

SciTech Connect

Dr. John Stupak talks about the discovery of the Higgs boson. Did scientists find the Higgs boson predicted back in 1964 or did they find just one of a group of particles, with the others still to be found?

Stupak, John

2014-06-26T23:59:59.000Z

405

Search for associated production of z and Higgs bosons in proton-antiproton collisions at 1.96 TeV  

SciTech Connect

We present a search for associated production of Z and Higgs bosons in 4.2 fb{sup -1} of {bar p}p collisions at {radical}s = 1.96 TeV, produced in RunII of the Tevatron and recorded by the D0 detector. The search is performed in events containing at least two muons and at least two jets. The ZH signal is distinguished from the expected backgrounds by means of multivariate classifiers known as random forests. Binned random forest output distributions are used in comparing the data to background-only and signal+background hypotheses. No excess is observed in the data, so we set upper limits on ZH production with a 95% confidence level.

BackusMayes, John Alexander; /Washington U., Seattle

2010-12-01T23:59:59.000Z

406

A Light Higgs Scalar and a Heavy Gravitino  

Science Journals Connector (OSTI)

......light (O(10 GeV)) neutral Higgs boson. References 1) Nilles H. P...0(10 GeV)) neutral Higgs boson. 23 Supergravity theories necessarily...exis- tence of one light neutral Higgs boson while other scalar particles become......

Toru Goto

1989-07-01T23:59:59.000Z

407

Photon collider Higgs factories  

E-Print Network (OSTI)

The discovery of the Higgs boson (and still nothing else) have triggered appearance of many proposals of Higgs factories for precision measurement of the Higgs properties. Among them there are several projects of photon colliders (PC) without e+e- in addition to PLC based on e+e- linear colliders ILC and CLIC. In this paper, following a brief discussion of Higgs factories physics program I give an overview of photon colliders based on linear colliders ILC and CLIC, and of the recently proposed photon-collider Higgs factories with no e+e- collision option based on recirculation linacs in ring tunnels.

V. I. Telnov

2014-09-19T23:59:59.000Z

408

Kinematics in Vector Boson Fusion  

E-Print Network (OSTI)

The vector boson fusion process leads to two forward/backward jets (tag jets) and the produced state, a Higgs boson in this case, moving slowly in the p-p C.M. frame at the LHC. For the case of Higgs decaying to W+W (W*) with Higgs mass below 180 GeV, the W bosons have low momentum in the Higgs C.M. For the case of W leptonic decays, this fact allows for an approximate reconstruction of the two final state neutrinos. In turn, those solutions then provide additional kinematic cuts against background.

D. Green

2006-03-02T23:59:59.000Z

409

TOP AND HIGGS PHYSICS AT THE HADRON COLLIDERS  

SciTech Connect

This review summarizes the recent results for top quark and Higgs boson measurements from experiments at Tevatron, a proton–antiproton collider at a center-of-mass energy of ? s =1 . 96 TeV, and the Large Hadron Collider, a proton–proton collider at a center- of-mass energy of ? s = 7 TeV. These results include the discovery of a Higgs-like boson and measurement of its various properties, and measurements in the top quark sector, e.g. top quark mass, spin, charge asymmetry and production of single top quark.

Jabeen, Shabnam

2013-10-20T23:59:59.000Z

410

Beyond the standard Higgs after the 125 GeV Higgs discovery  

Science Journals Connector (OSTI)

...behind and beyond the discovery of the Higgs boson...after the 125 GeV Higgs discovery C. Grojean e-mail...behind and beyond the discovery of the Higgs boson...Model up to very high energy, maybe as high as the...fill the universe with dark matter and does not...

2015-01-01T23:59:59.000Z

411

DZero (D0) Experiment Results for Higgs Physics from the Fermilab Tevatron  

DOE Data Explorer (OSTI)

The D0 (DZero) Experiment is a worldwide collaboration of scientists conducting research on the fundamental nature of matter. The experiment is located at the Tevatron Collider, at Fermilab. The research is focused on precise studies of interactions of protons and antiprotons and involves an intense search for subatomic clues that reveal the character of the building blocks of the universe. This web page provides access to Run II research results of the Higgs Physics group, including preliminary, submitted, and published results. Figures and data plots are found in the directories with their respective papers.

412

Invisible Higgs in large extra dimensions  

E-Print Network (OSTI)

We discuss the possibility of detecting a Higgs boson in electron-positron collider experiments if large extra dimensions are realized in nature. In such a case, the Higgs boson can decay invisibly by oscillating into a graviscalar Kaluza-Klein (KK) tower. We show that the search for such a Higgs at an $e^+ e^-$ linear collider entails more complications than are usually thought of in relation to an invisibly decaying Higgs.

Jari Laamanen

2005-05-12T23:59:59.000Z

413

Combined search for the Standard Model Higgs boson using up to 4.9 fb$^{-1}$ of pp collision data at $\\sqrt{s}$ = 7 TeV with the ATLAS detector at the LHC  

E-Print Network (OSTI)

A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb-1 to 4.9 fb-1 of pp collisions collected at sqrt(s) = 7 TeV is presented. The Higgs boson mass ranges 112.9-115.5 GeV, 131-238 GeV and 251-466 GeV are excluded at the 95% confidence level (CL), while the range 124-519 GeV is expected to be excluded in the absence of a signal. An excess of events is observed around mH ~ 126 GeV with a local significance of 3.5 standard deviations (sigma). The local significance of H -> gamma gamma, H -> ZZ(*) -> lll'l' and H -> WW(*) -> lvl'v, the three most sensitive channels in this mass range, are 2.8 sigma, 2.1 sigma and 1.4 sigma, respectively. The global probability for the background to produce such a fluctuation anywhere in the explored Higgs boson mass range 110-600 GeV is estimated to be ~1.4% or, equivalently 2.2 sigma.

Aad, Georges; Abdallah, Jalal; Abdel Khalek, Samah; Abdelalim, Ahmed Ali; Abdesselam, Abdelouahab; Abdinov, Ovsat; Abi, Babak; Abolins, Maris; AbouZeid, Ossama; Abramowicz, Halina; Abreu, Henso; Acerbi, Emilio; Acharya, Bobby Samir; Adamczyk, Leszek; Adams, David; Addy, Tetteh; Adelman, Jahred; Aderholz, Michael; Adomeit, Stefanie; Adragna, Paolo; Adye, Tim; Aefsky, Scott; Aguilar-Saavedra, Juan Antonio; Aharrouche, Mohamed; Ahlen, Steven; Ahles, Florian; Ahmad, Ashfaq; Ahsan, Mahsana; Aielli, Giulio; Akdogan, Taylan; ?kesson, Torsten Paul Ake; Akimoto, Ginga; Akimov, Andrei; Akiyama, Kunihiro; Alam, Mohammad; Alam, Muhammad Aftab; Albert, Justin; Albrand, Solveig; Aleksa, Martin; Aleksandrov, Igor; Alessandria, Franco; Alexa, Calin; Alexander, Gideon; Alexandre, Gauthier; Alexopoulos, Theodoros; Alhroob, Muhammad; Aliev, Malik; Alimonti, Gianluca; Alison, John; Aliyev, Magsud; Allbrooke, Benedict; Allport, Phillip; Allwood-Spiers, Sarah; Almond, John; Aloisio, Alberto; Alon, Raz; Alonso, Alejandro; Alvarez Gonzalez, Barbara; Alviggi, Mariagrazia; Amako, Katsuya; Amaral, Pedro; Amelung, Christoph; Ammosov, Vladimir; Amorim, Antonio; Amorós, Gabriel; Amram, Nir; Anastopoulos, Christos; Ancu, Lucian Stefan; Andari, Nansi; Andeen, Timothy; Anders, Christoph Falk; Anders, Gabriel; Anderson, Kelby; Andreazza, Attilio; Andrei, George Victor; Andrieux, Marie-Laure; Anduaga, Xabier; Angerami, Aaron; Anghinolfi, Francis; Anisenkov, Alexey; Anjos, Nuno; Annovi, Alberto; Antonaki, Ariadni; Antonelli, Mario; Antonov, Alexey; Antos, Jaroslav; Anulli, Fabio; Aoun, Sahar; Aperio Bella, Ludovica; Apolle, Rudi; Arabidze, Giorgi; Aracena, Ignacio; Arai, Yasuo; Arce, Ayana; Arfaoui, Samir; Arguin, Jean-Francois; Arik, Engin; Arik, Metin; Armbruster, Aaron James; Arnaez, Olivier; Arnal, Vanessa; Arnault, Christian; Artamonov, Andrei; Artoni, Giacomo; Arutinov, David; Asai, Shoji; Asfandiyarov, Ruslan; Ask, Stefan; ?sman, Barbro; Asquith, Lily; Assamagan, Ketevi; Astbury, Alan; Astvatsatourov, Anatoli; Aubert, Bernard; Auge, Etienne; Augsten, Kamil; Aurousseau, Mathieu; Avolio, Giuseppe; Avramidou, Rachel Maria; Axen, David; Ay, Cano; Azuelos, Georges; Azuma, Yuya; Baak, Max; Baccaglioni, Giuseppe; Bacci, Cesare; Bach, Andre; Bachacou, Henri; Bachas, Konstantinos; Backes, Moritz; Backhaus, Malte; Badescu, Elisabeta; Bagnaia, Paolo; Bahinipati, Seema; Bai, Yu; Bailey, David; Bain, Travis; Baines, John; Baker, Oliver Keith; Baker, Mark; Baker, Sarah; Banas, Elzbieta; Banerjee, Piyali; Banerjee, Swagato; Banfi, Danilo; Bangert, Andrea Michelle; Bansal, Vikas; Bansil, Hardeep Singh; Barak, Liron; Baranov, Sergei; Barashkou, Andrei; Barbaro Galtieri, Angela; Barber, Tom; Barberio, Elisabetta Luigia; Barberis, Dario; Barbero, Marlon; Bardin, Dmitri; Barillari, Teresa; Barisonzi, Marcello; Barklow, Timothy; Barlow, Nick; Barnett, Bruce; Barnett, Michael; Baroncelli, Antonio; Barone, Gaetano; Barr, Alan; Barreiro, Fernando; Barreiro Guimarães da Costa, João; Barrillon, Pierre; Bartoldus, Rainer; Barton, Adam Edward; Bartsch, Valeria; Bates, Richard; Batkova, Lucia; Batley, Richard; Battaglia, Andreas; Battistin, Michele; Bauer, Florian; Bawa, Harinder Singh; Beale, Steven; Beau, Tristan; Beauchemin, Pierre-Hugues; Beccherle, Roberto; Bechtle, Philip; Beck, Hans Peter; Becker, Sebastian; Beckingham, Matthew; Becks, Karl-Heinz; Beddall, Andrew; Beddall, Ayda; Bedikian, Sourpouhi; Bednyakov, Vadim; Bee, Christopher; Begel, Michael; Behar Harpaz, Silvia; Behera, Prafulla; Beimforde, Michael; Belanger-Champagne, Camille; Bell, Paul; Bell, William; Bella, Gideon; Bellagamba, Lorenzo; Bellina, Francesco; Bellomo, Massimiliano; Belloni, Alberto; Beloborodova, Olga; Belotskiy, Konstantin; Beltramello, Olga; Benary, Odette; Benchekroun, Driss; Bendel, Markus; Benekos, Nektarios; Benhammou, Yan; Benhar Noccioli, Eleonora; Benitez Garcia, Jorge-Armando; Benjamin, Douglas; Benoit, Mathieu; Bensinger, James; Benslama, Kamal; Bentvelsen, Stan; Berge, David; Bergeaas Kuutmann, Elin; Berger, Nicolas; Berghaus, Frank; Berglund, Elina; Beringer, Jürg; Bernat, Pauline; Bernhard, Ralf; Bernius, Catrin; Berry, Tracey; Bertella, Claudia; Bertin, Antonio; Bertinelli, Francesco; Bertolucci, Federico; Besana, Maria Ilaria; Besson, Nathalie; Bethke, Siegfried; Bhimji, Wahid; Bianchi, Riccardo-Maria; Bianco, Michele; Biebel, Otmar; Bieniek, Stephen Paul; Bierwagen, Katharina; Biesiada, Jed; Biglietti, Michela; Bilokon, Halina; Bindi, Marcello; Binet, Sebastien; Bingul, Ahmet; Bini, Cesare; Biscarat, Catherine; Bitenc, Urban; Black, Kevin; Blair, Robert

2012-01-01T23:59:59.000Z

414

Conformal Higgs model: predicted dark energy density  

E-Print Network (OSTI)

Postulated universal Weyl conformal scaling symmetry provides an alternative to the $\\Lambda$CDM paradigm for cosmology. Recent applications to galactic rotation velocities, Hubble expansion, and a model of dark galactic halos explain qualitative phenomena and fit observed data without invoking dark matter. Significant revision of theory relevant to galactic collisions and clusters is implied, but not yet tested. Dark energy is found to be a consequence of conformal symmetry for the Higgs scalar field of electroweak physics. The present paper tests this implication. The conformal Higgs model acquires a gravitational effect described by a modified Friedmann cosmic evolution equation, shown to fit cosmological data going back to the cosmic microwave background epoch. The tachyonic mass parameter of the Higgs model becomes dark energy in the Friedmann equation. A dynamical model of this parameter, analogous to the Higgs mechanism for gauge boson mass, is derived and tested here. An approximate calculation yields a result consistent with the empirical magnitude inferred from Hubble expansion.

R. K. Nesbet

2014-11-03T23:59:59.000Z

415

The Higgs Portal Above Threshold  

E-Print Network (OSTI)

The discovery of the Higgs boson opens the door to new physics interacting via the Higgs Portal, including motivated scenarios relating to baryogenesis, dark matter, and electroweak naturalness. We systematically explore the collider signatures of singlet scalars produced via the Higgs Portal at the 14 TeV LHC and a prospective 100 TeV hadron collider. We focus on the challenging regime where the scalars are too heavy to be produced in the decays of an on-shell Higgs boson, and instead are produced primarily via an off-shell Higgs. Assuming these scalars escape the detector, promising channels include missing energy in association with vector boson fusion, monojets, and top pairs. We forecast the sensitivity of searches in these channels at $\\sqrt{s} = 14$ & 100 TeV and compare collider reach to the motivated parameter space of singlet-assisted electroweak baryogenesis, Higgs Portal dark matter, and neutral naturalness.

Nathaniel Craig; Hou Keong Lou; Matthew McCullough; Arun Thalapillil

2014-11-30T23:59:59.000Z

416

The Higgs Portal Above Threshold  

E-Print Network (OSTI)

The discovery of the Higgs boson opens the door to new physics interacting via the Higgs Portal, including motivated scenarios relating to baryogenesis, dark matter, and electroweak naturalness. We systematically explore the collider signatures of singlet scalars produced via the Higgs Portal at the 14 TeV LHC and a prospective 100 TeV hadron collider. We focus on the challenging regime where the scalars are too heavy to be produced in the decays of an on-shell Higgs boson, and instead are produced primarily via an off-shell Higgs. Assuming these scalars escape the detector, promising channels include missing energy in association with vector boson fusion, monojets, and top pairs. We forecast the sensitivity of searches in these channels at $\\sqrt{s} = 14$ & 100 TeV and compare collider reach to the motivated parameter space of singlet-assisted electroweak baryogenesis, Higgs Portal dark matter, and neutral naturalness.

Craig, Nathaniel; McCullough, Matthew; Thalapillil, Arun

2014-01-01T23:59:59.000Z

417

Measurement of sigma(ppbar->Z) Br(Z->tau+tau-) and search for Higgs bosons decaying to tau+tau- at s**(1/2) = 1.96 TeV  

SciTech Connect

The resonant production of tau-lepton pairs is as interesting for the study of Standard Model (SM) physics as the production of lighter leptons pairs. For new phenomena, such as Higgs boson production or in case new particles beyond the SM would arise, the detection of (resonant) pairs of tau leptons becomes much more interesting. This is due to the fact that tau leptons are much heavier than the other leptons, which increases the chance that these new phenomena would be observed first in this channel. Unfortunately their clean detection is far more difficult than that of muons or electrons. The cross section times branching ratio {sigma}{center_dot} Br for the process p{bar p} {yields} Z {yields} {tau}{sup +}{tau}{sup -} was measured at {radical}s = 1.96 GeV using 1.0 fb{sup -1} of data collected by the D0 experiment. This measurement was performed in the channel in which one of the tau leptons decays to a muon and neutrinos, while the other decays either hadronically or to an electron and neutrinos. A set of 1511 events, of which about 20% estimated background, passed all selection criteria. The trigger and muon reconstruction efficiencies, as well as the efficiency for track reconstruction were obtained from data using the 'tag and probe' method on Z {yields} {mu}{sup +}{mu}{sup -} events. The multijet background was estimated from the sample of events which passed all selection criteria but in which the muon and the tau candidate had the same charge. The W {yields} {mu}{nu} + jets background was modeled by Monte Carlo simulations, but normalized to data. All the other backgrounds, as well as the efficiency for Z {yields} {tau}{sup +}{tau}{sup -} events were estimated using simulated events normalized to the theoretical calculations of cross sections at next-to-leading order or next-to-next-to-leading order. The energy of the tau candidates was corrected for the estimated response of the charged pions in the calorimeter, which is of the order 50-80%. Since the charged pion response in data was not well reproduced by the default simulation of hadronic interactions (Geisha), a different simulation (gCALOR) was used to obtain an estimated charged pion response consistent with the one measured in data. This tau energy correction method makes use of the superior resolution of the track momentum measurement compared to the resolution of the tau candidate energy as measured by the calorimeter, which leads to a better data--simulation agreement and a decrease of 10% in the resolution of the visible mass peak. The result of this measurement is {sigma}(p{bar p} {yields} Z) {center_dot} Br(Z {yields} {tau}{sup +}{tau}{sup -}) = 240 {+-} 8(stat) {+-} 12(syst) {+-} 15(lumi) pb, in good agreement with the theoretical predictions of 241.6{sub -3.2}{sup +3.6} pb [79] or 251.9{sub -12}{sup +5.1} pb [93-95], as well as with other measurements performed by the D0 and CDF experiments in all channels in which the Z boson decays leptonically [96-100]. This is the most precise Z boson cross section measurement to date performed in the tau lepton channel at hadron colliders. The analysis demonstrates the ability of the D0 experiment to identify tau leptons decaying hadronically with good efficiency and high purity, a challenging task in p{bar p} collisions where the number of jets resembling tau leptons is very high. This achievement forms a solid basis for other analyses using hadronic tau lepton decays, such as the search for the Higgs boson decaying into tau-lepton pairs, which was performed for the last part of this thesis.

Galea, Cristina Florina; /Nijmegen U.

2008-01-01T23:59:59.000Z

418

Combination of CDF and D0 results on the W boson mass and width  

SciTech Connect

The results on the direct measurements of the W-boson mass and width, based on the data collected by the Tevatron experiments CDF and D{sup -} at Fermilab are summarized and combined. The CDF Run-0 (1988-1889) and Run-I (1992-1995) results have been re-averaged using the BLUE method and combined with Run-I D{sup -} results and the latest published results from CDF taken from the first period of Run-II (2001-2004). The results are corrected to have consistency between the parton distribution functions and electroweak parameters. The resulting Tevatron averages for the mass and total decay width of the W boson are: M{sub W} = 80432 {+-} 39 MeV and {Lambda}{sub W} = 2056 {+-} 62 MeV. The inclusion of a preliminary Run-II measurement of {Lambda}{sub W} from D{sup -}0 gives {Lambda}{sub W} = 2050 {+-} 58 MeV.

Group, Tevatron Electroweak Working

2008-08-01T23:59:59.000Z

419

The Twin Higgs mechanism and Composite Higgs  

E-Print Network (OSTI)

We combine the Twin Higgs mechanism with the paradigm of Composite Higgs models. In this class of models the Higgs is a pseudo-Nambu-Goldstone boson from a strongly coupled sector near the TeV scale, and it is additionally protected by a discrete symmetry due to the twin mechanism. We discuss the model building issues associated with this setup and quantify the tuning needed to achieve the correct electroweak vacuum and the Higgs mass. In contrast to standard Composite Higgs models, the lightest resonance associated with the top sector is the uncolored mirror top, while the colored top partners can be made parameterically heavier without extra tuning. In some cases, the vector resonances are predicted to lie in the multi-TeV range. We present models where the resonances - both fermions and vectors - being heavier alleviates the pressure on naturalness coming from direct searches demonstrating that theories with low tuning may survive constraints from the Large Hadron Collider.

Low, Matthew; Wang, Lian-Tao

2015-01-01T23:59:59.000Z

420

Charged Higgs Effects on Exclusive Semi-tauonic $\\bbox{B}$ Decays  

E-Print Network (OSTI)

We study effects of charged Higgs boson exchange in the $B$ semileptonic decays $\\bar B \\rightarrow D^{(*)}\\tau\\bar\

Minoru Tanaka

1994-11-28T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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421

March 4, 2013 Chasing the Higgs  

E-Print Network (OSTI)

of the Higgs boson -- the long-sought "God particle." If his rivals were right, it would mean a cascade of modern science:the Higgs boson, a particle whose existence would explain all the others then known at powerful particle colliders, all to no avail. Now it had come down to the Large Hadron Collider, where two

Ellis, Steve

422

(SUSY) Higgs Search at the LHC  

E-Print Network (OSTI)

The discovery of the Standard Model (SM) or supersymmetric (SUSY) Higgs bosons belongs to the main endeavors of the Large Hadron Collider (LHC). In this article the status of the signal and background calculations for Higgs boson production at the LHC is reviewed.

M. Margarete Muhlleitner

2008-10-07T23:59:59.000Z

423

Theoretical Aspects of Higgs Physics at the LHC  

E-Print Network (OSTI)

The strategies recently developed to study Higgs boson properties at the LHC are reviewed. It is shown how to obtain model-independent determinations of couplings to fermions and gauge bosons by exploiting different production and decay channels. We consider the case of Weak Boson Fusion Higgs production with H decaying into b anti-b

Mauro Moretti

2004-01-15T23:59:59.000Z

424

Combined upper limit for SM Higgs at the Tevatron  

SciTech Connect

We combine results from CDF and D0 on direct searches for a standard model (SM) Higgs boson (H) in p{bar p} collisions at the Fermilab Tevatron at {radical}s = 1.96 TeV. Compared to the previous Higgs Tevatron combination, more data and new channels (WH {yields} {tau}{nu}b{bar b}, VH {yields} {tau}{tau}b{bar b}/jj{tau}{tau}, VH {yields} jjb{bar b}, t{bar t}H {yields} t{bar t}b{bar b}) have been added. Most previously used channels have been reanalyzed to gain sensitivity. We use the latest parton distribution functions and gg {yields} H theoretical cross sections when comparing our limits to the SM predictions. With 2.0-3.6 fb{sup -1} of data analyzed at CDF, and 0.9-4.2 fb{sup -1} at D0, the 95%C.L. upper limits on Higgs boson production are a factor of 2.5 (0.86) times the SM cross section for a Higgs boson mass of m{sub H} = 115 (165) GeV/c{sup 2}. Based on simulation, the corresponding median expected upper limits are 2.4 (1.1). The mass range excluded at 95% C.L. for a SM Higgs has been extended to 160 < m{sub H} < 170 GeV/c{sup 2}.

Penning, Bjorn; /Fermilab

2009-01-01T23:59:59.000Z

425

Higgs Physics at CLIC  

E-Print Network (OSTI)

The Compact Linear Collider (CLIC) is an attractive option for a future multi-TeV linear electron-positron collider, offering the potential for a rich precision physics programme, combined with sensitivity to a wide range of new phenomena. The physics reach of CLIC has been studied in the context of three distinct centre-of-mass energies, ?s = 350 GeV, 1.4 TeV and 3.0 TeV. This staged scenario provides an excellent environment for precise studies of the properties of the 126 GeV Higgs boson. Operation at ?s = 350 GeV allows, on the one hand, for a determination of the couplings and width of the Higgs boson in a model-independent manner through the study of the Higgsstrahlung process, and on the other hand, for a study of Higgs bosons produced in W+W? fusion for the most common Higgs decay modes. Operation at higher centre-of-mass energies, ?s = 1.4 TeV and 3 TeV, provides high statistics W+W? fusion samples allowing for high precision measurements of many Higgs couplings and a study of rare Higgs de...

Sicking, E.

2014-01-01T23:59:59.000Z

426

Transverse momentum resummation for Higgs production via gluon fusion in the MSSM  

E-Print Network (OSTI)

The resummed transverse momentum distribution of supersymmetric Higgs bosons produced through gluon fusion at NLO+NLL is presented, including the exact quark and squark mass dependences. Considering various MSSM scenarios, we compare our results to previous ones within the POWHEG approach. We analyze the impact of the bottom loop which becomes the dominant contribution to the gluon fusion cross section for a wide range of the parameter space for the pseudo-scalar and heavy Higgs.

Robert V. Harlander; Hendrik Mantler; Marius Wiesemann

2014-09-01T23:59:59.000Z

427

Search for a Light Charged Higgs Boson in the CMS Experiment in pp Collisions at sqrt(s) = 7 TeV.  

E-Print Network (OSTI)

??In the standard model of particle physics (SM) the masses of the elementary particles are generated by the Higgs mechanism predicting the existence of the… (more)

Kortelainen, Matti

2012-01-01T23:59:59.000Z

428

Effective Field Theory for Higgs Plus Jet Production | Argonne...  

NLE Websites -- All DOE Office Websites (Extended Search)

includes all possible gluon-Higgs dimension-5 and dimension-7 operators to study Higgs boson plus jet production in next-to-leading order QCD. The EFT sheds light on the effect...

429

Search for a Higgs boson decaying into a b-quark pair and produced in association with b quarks in proton–proton collisions at 7 TeV  

Science Journals Connector (OSTI)

Abstract A search for a neutral Higgs boson decaying to a pair of b quarks, and produced in association with at least one additional b quark, is presented. Multijet final states with three jets identified as originating from b quarks, at least one of which may include a non-isolated muon, are studied. The data used in this analysis correspond to an integrated luminosity of 2.7–4.8 fb?1, collected by the CMS experiment in proton–proton collisions at the LHC at a center-of-mass energy of 7 TeV. This search is particularly sensitive to Higgs bosons in scenarios of the Minimal Supersymmetric Model (MSSM) with large values of tan ?. No excess over the predicted background from standard model processes is observed. Stringent upper limits on cross section times branching fraction are derived and interpreted as bounds in the MSSM tan ? and m A parameter-space. Observed 95% confidence level upper limits reach as low as tan ? ? 18 for M A ? 100   GeV .

2013-01-01T23:59:59.000Z

430

Searching Higgs in Noncommutative Electroweak Model at Photon-Photon Collider  

E-Print Network (OSTI)

We discuss the process of Higgs boson production in $\\gamma\\gamma$ collider on noncommutative spacetime and compare the results with large extra dimension in KK graviton channel. Summing all KK mode on IR brane, the affections are in the same order by comparing noncommutatve model prediction. This process is completely forbidden in standard model on unitarity condition and bosonic distribution. In noncommutative theory, the effect is induced by the coordinates noncommutable relation, $[x^{\\mu}, x^{\

Chien Yu Chen

2008-08-31T23:59:59.000Z

431

Statement by U.S. Secretary of Energy Steven Chu on the Higgs Particle |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Statement by U.S. Secretary of Energy Steven Chu on the Higgs Statement by U.S. Secretary of Energy Steven Chu on the Higgs Particle Statement by U.S. Secretary of Energy Steven Chu on the Higgs Particle July 4, 2012 - 8:02am Addthis News Media Contact (202) 586-4940 "I congratulate the thousands of scientists around the globe for their outstanding work in searching for the Higgs boson," said U.S. Secretary of Energy Steven Chu. "Today's announcement on the latest results of this search shows the benefits of sustained investments in basic science by governments around the world. Scientists have been looking for the Higgs particle for more than two decades; these results help validate the Standard Model used by scientists to explain the nature of matter." Background Information on the U.S. Support for the Large Hadron Collider

432

Evidence for Higgs boson Yukawa couplings in the $H\\to\\tau\\tau$ decay mode with the ATLAS detector  

E-Print Network (OSTI)

Results of a search for $H\\to\\tau\\tau$ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 $\\rm{fb}^{-1}$ and 20.3 $\\rm{fb}^{-1}$ at centre-of-mass energies of $\\sqrt{s}$ = 7 TeV and $\\sqrt{s}$ = 8 TeV respectively. All combinations of leptonic ($\\tau \\to \\ell \

The ATLAS collaboration

2014-01-01T23:59:59.000Z

433

The Higgs Singlet extension parameter space in the light of the LHC discovery  

E-Print Network (OSTI)

In this note we propose an overview on the current theoretical and experimental limits on a Higgs singlet extension of the Standard Model. We assume that the Boson which has recently been measured by the LHC experiments is the lightest Higgs boson of such model, while for the second Higgs Boson we consider a mass range of 600 GeV to 1 TeV, i.e. outside the range of the direct searches presented so far. In this light, we study the impact of perturbative unitarity limits, Renormalisation Group Equations analysis and experimental constraints (Electro-Weak Precision Tests, measurements of the light Higgs coupling at the Large Hadron Collider). We show that, in the case of no additional hidden sector contributions, the largest constraints for higher Higgs masses stem from the assumption of perturbativity as well as vacuum stability for scales on the order of the SM metastability scale, and that the allowed mixing range is severely restricted. We discuss implications for current LHC searches in the singlet extension, especially the expected suppression factors for SM-like decays of the heavy Higgs. We present these results in terms of a global scaling factor as well as the total width of the new scalar.

Giovanni Marco Pruna; Tania Robens

2014-02-23T23:59:59.000Z

434

9/24/12 A cosmic whodunit: the case of the Higgs boson 1/5www.statesman.com/opinion/insight/a-cosmic-whodunit-the-case-of-the-higgs-2465209.html?viewAs...  

E-Print Network (OSTI)

with mass, and why do the media (but only a few scientists) call the Higgs the "God particle"? To understand and blogs around the world. Scientists using two separate and enormous particle accelerators -- the Tevatron

Toback, David

435

Identification of b-jets and investigation of the discovery potential of a Higgs boson in the $WH --> l \  

E-Print Network (OSTI)

The Standard Model of particle physics describes three of the four known fundamental interactions between the elementary particles: the electromagnetic, weak and strong forces.It provides an extremely accurate description of the electroweak interactions up to the energy scales so far explored in high energy physics experiments. The Large Hadron Collider (LHC), which is presently starting to operate, will provide proton-proton collisions with an unprecedented centre-of-mass energy of $\\sqrt{s} = 14~{\\rm TeV}$ and with instantaneous luminosities of up to $10^{34}~{\\rm cm^{-2}s^{-1}}$, and is therefore ideally suited to explore the TeV energy domain. Two multipurpose experiments, ATLAS and CMS, were built to analyse the collisions. The high instantaneous luminosities achievable at the LHC will result in a significant contamination of the signal processes by additional soft proton-proton collisions, usually known as pile-up interactions. In the course of this thesis several algorithms were developed for the ATLAS...

Piacquadio, Giacinto

2010-01-01T23:59:59.000Z

436

Smoking-gun signatures of little Higgs models  

E-Print Network (OSTI)

Little Higgs models predict new gauge bosons, fermions and scalars at the TeV scale that stabilize the Higgs mass against quadratically divergent one-loop radiative corrections. We categorize the many little Higgs models into two classes based on the structure of the extended electroweak gauge group and examine the experimental signatures that identify the little Higgs mechanism in addition to those that identify the particular little Higgs model. We find that by examining the properties of the new heavy fermion(s) at the LHC, one can distinguish the structure of the top quark mass generation mechanism and test the little Higgs mechanism in the top sector. Similarly, by studying the couplings of the new gauge bosons to the light Higgs boson and to the Standard Model fermions, one can confirm the little Higgs mechanism and determine the structure of the extended electroweak gauge group.

Tao Han; Heather E. Logan; Lian-Tao Wang

2005-06-29T23:59:59.000Z

437

Search for doubly charged Higgs boson pair production in the decay to mu(+)mu(+)mu(-)mu(-) in p(p)over-bar collisions at root s=1.96 TeV  

E-Print Network (OSTI)

. Mishra, 46 J. Mitrevski, 64 N. Mokhov, 46 J. Molina, 3 N. K. Mondal, 26 H. E. Montgomery, 46 R.W. Moore, 5 M. Mostafa, 1 G. S. Muanza, 18 M. Mulders, 46 Y. D. Mutaf, 66 E. Nagy, 13 F. Nang, 41 141801-1 0031-9007=04=93(14)=141801(8)$22.50 ? 2004... limits of M.0133H .0006.0006 L .0134>118:4 GeV=c 2 and M.0133H .0006.0006 R .0134>98:2 GeV=c 2 are set for left-handed and right-handed doubly charged Higgs bosons, respectively, assuming 100% branching into muon pairs. DOI: 10.1103/PhysRevLett.93...

Baringer, Philip S.; Bean, Alice; Christofek, L.; Coppage, Don; Gardner, J.; Hebert, C.; Hensel, Carsten; Jabeen, S.; Wilson, Graham Wallace

2004-10-01T23:59:59.000Z

438

Off-shell Effects and the Higgs Width | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

There has been a great deal of recent interest in the off-shell properties of the Higgs boson in VV decays, and in particular, the extraction of Higgs width constraints from...

439

Neutral Higgs-pair Production at one-loop from a Generic 2HDM  

E-Print Network (OSTI)

We present a one-loop analysis of the pairwise production of neutral Higgs bosons (h0A0, H0A0) at linear colliders, such as the ILC and CLIC, within the general Two-Higgs-Doublet Model (2HDM). We single out sizable radiative corrections, which can well reach the level of 50 % and may be either positive (typically for \\sqrt{s} \\sim 0.5 TeV) and negative (for \\sqrt{s} of 1 TeV and above). These large quantum effects, obtained in full agreement with the current phenomenological bounds and the stringent theoretical constraints on the parameter space of the model, can be traced back to the enhancement capabilities of the triple-Higgs self-interactions -- a trademark feature of the 2HDM, with no counterpart in e.g. the Minimal Supersymmetric Standard Model. In the most favorable scenarios, the Higgs-pair cross sections may be boosted up to barely 30 fb at the fiducial center-of-mass energy of 500 GeV -- amounting to a few thousand events per 500 inverse femtobarn of integrated luminosity. We also compare these results with several complementary double and triple Higgs-boson production mechanisms at order \\alpha^3_{ew} and leading \\alpha^4_{ew}, and we spotlight a plethora of potentially distinctive signatures of a Two-Higgs-Doublet structure of non-supersymmetric nature.

David Lopez-Val; Joan Sola

2010-01-04T23:59:59.000Z

440

E-Print Network 3.0 - anomalous neutral gauge Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

to the electroweak gauge boson quartic couplings, growing quadratically with the Higgs boson mass, is reviewed... . The potential of the CERN Large Hadron Collider and e+ e-...

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

E-Print Network 3.0 - anomalous triple gauge Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

to the electroweak gauge boson quartic couplings, growing quadratically with the Higgs boson mass, is reviewed... . The potential of the CERN Large Hadron Collider and e+ e-...

442

Gauge-Higgs unification at CERN LHC  

Science Journals Connector (OSTI)

The Higgs boson production by the gluon fusion and its decay into two photons at the LHC are investigated in the context of the gauge-Higgs unification scenario. The qualitative behaviors for these processes in the gauge-Higgs unification are quite distinguishable from those of the standard model and the universal extra dimension scenario because of the overall sign difference for the effective couplings induced by one-loop corrections through the Kaluza-Klein modes. For the Kaluza-Klein mode mass smaller than 1 TeV, the Higgs production cross section and its branching ratio into two photons are sizably deviated from those in the standard model. Associated with the discovery of the Higgs boson, this deviation may be measured at the LHC.

Nobuhito Maru and Nobuchika Okada

2008-03-17T23:59:59.000Z

443

Higgs Production $CP$ Studies in $e^{-}e^{-}$ Collisions  

E-Print Network (OSTI)

We review the production of scalar Higgs-like particles in high-energy electron-electron collisions, via the fusion of electroweak gauge bosons. The emphasis is on how to distinguish a CP-even from a CP-odd Higgs particle. Among the more significant differences, we find that in the CP-odd case, the Higgs spectrum is much harder, and the dependence of the total cross section on the product of the polarizations of the two beams is much stronger, than in the CP-even case. We also briefly discuss parity violation, and the production of charged Higgs bosons.

Boe, C A; Osland, P; Zhang, J; Zhang, Jian-zu

1999-01-01T23:59:59.000Z

444

Higgs Production: CP Studies in e-e- Collisions  

E-Print Network (OSTI)

We review the production of scalar Higgs-like particles in high-energy electron-electron collisions, via the fusion of electroweak gauge bosons. The emphasis is on how to distinguish a CP-even from a CP-odd Higgs particle. Among the more significant differences, we find that in the CP-odd case, the Higgs spectrum is much harder, and the dependence of the total cross section on the product of the polarizations of the two beams is much stronger, than in the CP-even case. We also briefly discuss parity violation, and the production of charged Higgs bosons.

C. A. Boe; O. M. Ogreid; P. Osland; Jian-zu Zhang

1998-11-29T23:59:59.000Z

445

The LHC Search for The CP-odd Higgs by The Jet Substructure Analysis  

E-Print Network (OSTI)

The LHC searches for the CP-odd Higgs boson is studied (with masses from 300 GeV to 1 TeV) in the context of the general two-Higgs-doublet model. With the discovery of the 125 GeV Higgs boson at the LHC, we highlight one promising discovery channel of the hZ. This channel can become significant after the global signal fitting to the 125 GeV Higgs boson in the general two-Higgs-doublet model. It is particularly important in the scenario where two CP-even Higgs bosons in the two-Higgs-doublet model have the common mass of 125 GeV. Since the final states involve a Standard-Model-like Higgs boson, we apply the jet substructure analysis of the fat Higgs jet in order to eliminate the Standard Model background sufficiently. After performing the kinematic cuts, we present the LHC search sensitivities for the CP-odd Higgs boson with mass up to 1 TeV via this channel.

Chen, Ning; Liu, Yandong; Liu, Zuowei

2014-01-01T23:59:59.000Z

446

Neutral Scalar Higgs Masses and Production Cross Sections in an Extended Supersymmetric Standard Model  

E-Print Network (OSTI)

Upper bounds on the three neutral scalar Higgs masses are considered in the supersymmetric standard model with a gauge singlet Higgs field. When the lightest Higgs is singlet-dominated the second lightest Higgs is shown to lie near or below the theoretical upper bound on the lightest Higgs mass. We also consider detectability of these Higgs bosons at a future $e^+ e^-$ linear collider with $\\sqrt{s}\\sim 300 $ GeV and show that at least one of the neutral scalar Higgs has a production cross section larger than 0.04~pb.

Jun-ichi Kamoshita; Yasuhiro Okada; Minoru Tanaka

1994-02-14T23:59:59.000Z

447

Resummed Higgs $p_T$ distribution at NNLL + NNLO in bottom-quark annihilation  

E-Print Network (OSTI)

The resummed transverse-momentum distribution for Higgs bosons produced via bottom-quark annihilation at the LHC is presented. Our results are obtained in the five-flavor scheme to NNLO+NNLL accuracy. We present a theoretical prediction which consistently matches the cross section at small and large transverse momenta. Theoretical uncertainties are derived from a variation of the unphysical scales entering the calculation. Their size is significantly reduced with respect to lower orders.

Harlander, Robert; Wiesemann, Marius

2014-01-01T23:59:59.000Z

448

Resummed Higgs $p_T$ distribution at NNLL + NNLO in bottom-quark annihilation  

E-Print Network (OSTI)

The resummed transverse-momentum distribution for Higgs bosons produced via bottom-quark annihilation at the LHC is presented. Our results are obtained in the five-flavor scheme to NNLO+NNLL accuracy. We present a theoretical prediction which consistently matches the cross section at small and large transverse momenta. Theoretical uncertainties are derived from a variation of the unphysical scales entering the calculation. Their size is significantly reduced with respect to lower orders.

Robert Harlander; Anurag Tripathi; Marius Wiesemann

2014-07-11T23:59:59.000Z

449

Signatures of Double Charged Higgs in $SU(3)_L\\otimes U(1)_N$ model  

E-Print Network (OSTI)

The scalar sector of the simplest version of the 3-3-1 electroweak models is constructed with three Higgs triplets only. We show that a relation involving two of the constants of the Higgs potential, two vacuum expectation values of the neutral scalars and the mass of the doubly charged Higgs boson leads to important information concerning the signals of this scalar particle.

J. E. Cieza Montalvo; Nelson V. Cortez Jr.; Mauro D. Tonasse

2006-10-21T23:59:59.000Z

450

Big Mysteries: The Higgs Mass  

SciTech Connect

With the discovery of what looks to be the Higgs boson, LHC researchers are turning their attention to the next big question, which is the predicted mass of the newly discovered particles. When the effects of quantum mechanics is taken into account, the mass of the Higgs boson should be incredibly high...perhaps upwards of a quadrillion times higher than what was observed. In this video, Fermilab's Dr. Don Lincoln explains how it is that the theory predicts that the mass is so large and gives at least one possible theoretical idea that might solve the problem. Whether the proposed idea is the answer or not, this question must be answered by experiments at the LHC or today's entire theoretical paradigm could be in jeopardy.

Lincoln, Don

2014-04-28T23:59:59.000Z

451

Beyond the Standard Model Higgs at LHC  

E-Print Network (OSTI)

Models of Beyond the Standard Model (BSM) physics, like the Minimal Supersymmetric Standard Model (MSSM), often involve an extended Higgs sector, giving rise to extra neutral or charged Higgs bosons. The discovery reach expected from simulation studies for such additional Higgs particles is presented for the ATLAS, CMS and FP420 detectors at the LHC. Emphasis is put on production and decay modes involving heavy flavour b and tau particles, which are enhanced in large regions of BSM parameter space. The LHC experiments are indeed particularly well equipped to tackle final states containing heavy flavour.

Steven Lowette; for the ATLAS; CMS; FP420 Collaborations

2008-10-20T23:59:59.000Z

452

NLO QCD CORRECTIONS TO HADRONIC HIGGS PRODUCTION WITH HEAVY QUARKS.  

SciTech Connect

The production of a Higgs boson in association with a pair of t{bar t} or b{bar b} quarks plays a very important role at both the Tevatron and the Large Hadron Collider. The theoretical prediction of the corresponding cross sections has been improved by including the complete next-to-leading order QCD corrections. After a brief description of the most relevant technical aspects of the calculation, we review the results obtained for both the Tevatron and the Large Hadron Collider.

DAWSON,S.; JACKSON,C.; ORR,L.; REINA,L.; WACHEROTH,D.

2003-07-02T23:59:59.000Z

453

Higgs, Binos and Gluinos: Split Susy within Reach  

SciTech Connect

Recent results from the LHC for the Higgs boson with mass between 142 GeV {approx}< m{sub h{sup 0}} {approx}< 147 GeV points to PeV-scale Split Supersymmetry. This article explores the consequences of a Higgs mass in this range and possible discovery modes for Split Susy. Moderate lifetime gluinos, with decay lengths in the 25 {micro}m to 10 yr range, are its imminent smoking gun signature. The 7TeV LHC will be sensitive to the moderately lived gluinos and trilepton signatures from direct electroweakino production. Moreover, the dark matter abundance may be obtained from annihilation through an s-channel Higgs resonance, with the LSP almost purely bino and mass m{sub {chi}{sub 1}{sup 0}} {approx_equal} 70 GeV. The Higgs resonance region of Split Susy has visible signatures in dark matter direct and indirect detection and electric dipole moment experiments. If the anomalies go away, the majority of Split Susy parameter space will be excluded.

Alves, Daniele S.M.; Izaguirre, Eder; /SLAC /Stanford U., Phys. Dept.; Wacker, Jay G.; /SLAC /Stanford U., ITP

2012-09-14T23:59:59.000Z

454

Invisible Higgs Decays from Higgs Graviscalar Mixing  

E-Print Network (OSTI)

We recompute the invisible Higgs decay width arising from Higgs-graviscalar mixing in the ADD model, comparing the original derivation in the non-diagonal mass basis to that in a diagonal mass basis. The results obtained are identical (and differ by a factor of 2 from the original calculation) but the diagonal-basis derivation is pedagogically useful for clarifying the physics of the invisible width from mixing. We emphasize that both derivations make it clear that a direct scan in energy for a process such as $WW\\to WW$ mediated by Higgs plus graviscalar intermediate resonances would follow a {\\it single} Breit-Wigner form with total width given by $\\Gamma^{tot}=\\Gamma_h^{SM}+\\Gamma_{invisible}$. We also compute the additional contributions to the invisible width due to direct Higgs to graviscalar pair decays. We find that the invisible width due to the latter is relatively small unless the Higgs mass is comparable to or larger than the effective extra-dimensional Planck mass.

Daniele Dominici; John F. Gunion

2009-02-09T23:59:59.000Z

455

Phenomenology of the left-right twin Higgs model  

SciTech Connect

The twin Higgs mechanism was proposed recently to solve the little hierarchy problem. We study the implementation of the twin Higgs mechanism in left-right models. At the TeV scale, heavy quark and gauge bosonsappear, with rich collider phenomenology. In addition, there are extra Higgs bosons, some of which couple to both the standard model fermion sector and the gauge sector, while others couple to the gauge bosons only. We present the particle spectrum and study the general features of the collider phenomenology of this class of model at the Large Hadron Collider.

Goh, Hock-Seng; Goh, Hock-Seng; Su, Shufang

2006-11-02T23:59:59.000Z

456

Boson competition lifts prospects for LHC  

Science Journals Connector (OSTI)

... Higgs boson had increased his enthusiasm for the con-struction of the Large Hadron Collider (LHC) being planned for the European Laboratory for Particle Physics (CERN) in Geneva spe- ... even further in order to pay for their participation in the experimental programme on the LHC. Even so, they are warning that paying for the construction programme within current budget ...

David Dickson

1993-09-09T23:59:59.000Z

457

Higgs self coupling measurement in e+e- collisions at center-of-mass energy of 500 GeV  

E-Print Network (OSTI)

Feasibility of the measurement of the trilinear self-couplings of the Higgs boson is studied. Such a measurement would experimentally determine the structure of the Higgs potential. Full hadronic and semi-leptonic final states of the double-Higgs strahlung have been investigated.

C. Castanier; P. Gay; P. Lutz; J. Orloff

2001-01-18T23:59:59.000Z

458

Thermal gauge boson masses of the electroweak theory in the broken phase  

Science Journals Connector (OSTI)

Thermal effects in the broken phase of the electroweak theory are studied in the strongly interacting Higgs boson limit. In that limit and at the tree level the bosonic sector of the theory is a gauged non-linear sigma model. The associated one-loop thermal effective action for soft fields is then computed by using the background field method together with the Stueckelberg formalism. This effective action describes thermal corrections to the masses of the gauge bosons W, Z and the photon. It is the proper generalization of the hard thermal effective action of a Yang-Mills theory when there is a Higgs mechanism for a heavy Higgs particle.

Cristina Manuel

1998-05-19T23:59:59.000Z

459

Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables  

E-Print Network (OSTI)

This Report summarizes the results of the first 10 months' activities of the LHC Higgs Cross Sections Working Group. The main goal of the working group was to present the status-of-art on Higgs Physics at the LHC integrating all new results that have appeared in the last few years. The Report is more than a mere collection of the proceedings of the general meetings. The subgroups have been working in different directions. An attempt has been made to present the first Report from these subgroups in a complete and homogeneous form. The subgroups' contributions correspondingly comprise the main parts of the Report. A significant amount of work has been performed in providing higher-order corrections to the Higgs-boson cross sections and pinning down the theoretical uncertainty of the Standard Model predictions. This Report comprises explicit numerical results on total cross sections, leaving the issues of event selection cuts and differential distributions to future publications. The subjects for further study are identified.

LHC Higgs Cross Section Working Group; S. Dittmaier; C. Mariotti; G. Passarino; R. Tanaka; J. Baglio; P. Bolzoni; R. Boughezal; O. Brein; C. Collins-Tooth; S. Dawson; S. Dean; A. Denner; S. Farrington; M. Felcini; M. Flechl; D. de Florian; S. Forte; M. Grazzini; C. Hackstein; T. Hahn; R. Harlander; T. Hartonen; S. Heinemeyer; J. Huston; A. Kalinowski; M. Krämer; F. Krauss; J. S. Lee; S. Lehti; F. Maltoni; K. Mazumdar; S. -O. Moch; A. Mück; M. Mühlleitner; P. Nason; C. Neu; C. Oleari; J. Olsen; S. Palmer; F. Petriello; G. Piacquadio; A. Pilaftsis; C. T. Potter; I. Puljak; J. Qian; D. Rebuzzi; L. Reina; H. Rzehak; M. Schumacher; P. Slavich; M. Spira; F. Stöckli; R. S. Thorne; M. Vazquez Acosta; T. Vickey; A. Vicini; D. Wackeroth; M. Warsinsky; M. Weber; G. Weiglein; C. Weydert; J. Yu; M. Zaro; T. Zirke

2011-01-03T23:59:59.000Z

460

Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables  

E-Print Network (OSTI)

This Report summarizes the results of the first 10 months' activities of the LHC Higgs Cross Sections Working Group. The main goal of the working group was to present the status-of-art on Higgs Physics at the LHC integrating all new results that have appeared in the last few years. The Report is more than a mere collection of the proceedings of the general meetings. The subgroups have been working in different directions. An attempt has been made to present the first Report from these subgroups in a complete and homogeneous form. The subgroups' contributions correspondingly comprise the main parts of the Report. A significant amount of work has been performed in providing higher-order corrections to the Higgs-boson cross sections and pinning down the theoretical uncertainty of the Standard Model predictions. This Report comprises explicit numerical results on total cross sections, leaving the issues of event selection cuts and differential distributions to future publications. The subjects for further study a...

Dittmaier, S; Passarino, G; Tanaka, R; Baglio, J; Bolzoni, P; Boughezal, R; Brein, O; Collins-Tooth, C; Dawson, S; Dean, S; Denner, A; Farrington, S; Felcini, M; Flechl, M; de Florian, D; Forte, S; Grazzini, M; Hackstein, C; Hahn, T; Harlander, R; Hartonen, T; Heinemeyer, S; Huston, J; Kalinowski, A; Krämer, M; Krauss, F; Lee, J S; Lehti, S; Maltoni, F; Mazumdar, K; Moch, S -O; Mück, A; Mühlleitner, M; Nason, P; Neu, C; Oleari, C; Olsen, J; Palmer, S; Petriello, F; Piacquadio, G; Pilaftsis, A; Potter, C T; Puljak, I; Qian, J; Rebuzzi, D; Reina, L; Rzehak, H; Schumacher, M; Slavich, P; Spira, M; Stöckli, F; Thorne, R S; Acosta, M Vazquez; Vickey, T; Vicini, A; Wackeroth, D; Warsinsky, M; Weber, M; Weiglein, G; Weydert, C; Yu, J; Zaro, M; Zirke, T

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "higgs boson results" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Higgs Bosons at the Fermilab Tevatron  

E-Print Network (OSTI)

The Wjj background has increased by 70%. This decreases the significance of the WH signal somewhat. The significance of the ZH signal remains about the same.

A. Stange; W. Marciano; S. Willenbrock

1993-11-15T23:59:59.000Z

462

Quantum dynamics of attractive versus repulsive bosonic Josephson junctions: Bose-Hubbard and full-Hamiltonian results  

SciTech Connect

The quantum dynamics of one-dimensional bosonic Josephson junctions with attractive and repulsive interparticle interactions is studied by using the Bose-Hubbard model and by numerically exact computations of the full many-body Hamiltonian. A symmetry present in the Bose-Hubbard Hamiltonian dictates an equivalence between the evolution in time of the survival probability and the fragmentation of attractive and repulsive Josephson junctions with attractive and repulsive interactions of equal magnitude. The full many-body Hamiltonian does not possess this symmetry and, consequently, the dynamics of the attractive and repulsive junctions are different.

Sakmann, Kaspar; Streltsov, Alexej I.; Alon, Ofir E.; Cederbaum, Lorenz S. [Theoretische Chemie, Physikalisch-Chemisches Institut, Universitaet Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg (Germany)

2010-07-15T23:59:59.000Z

463

Search for MSSM Higgs decaying to tau pairs in ppbar collision at s**(1/2) = 1.96 TeV at CDF  

SciTech Connect

This thesis presents the search for neutral Minimal Supersymmetric extension of Standard Model (MSSM) Higgs bosons decaying to tau pairs where one of the taus decays leptonically, and the other one hadronically. CDF Run II data with L{sub int} = 310 pb{sup -1} are used. There is no evidence of MSSM Higgs existence, which results in the upper limits on {sigma}(p{bar p} {yields} {phi}) x BR({phi} {yields} {tau}{tau}) in m{sub A} range between 115 and 250 GeV. These limits exclude some area in tan {beta} vs m{sub A} parameter space.

Jang, Dongwook; /Rutgers U., Piscataway; ,

2006-05-01T23:59:59.000Z

464

Mono-Higgs Detection of Dark Matter at the LHC  

E-Print Network (OSTI)

Motivated by the recent discovery of the Higgs boson, we investigate the possibility that a missing energy plus Higgs final state is the dominant signal channel for dark matter at the LHC. We consider examples of higher-dimension operators where a Higgs and dark matter pair are produced through an off-shell Z or photon, finding potential sensitivity at the LHC to cutoff scales of around a few hundred GeV. We generalize this production mechanism to a simplified model by introducing a Z' as well as a second Higgs doublet, where the pseudoscalar couples to dark matter. Resonant production of the Z' which decays to a Higgs plus invisible particles gives rise to a potential mono-Higgs signal. This may be observable at the 14 TeV LHC at low tan beta and when the Z' mass is roughly in the range 600 GeV to 1.3 TeV.

Berlin, Asher; Wang, Lian-Tao

2014-01-01T23:59:59.000Z

465

Mono-Higgs Detection of Dark Matter at the LHC  

E-Print Network (OSTI)

Motivated by the recent discovery of the Higgs boson, we investigate the possibility that a missing energy plus Higgs final state is the dominant signal channel for dark matter at the LHC. We consider examples of higher-dimension operators where a Higgs and dark matter pair are produced through an off-shell Z or photon, finding potential sensitivity at the LHC to cutoff scales of around a few hundred GeV. We generalize this production mechanism to a simplified model by introducing a Z' as well as a second Higgs doublet, where the pseudoscalar couples to dark matter. Resonant production of the Z' which decays to a Higgs plus invisible particles gives rise to a potential mono-Higgs signal. This may be observable at the 14 TeV LHC at low tan beta and when the Z' mass is roughly in the range 600 GeV to 1.3 TeV.

Asher Berlin; Tongyan Lin; Lian-Tao Wang

2014-02-27T23:59:59.000Z

466

Ruling Out a Strongly-Interacting Standard Higgs Model  

E-Print Network (OSTI)

Previous work has suggested that perturbation theory is unreliable for Higgs- and Goldstone-boson scattering, at energies above the Higgs mass, for relatively small values of the Higgs quartic coupling $\\lambda(\\mu)$. By performing a summation of nonlogarithmic terms, we show that perturbation theory is in fact reliable up to relatively large coupling. This eliminates the possibility of a strongly-interacting standard Higgs model at energies above the Higgs mass, complementing earlier studies which excluded strong interactions at energies near the Higgs mass. The summation can be formulated in terms of an appropriate scale in the running coupling, $\\mu=\\sqrt{s}/e\\approx\\sqrt{s}/2.7$, so it can easily be incorporated in renormalization-group improved tree-level amplitudes as well as higher-order calculations.

Kurt Riesselmann; Scott Willenbrock

1996-08-09T23:59:59.000Z

467

HiggsReception  

NLE Websites -- All DOE Office Websites (Extended Search)

GREAT CELEBRITY RECEPTION: HIGGS SIMULATION GREAT CELEBRITY RECEPTION: HIGGS SIMULATION FOR THE TEACHER DESCRIPTION In an effort to make the classic Higgs mechanism party analogy more interactive, this simulation is set up for 20-40 students. This is also a great opportunity to develop student understanding of inertia. Teachers could introduce the party cartoon before the doing the simulation before this activity, but I believe after is better. STANDARDS National Science Education Standards (U.S. National Research Council) * Physical Science Content Standard B: As a result of the activities . . . students should develop an understanding of: o Motion and forces. o Interactions of energy and matter. LEARNING OUTCOMES * Describe mass in terms of the relative acceleration of an object.

468

Higgs EVents  

NLE Websites -- All DOE Office Websites (Extended Search)

A Higgs Event A Higgs Event Notes: H and W are short-lived. Look for accomplices—"daughter" or "granddaughter" particles. (Note example of data on the right.) H may decay to 2 b quarks which fragment into 2 B mesons which decay quickly into lots of particles. Look for jet of particles coming from same point for a B. W may decay into electron and neutrino or muon and neutrino. (Neutrinos are "stealth" particles with really light mass. Aren't seen in CDF. Computers calculate "missing neutrino momentum"; indicated with red arrow.) event computer-generated data « Back to the Higgs Project Contact: Thomas Jordan - jordant@fnal.gov Web Maintainer: qnet-webmaster@fnal.gov Last Update: January 13, 2002 http://quarknet.fnal.gov/run2/hdecay1

469

Multi-Boson Correlation Interferometry and Boson Sampling in Time  

E-Print Network (OSTI)

We develop a general description of multi-boson interference based on correlated measurements in arbitrary passive linear interferometers for single input bosons with arbitrary temporal distributions. Our results allow us to fully describe boson sampling in time at the output of a random interferometer, in which the sampling takes place not only over the interferometer output ports but also over the joint-detection times. For any joint detection, both the time-dependent probability density and the time-averaged probability can be expressed by the permanents of matrices depending on the interferometer evolution and on the boson temporal distributions.

Vincenzo Tamma; Simon Laibacher

2014-10-29T23:59:59.000Z

470

E-Print Network 3.0 - aleph au lep Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

- ALEPH also had a short during a beam loss in July... : The Standard Model; Higgs Boson Higgs Production at LEP2 Hints of a Signal Future ... Source: Experimental High...

471

Natural extensions of electroweak geometry and Higgs interactions  

E-Print Network (OSTI)

We explore the possibility that the Higgs boson of the standard model be actually a member of a larger family, by showing that a more elaborate internal structure naturally arises from geometrical arguments, in the context of a partly original handling of gauge fields which was put forward in previous papers. A possible mechanism yielding the usual Higgs potential is proposed. New types of point interactions, arising in particular from two-spinor index contractions, are shown to be allowed.

Daniel Canarutto

2014-12-10T23:59:59.000Z

472

Constraining CP-violating Higgs Sectors at the LHC using gluon fusion  

E-Print Network (OSTI)

We investigate the constraints that the LHC can set on a 126 GeV Higgs boson that is an admixture of CP eigenstates. Traditional analyses rely on Higgs couplings to massive vector bosons, which are suppressed for CP-odd couplings, so that these analyses have limited sensitivity. Instead we focus on Higgs production in gluon fusion, which occurs at the same order in the strong coupling for both CP-even and -odd couplings. We study the Higgs plus two jet final state followed by Higgs decay into a pair of tau leptons. We show that using the 8 TeV dataset it is possible to rule out the pure CP-odd hypothesis in this channel alone at nearly 95\\% C.L, assuming that the Higgs is CP-even. We also provide projected limits for the 14 TeV LHC run.

Matthew J. Dolan; Philip Harris; Martin Jankowiak; Michael Spannowsky

2014-06-12T23:59:59.000Z

473

Phenomenology of The Left-Right Twin Higgs Model  

E-Print Network (OSTI)

The twin Higgs mechanism has recently been proposed to solve the little hierarchy problem. We study the implementation of the twin Higgs mechanism in left-right models. At TeV scale, heavy quark and gauge bosons appear, with rich collider phenomenology. In addition, there are extra Higgses, some of which couple to both the Standard Model fermion sector and the gauge sector, while others couple to the gauge bosons only. We present the particle spectrum, and study the general features of the collider phenomenology of this class of model at the Large Hadron Collider.

Hock-Seng Goh; Shufang Su

2007-04-30T23:59:59.000Z

474

E-Print Network 3.0 - ambs biography lhc Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

far).... the top quark... (Bs oscillations) The LHC will discover (perhaps)... the Higgs boson supersymmetric particles ... Source: Schmitt, Michael - Department of Physics and...

475

Measurements of Vector Bosons Produced in Association with Jets  

SciTech Connect

The latest D0 and CDF measurements of the W + jets and Z/{gamma}* + jets processes are described, along with a discussion of the comparisons that have been made to LO and NLO perturbative QCD predictions. The direct production of W{sup {+-}}/Z bosons in association with jets is a process of crucial importance at hadron collider experiments. The presence of a