Summary:  collider experi- ments below threshold. If a leptoquark couples to fermions more than a single generation... that a leptoquark state cou- ples only to a single generation in a chiral interaction, where indirect limits become... . Leptoquark states which couple only to the first (second, ...

Source: Lawrence Berkeley National Laboratory, Computational Research Division, Distributed Systems Department, Data Intensive Distributed Computing Group

Collection: Computer Technologies and Information Sciences

Summary:  -to-leading-order theory to set 95% C.L. lower limits on the mass of a first-generation scalar leptoquark of 225, 204... of three generations of doublets of quarks and leptons suggests leptoquarks as a possible reason... on the mass of a first-generation leptoquark ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  Search for first-generation scalar and vector leptoquarks V. M. Abazov,23 B. Abbott,58 A... for the pair production of first-generation scalar and vector leptoquarks in the eejj and e jj channels... on the mass of a first-generation scalar leptoquark of 225, 204, and ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  of first generation scalar leptoquarks in the eejj channel using the full data set 123 pb21 collected... a lower limit on the mass of a first generation scalar leptoquark of 225 GeV c2 . The results... , only leptoquarks which couple within a single generation are ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  lepton generation are considered. No evidence for leptoquark pair production is observed. Lower limits... fermions [3], so that # ij couples a leptoquark to an i th generation lepton and a j th generation quark... with leptoquark single production, where a first ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  only leptoquark decays involving a single lepton generation are considered. No evidence for leptoquark... coupling can carry generation indices for the two fermions [3], so that # ij couples a leptoquark to an i... th generation lepton and a j th ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  AND LEPTOQUARKS AT THERA Aleksander Filip ›arnecki Institute of Experimental Physics, Warsaw University Ho»a 69... 2.8 TeV can be probed. THERA will be the best machine to study leptoquark properties, for leptoquark... masses up to about 1 TeV. It will be sensitive to the leptoquark Yukawa couplings down ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  LQ (LQ2) l Search for 1st Generation LQ: # (LQ1) (LQ1) ® (eq)(eq) (b=1) # (LQ1) (LQ1) ® (eq)(nq) (b... phenomena Ü 3 generations #12; Pushpa Bhat 4 VIII Lomonosov Conf. Aug. 1997 Leptoquarks (contd.) l... Major Backgrounds: v Top, W/Z + 2 jets, QCD multijets n t n t bb Search 3rd ...

Source: Bhat, Pushpalatha - Fermi National Accelerator Laboratory

Collection: Physics

Summary:  or photon pairs. Results from leptoquark searches are presented for three generations of leptoquarks... changing neutral currents imply that a leptoquark can only couple within a single generation of leptons... and quarks, i.e. a #28;rst generation ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  for the third generation. In this letter the restriction for leptoquarks to decay only within one generation... that only family diagonal decays occur for leptoquarks of the third generation, the charge of the leptoquark... the previous mass limits have been extended ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  The 1st generation LQ received much publicity in 1997 Leptoquarks would be dominantly pair produced via... strong interactions at Tevatron. The signatures for the 1st generation LQ (eq, q') are ee+jets, e... Hunting for supersymmetry in E/ T+jets ...

Source: Qian, Jianming - Fermi National Accelerator Laboratory & Department of Physics, University of Michigan

Collection: Physics

Summary:  Quark and Lepton Hybrids? A search for resonance decays to lepton+jet and limits on leptoquarks... in both classes of particles - leptons and quarks both come in three \generations", for example; also... does imply that some point leptons and quarks can fuse together to give new particles - leptoquarks

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics

Summary:  DØ Note 1974 First Generation Leptoquark Search in pp Collisions at p s = 1.8 TeV S. Abachi (9) , B... and rare pion and kaon decays, leptoquarks must couple only within one generation and the coupling must... be either left or right handed [2]. A first generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  for first generation scalar and vector leptoquarks, and for squarks in R­parity violating SUSY models... generation leptoquarks coupled to electrons could be produced in electron­photon scattering, and they would... generation scalar (S) leptoquarks/squarks and ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  of the leptoquark- muon-quark coupling, #21;. Assuming #21; = 1, lower limits on the mass of a second generation... generations of leptoquarks. Each of these leptoquark generations couples to only one quark and one lepton... generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  V at LEP The OPAL Collaboration Abstract A search for first generation scalar and vector leptoquarks (LQ... of first generation scalar and vector leptoquarks, and of squarks in R­parity violating SUSY models... generation leptoquarks can be produced in electron­ ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  Collaboration Abstract A search for first generation scalar and vector leptoquarks (LQ) as well as for squarks... generation leptoquarks can be produced in electron­ photon scattering. The first generation leptoquarks may... ­proton scattering at high Q 2 [10]. ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  search by D0 at the TEVATRON 16 excludes first generation scalar leptoquarks with masses up to 130 Ge... to 300 GeV. Finally, results are presented from the search for various types of leptoquarks... , with or without lepton flavour violation. All leptoquarks are excluded for masses up to ß 220 GeV in the ...

Source: Imperial College London, Department of Physics, High Energy Physics Group

Collection: Physics

Summary:  the effective quark radius to R ! 1:4\Theta10 \Gamma18 m at 95% confidence level. 3 First Generation Leptoquarks... . Searches at HERA are particularly sensitive to first generation leptoquarks, that couple to an electron... ratio of 1=2. At HERA, any first­generation ...

Source: Imperial College London, Department of Physics, High Energy Physics Group

Collection: Physics

Summary:  Fermilab-Pub-01/057-E Search for First-Generation Scalar and Vector Leptoquarks V.M. Abazov, 23 B... on the mass of a #12;rst-generation scalar leptoquark of 225, 204, and 79 GeV/c 2 for #12; = 1, 1 2 , and 0... production of #12;rst- generation leptoquarks at a mass ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  ;#29;avour violations and constraints were derived on the production of leptoquarks which could mediate... a #22; or a #28; and X is the hadronic #28;nal state. Such processes can be mediated by leptoquarks (LQ... generations. On LFV interactions there are already strong constraints from low energy experiments [8]. 2

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  currents imply that leptoquarks of low mass O (TeV) couple only within a single generation [7... the previous analysis. The CDF Collaboration has conducted a search for second and third generation leptoquarks... ]. For first and second generation scalar leptoquarks ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  Search for Leptoquarks with the ZEUS Detector ZEUS Collaboration October 6, 1993 Abstract A search... has been found for production of leptoquarks with decays to e \Gamma +jet or š +jet. Limits... on the coupling strength of scalar leptoquarks to electron and quark have been determined for masses above 25 Ge

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics

Summary:  . In the case of vector leptoquarks this is 15 #12; LQ Q e.m. # 1 st gen. 2 nd gen. 3 rd gen. S 0 -1/3 [0... a leptoquark to an i th generation lepton and a j th generation quark. In this paper the simplifying assumption... the existence of ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  V, if # = 1. Third generation scalar leptoquarks with charge |Q e.m. | = 2 3 or 4 3 and # = 1 are excluded... for masses lower than 99 GeV by CDF, while D0 excludes third generation scalar leptoquarks with charge |Q e... generations and vector states of the first and second ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  generation of leptons and 214 GeV/c2 for leptoquarks decaying into first generation of leptons. 2... PoS(ICHEP2010)391 Search for Leptoquarks and Technicolor at the Tevatron Gérald Grenier on behalf... Villeurbanne, France E-mail: g.grenier@ipnl.in2p3.fr This note summarizes results on ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  generation [7], and the decays of leptoquark pairs would therefore be expected to yield one of three possible... conducted a search for second and third generation leptoquarks, also assuming the decay LQ ! #23;q, and set... V/c 2 and 222 (250) GeV/c 2 for second (third) generation vector ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  currents imply that leptoquarks of low mass O(TeV) couple only within a single generation [7... analysis. The CDF collaboration has conducted a search for second and third generation leptoquarks, also... leptoquarks, and 171 (199) GeV/c2 and 222 (250) GeV/c2 for second (third) ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  and vector leptoquarks where q 1 is a first--generation quark and q 2 is the final--state quark of any... for e + p collisions. Limits on coupling vs. mass are provided for leptoquarks and R--parity violating... limits on leptoquark masses between 207 GeV and 272 GeV, depending on the ...

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics

Summary:  leptoquarks Large extra dimensions ICHEP, Philadelphia, Aug. 1st, 2008 Amita Raval #12;5 Outline... to LEP & Tevatron #12;19ICHEP, Philadelphia, Aug. 1st, 2008 Amita Raval Heavy leptoquarks For high mass... .08 TeV at 95% CL #12;20ICHEP, Philadelphia, Aug. ...

Source: Raval, Amita - ZEUS / DESY & Department of Physics, Pennsylvania State University

Collection: Physics

Summary:  Third-Generation Leptoquarks in pp Collisions at p s p s p s 5 1.8 TeV B. Abbott,31 M. Abolins,27 B. S... leptoquarks (LQ) produced in pp collisions at p s 1.8 TeV using the D0 detector at Fermilab. Third-generation... , we exclude at the 95% confidence level third-generation scalar ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  of first generation scalar leptoquarks in the eejj channel using the full data set (123 pb \Gamma1... to eq, we set a lower limit on the mass of a first generation scalar leptoquark of 225 GeV/c 2... experimentally [2,3]. Therefore, only leptoquarks which couple within a single ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  exclude first­generation leptoquarks in the mass interval 78 to 117 GeV/c 2 at the 95% confidence level... dependent. Usually it is assumed that leptoquarks couple to only one generation to accommodate experimental... ­, second­, or third­ generation. In p•p collisions, ...

Source: Quigg, Chris - Theoretical Physics, Fermi National Accelerator Laboratory

Collection: Physics

Summary:  .8 TeV. The bound holds for all leptoquark generations. Vector leptoquarks are likewise constrained... generation scalar and vector leptoquarks in p p collisions at Ecm = 1.8 TeV. The quoted limit is for scalar... ) = 2/3. 196 First and second generation ...

Source: Lawrence Berkeley National Laboratory, Computational Research Division, Distributed Systems Department, Data Intensive Distributed Computing Group

Collection: Computer Technologies and Information Sciences

Summary:  of the leptoquark. VALUE (GeV) CL% DOCUMENT ID TECN COMMENT >316>316>316>316 95 161 ABAZOV 09 D0 Second generation... events in pp collisions at Ecm=1.8 TeV. The bound holds for all leptoquark generations. Vector... V, respectively. 181 ABBOTT 98J search for charge -1/3 third ...

Source: Lawrence Berkeley National Laboratory, Computational Research Division, Distributed Systems Department, Data Intensive Distributed Computing Group

Collection: Computer Technologies and Information Sciences

Summary:  Search for Charge 1/3 Third Generation Leptoquarks in p¯p Collisions at p s =1.8 TeV B. Abbott, 31... /3 third generation leptoquarks (LQ) produced in p¯p collisions at p s = 1:8 TeV using the DØ detector... at Fermilab. Third generation leptoquarks are assumed to ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  as the results presented in this Letter, apply for #12;rst- and second-generation scalar leptoquarks... Background Signal Signal eÆciency Preselection 208,055 30; 752 #6; 5350 166 #6; 21 0:302 #6; 0:037 1st... background expectations, and 95% C.L. limits have been set on the leptoquark ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  ) We report on a search for second generation scalar leptoquarks with the D0 detector at the Fermilab... . Second generation leptoquarks are as- sumed to decay with branching ratio b to a muon and quark... generation leptoquarks: two muons plus at least two jets, one ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  Scalar Leptoquark Mass Limits DO/ 1 st Generation (Combined) CDF 1 st Generation (eejj & enjj) DO/ 2 nd... Leptoquark Mass Limits Yang­Mills Coupling DO/ 3 rd Generation (nnbb) CDF 3 rd ...

Source: Bhat, Pushpalatha - Fermi National Accelerator Laboratory

Collection: Physics

Summary:  limits on the first generation leptoquark mass, assuming = 4. LQ Type mLQ (GeV/c2 ) LQ Type mLQ (GeV/c2... mass for V0(L) (2nd generation coupling) and S1(L) (3rd generation coupling) e+ e- q¯q, leptoquarks... leptoquark ex- change. Rb and Ab¯b F B measurements ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  Search for Second Generation Leptoquark Pairs Decaying to µ + jets in pp Collisions at s = 1.8 Te... , Texas 77005 We report on a search for second generation leptoquarks (LQ) produced in pp collisions... at s = 1.8 TeV using the DØ detector at Fermilab. Second generation ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  Second Generation Leptoquark Search in pp Collisions at p s = 1.8 TeV S. Abachi, 12 B. Abbott, 34 M... on a search for second generation scalar leptoquarks with the DØ detector at the Fermilab Tevatron pp collider... at p s = 1.8 TeV. This search is based on 12.7 pb \Gamma1 of data. Second ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  and ZEUS collaborations are presented here, investigating compositeness models, leptoquarks, quarks of #28... and H1 2.2. Leptoquarks Leptoquarks appear in some extensions of the Standard Model. They couple... to lepton-quark pairs. For high leptoquark masses MLQ they show up as a contact interaction with ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  Generation Leptoquark Pairs Decaying to mn 1 jets in pp Collisions at ppp s 5 1.8 TeV B. Abbott,45 M. Abolins... on a search for second generation leptoquarks (LQ) produced in pp collisions at p s 1.8 TeV using the D0... detector at Fermilab. Second generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment; Toback, David - Department of Physics and Astronomy, Texas A&M University

Collection: Physics

Summary:  Search for Second Generation Leptoquark Pairs Decaying to ¯š + jets in pp Collisions at p s = 1... on a search for second generation leptoquarks (LQ) produced in pp collisions at p s = 1:8 TeV using the DØ... detector at Fermilab. Second generation leptoquarks are ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  collisions, leptoquarks of the first generation can be exchanged in the t-- or u--channel leading to hadron... -- are looked for in all channels. For hadron production the exchange of virtual leptoquarks and scalar quarks... level for various models. Upper limits on the coupling strengths of leptoquarks and ...

Source: CERN - European Organization for Nuclear Research, L3 High Energy Physics Experiment

Collection: Physics

Summary:  . In e+e collisions, leptoquarks of the #12;rst generation can be exchanged in the t{ or u... for in all channels. For hadron production the exchange of virtual leptoquarks and scalar quarks is studied... models. Upper limits on the coupling strengths of leptoquarks and scalar quarks are derived. Submitted

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  and quark number. Assuming SU3SU2U1 symmetry, rst-generation leptoquarks are limited to 10 in number... 1997. Presented are limits on leptoquarks, contact interactions, supersymmetry, and excited fermions... with respect to the z-axis. 2 Leptoquarks Leptoquarks are hypothetical particles ...

Source: Belanger, David P. - Physics Department, University of California at Santa Cruz

Collection: Physics

Summary:  1999) We have searched for second-generation leptoquark (LQ) pairs in the mm 1 jets channel using 94 6... to the standard model fermion generations. At the Fermilab Tevatron, leptoquarks are predicted [3] to be produced... on an enhanced search for second- generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment; Toback, David - Department of Physics and Astronomy, Texas A&M University

Collection: Physics

Summary:  generation scalar leptoquarks V.M. Abazov 36 , B. Abbott 75 , M. Abolins 65 , B.S. Acharya 29 , M. Adams 51... report on a search for the pair production of second generation scalar leptoquarks (LQ) in pp collisions... ;. For #12; = 1 (0:5), scalar second generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  Generation Scalar Leptoquarks in p#22;p Collisions at p s = 1:96 TeV V.M. Abazov, 36 B. Abbott, 75 M. Abolins... 31, 2005) We report on a search for the pair production of second generation scalar leptoquarks (LQ2... ; results, the lower limits on the mass of a second generation scalar ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  Generation Scalar Leptoquark Pairs in p¯p Collisions at p s p s p s 5 1.8 TeV B. Abbott,30 M. Abolins,27 B. S... ] as evidence for production of first generation scalar leptoquarks with a mass near 200 GeV c2 , have... subsequently decay into a lepton and a quark. For first generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  physics phenom­ ena such as: contact interactions, exchange of virtual leptoquarks, scalar quarks... exchange of leptoquarks and scalar quarks is investigated using our hadron cross section mea­ surements... interactions, and on leptoquark, scalar quark and scalar neutrino couplings have been presented also by other

Source: CERN - European Organization for Nuclear Research, L3 High Energy Physics Experiment

Collection: Physics

Summary:  tilde. 3 #12;In the process e+ e- hadrons, leptoquarks of the first generation can be exchanged... - ena such as: contact interactions, exchange of virtual leptoquarks, scalar quarks and scalar neutrinos... are used to search for four-fermion contact interactions. The virtual exchange of leptoquarks and ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  then this is equivalent to first generation leptoquark production and decay. D0 have recently updated their analysis [49... in the 1 st HERA Workshop, DESY, Hamburg, Oct., 1987; Separate contributions by B. Schrempp; P. Schleper; B... , 5, 6], leptoquarks [7, 8], and supersymmetry with ...

Source: Imperial College London, Department of Physics, High Energy Physics Group

Collection: Physics

Summary:  Search for First Generation Scalar Leptoquark Pairs in pp Collisions at p s = 1.8 TeV B. Abbott, 30... searched for first generation scalar leptoquark (LQ) pairs in the eš+j\Omega\Gamma27 channel using pp... of leptoquarks that couple to all three fermion generations ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  physics that could generate high-mass e + -jet pairs. The set of leptoquarks with SU(3) #2; SU(2) #2; U(1... in this analysis. As shown in Fig. 1, leptoquark production can generate an s-channel resonance provided mLQ < p s... of events from NC DIS scattering. The leptoquark events ...

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics

Summary:  to do so, for United States Government Purposes. #12;Search for Second Generation Leptoquark Pairs in pp... , Seattle, Washington 98195 We have searched for second generation leptoquark LQ pairs in the +jets channel... generations in the standard model. At the Fermilab Tevatron, ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  Search for Third-Generation Scalar Leptoquarks in p p Collisions at s p 1:96 TeV V. M. Abazov,35... for charge-1=3 third-generation leptoquarks (LQ) produced in p p collisions at s p 1:96 TeV using the D0... detector at Fermilab. Third-generation leptoquarks are ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  to an integrated luminos- ity of 37 pb -1 . First generation leptoquarks (LQs) are searched in very high Q2 neutral... DESY-99-081 ISSN0418-9833 June 1999 A Search for Leptoquark Bosons and Lepton Flavor Violation in e... dataset alone. The NC DIS data is used to constrain the Yukawa couplings of first ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  V. For each mass, 10,000 events were generated. The NLO leptoquark pair production cross sections were... expectation. For a single-generation scalar leptoquark, a lower mass limit of 136GeV has been obtained for #12... ; = 0. While a tighter limit is available for third-generation ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  -20 January, 2007. 5 Searches at HERA Model dependent searches · Leptoquarks · Lepton flavor violation... Rizvi yesterday) #12;Amita Raval, WIN07, SINP, Kolkata 15-20 January, 2007. 6 Leptoquarks Motivation... : LQs appear in many BSM theories eg. Technicolor and composite models · Scalar and vector leptoquarks

Source: Raval, Amita - ZEUS / DESY & Department of Physics, Pennsylvania State University

Collection: Physics

Summary:  ~ 1TeV/c2 #12;11/09/09 R. Ruiz 20 Leptoquarks20,21 and Technicolor21,22 Leptoquarks ­ Fundamental... Generation Particles27 ­ t', b', ', ' might indicate repeating history #12;11/09/09 R. Ruiz 22 The LHC #12... ) ­ Tevatron: 296 ns (2.5MHz) Data Generation ­ LHC Detectors 15 petabytes/year ­ Tevatron ...

Source: Gardel, Margaret - Department of Physics, University of Chicago

Collection: Biology and Medicine ; Physics

Summary:  ) We report on a search for pair production of #12;rst-generation scalar leptoquarks (LQ) in p#22;p... - generation LQ that depend on the unknown leptoquark- l-q Yukawa coupling #21;. At the CERN LEP collider, pair... lower limits on the masses of leptoquarks. In this Letter, we present a ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  Vol. 33 (2002) ACTA PHYSICA POLONICA B No 11 LEPTOQUARKS SEARCHES AT HERA #3; Jolanta Sztuk... -236 Šód¹, Poland (Received July 1, 2002) Results from the leptoquark searches at HERA using the reaction e... for each ex- periment. No signal was seen and limits were set on leptoquark Yukawa couplings for ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  arXiv:0705.0812v1 [hep­ex] 6 May 2007 Fermilab-Pub-07/113-E Search for third-generation leptoquarks... generation leptoquarks are assumed to be produced in pairs and to decay to a tau neutrino and a b quark... mass MLQ . Assuming B = 1, we exclude at the 95% con#12;dence level ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  and leptoquark, techni-particles and on the scale of new physiscs in scenarii with extra compactified dimensions... direct and indirect search. 5 Leptoquarks Leptoquarks would mediate quark-lepton transitions. Within... given for a coupling equal to 4( 0.3). Table 2 presents limits on the mass of ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  ] and are twice as large for vector as for scalar leptoquarks. Only #12;rst-generation leptoquarks are considered... ;ective mass scale in eeqq contact interactions, the ratio of leptoquark mass to the Yukawa coupling... for heavy leptoquark models and the mass scale parameter in models ...

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics

Summary:  of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M/ > 0.3 - 1.4 TeV. A search... of compositeness and the exchange of heavy leptoquarks and supersymmetric quarks, as well as low scale quantum... currents. Any particular model, such as compositeness or the exchange of leptoquarks or ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  leptoquarks, the model with the chiral fourth generation fermions and the model with vector­like quarks. Cross... for the THDM, the scalar leptoquark models, the chiral fourth generation model, and the vector­like quarks... in several new physics models; i.e., the two­Higgs­doublet model, the scalar ...

Source: International Centre for Theoretical Physics (ICTP), Trieste, Italy

Collection: Physics

Summary:  ; i.e., the two-Higgs-doublet model, the scalar leptoquark model, the sequential fourth generation... leptoquarks, that with chiral fourth generation quarks and leptons, and that with vector-like quarks... and scalar leptoquark models, cross sections of e+e- hhZ and hh can be enhanced ...

Source: International Centre for Theoretical Physics (ICTP), Trieste, Italy

Collection: Physics

Summary:  Search for first-generation scalar leptoquarks in p p collisions at s p 1:96 TeV V. M. Abazov,34... on a search for pair production of first-generation scalar leptoquarks (LQ) in p p collisions at s p 1:96 Te... a search for first-generation scalar leptoquark pairs ...

Source: Fermi National Accelerator Laboratory, DØ Experiment

Collection: Physics

Summary:  EUROPEAN LABORATORY FOR PARTICLE PHYSICS CERN­PPE/97­101 29th July 1997 Revised 1st December 1997... , and the use of a Monte Carlo generator with multiple photon emission for simulating the e + e \Gamma ! e + e... , the supersymmetric partner of a quark, in theories where R­parity is violated, or a ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  not differing from it by more than 100 GeV). On this plot, the leptoquark sample is generated with MLQ = 200 Ge... in sections II and III, section IV is devoted to a search for an additional quark generation and sections V... FOR LEPTOQUARKS As predicted by numerous extensions of the standard model, ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  that the leptoquarks couple within one generation only, Pati­Salam model allows cross­generation couplings... 7 at 90% confidence level. A new lower limit on the Pati­Salam leptoquark mass MLQ ? 27 Te... by lepton number conservation. However it can occur in Pati­Salam leptoquark ...

Source: Cornell University, Floyd R. Newman Laboratory of Nuclear Studies (LNS)

Collection: Physics

Summary:  limits on the masses of first generation leptoquarks that depend on the Yukawa coupling of the leptoquark... of electromagnetic strength, first generation leptoquark masses below 275-325 GeV can be excluded depending... generation quarks are involved. #12;Searches ...

Source: Imperial College London, Department of Physics, High Energy Physics Group

Collection: Physics

Summary:  V/c2 peak in the H1 data, searches for first generation leptoquarks were intensified. Particularly... a lower mass limit for first generation scalar leptoquarks of 242 GeV/c2. While these limits on the masses... . At this conference Boehnlein 13 presented new DØ mass limit contours vs. for first ...

Source: Strovink, Mark - Fermi National Accelerator Laboratory & Department of Physics, University of California at Berkeley

Collection: Physics

Summary:  . Searches for Leptoquarks: Search for First Generation Leptoquark is published in PRD Rapid communication... . Second Generation Leptoquark paper is published in Physics Letters B. Paper on search for singly produced... Leptoquark is published in PLB. Another paper on ...

Source: Parua, Nirmalya - Fermi National Accelerator Laboratory

Collection: Physics

Summary:  yield an ac­ ceptance of 14% (4%) to a first generation leptoquark with a mass of 150 GeV/c 2... of 187 GeV/c 2 for a first or sec­ ond generation q# scalar leptoquark (correponding to an upper cross... non­SM production processes. For the specific case of first and second generation ...

Source: Quigg, Chris - Theoretical Physics, Fermi National Accelerator Laboratory

Collection: Physics

Summary:  · Subdetectors integration + 1st integration at CERN without magnet: 12 months in 2007/2008 · 1st de... /ton/year Next generation requires further x100 improvement! #12;8 Metodi sperimentali per la ricerca diretta #12... leptoquark, bosoni pesanti X e Y. · Poiché ...

Source: Roma "La Sapienza", Università di - Dipartimento di Fisica, Alpha Magnetic Spectrometer (AMS-02) Group

Collection: Physics

Summary:  result is a single most sensitive search for the =1 1st generation LQ. It rules out an interpretation... of the HERA high Q2 event excess with 1st generation LQ within general LQ models w/o extra fermions... performed an analogous analysis based on the M/M variable ...

Source: Landsberg, Greg - Department of Physics, Brown University

Collection: Physics

Summary:  -channel exchange of a leptoquark coupling to di#27;erent lepton and quark generations. No events consistent... , leptoquarks and other new phenomena beyond the Standard Model, are reviewed. Finally, the prospects... applied in many analyses looking for physics beyond the SM (Supersymmetry, Technicolor, ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  for the mass of a possible scalar leptoquark, mLQ > 560 GeV=c2 (90% C.L.), is obtained. DOI: 10.1103/Phys... . In renormalizable gauge theo- ries the only mechanism that could generate such a coupling at the tree level... is the exchange of a spin-0 leptoquark [7]. We present here the final result of a measurement of the ...

Source: Zejma, Jacek - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  Search for Pair Production of Second-Generation Scalar Leptoquarks in pp Collisions at ffiffiffi... 2011) A search for pair production of second-generation scalar leptoquarks in the final state with two... . An upper limit is set on the second-generation leptoquark ...

Source: Jensen, Grant J. - Division of Biology, California Institute of Technology

Collection: Biology and Medicine

Summary:  out. The new generation of experiments will be a lot more demanding than the previous in data handling... 's best limits 5 on the existence of leptoquarks that might decay into electrons and quarks. The lower... limit on the leptoquark mass from the DØ experiment was 225 GeV, ruling out the possibility

Source: Bhat, Pushpalatha - Fermi National Accelerator Laboratory

Collection: Physics

Summary:  and second generation scalar leptoquark cross section, respectively. Using the lower bound for the the... generation scalar leptoquark cross section and lower limit on the LQ mass; the black dots... DØ Run II Preliminary -1 L dt = 44.5 pb LEPexcluded(95%CL) Standard Model Topcolor ...

Source: Gerber, Cecilia E. - Department of Physics, University of Illinois at Chicago

Collection: Physics

Summary:  Search for Third Generation Vector Leptoquarks in pp Collisions at # s = 1.96 TeV T. Aaltonen, 23 A... , are predicted for vector (spin 1) than for scalar leptoquarks [6]. We search for third generation vector... University, New Haven, Connecticut 06520 (Dated: June 15, 2007) We describe a search for a third ...

Source: Quigg, Chris - Theoretical Physics, Fermi National Accelerator Laboratory

Collection: Physics

Summary:  there. Evidence is not found for first-generation leptoquarks with mass below 220 GeV, scalar or vector... of the original H1 excess might have been provided by the existence of first-generation leptoquarks of mass 200... generation scalar leptoquarks. The shaded ...

Source: Strovink, Mark - Fermi National Accelerator Laboratory & Department of Physics, University of California at Berkeley

Collection: Physics

Summary:  , but the 2 probability for CDF's function is of order 10-5. #12;6 Limits on first-generation leptoquarks... If first-generation leptoquarks were to exist, the new interaction that would bind e to q would enhance eq... V CDF (1997), MLQ > 213 GeV CDF and DØ, MLQ > 242 GeV #12;7 Limits on ...

Source: Strovink, Mark - Fermi National Accelerator Laboratory & Department of Physics, University of California at Berkeley

Collection: Physics

Summary:  by T is significantly different from those predictions generated by competing theories, in a sense discovering regions... of discrete Monte Carlo events generated by a detector simulator designed to imitate the behavior of a real... dataset is generated under the assumption that the Standard Model TS is true. Events follow the ...

Source: Vilalta, Ricardo - Department of Computer Science, University of Houston

Collection: Computer Technologies and Information Sciences

Summary:  &C seminar 30 1st generation LQ 111GeV/c2 (b =0.01) 124GeV/c2 (b =0.05) 135 GeV/c2 (b =0.1) 161 GeV/c2 (b =0... II Leptoquarks Carry both lepton (L) and baryon (B) numbers Couple to quark and lepton of the same generation... ... + Jets and heavy flavors n ...

Source: Quigg, Chris - Theoretical Physics, Fermi National Accelerator Laboratory

Collection: Physics

Summary:  ­produced leptoquarks are as follows: for second (third) generation scalar 12 leptoquarks, M ? 123(148) GeV; for second... (third) generation minimally coupled vector 13 leptoquarks, M ? 171(199) GeV; for second (third... ) generation Yang­Mills vector 12 ...

Source: Seidel, Sally - Department of Physics and Astronomy, University of New Mexico

Collection: Physics

Summary:  ( = 40 pb-1) · 1st generation search in the eejj final state ( = 43 pb-1) Scalar Leptoquark Mass [Ge... Symposium 5/2/2003 C. Gerber (UIC) 20 Scalar Leptoquark Searches · 2nd generation search in the µµjj channel... ) Standard Model Topcolor ...

Source: Gerber, Cecilia E. - Department of Physics, University of Illinois at Chicago

Collection: Physics

Summary:  on leptoquarks ZEUS Collaboration Abstract A search for narrow-width resonances that decay into electron... of leptoquarks de- scribed by the Buchmuller-Ruckl-Wyler model were also derived for masses up to 400 Ge... V. For #21; = 0.1, leptoquark masses up to 290 GeV are excluded. #12; The ZEUS Collaboration S. Chekanov, M

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics

Summary:  CDF/PUB/CDF/CDFR/7927 Search for Second-Generation Scalar Leptoquarks in p¯p Collisions at s=1... on a search for pair production of second generation scalar leptoquark in p¯p collisions at s=1.96 Te... 180 200 220 240 Search For Second Generation Scalar ...

Source: Quigg, Chris - Theoretical Physics, Fermi National Accelerator Laboratory

Collection: Physics

Summary:  CDF/PUB/CDF/CDFR/7927 Search for Second-Generation Scalar Leptoquarks in p¯p Collisions at s=1... on a search for pair production of second generation scalar leptoquark in p¯p collisions at s=1.96 Te... 180 200 220 240 Search For Second Generation Scalar ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  CDF/PUB/CDF/CDFR/7927 Search for Second-Generation Scalar Leptoquarks in p¯p Collisions at s=1... on a search for pair production of second generation scalar leptoquark in p¯p collisions at s=1.96 Te... 180 200 220 240 Search For Second Generation Scalar ...

Source: CERN - European Organization for Nuclear Research, L3 High Energy Physics Experiment

Collection: Physics

Summary:  CDF/PUB/CDF/CDFR/7927 Search for Second-Generation Scalar Leptoquarks in p¯p Collisions at s=1... on a search for pair production of second generation scalar leptoquark in p¯p collisions at s=1.96 Te... 180 200 220 240 Search For Second Generation Scalar ...

Source: OPAL Experiment at Large Electron Positron Collider (LEP), CERN

Collection: Plasma Physics and Fusion

Summary:  CDF/PUB/CDF/CDFR/7927 Search for Second-Generation Scalar Leptoquarks in p¯p Collisions at s=1... on a search for pair production of second generation scalar leptoquark in p¯p collisions at s=1.96 Te... 180 200 220 240 Search For Second Generation Scalar ...

Source: CERN - European Organization for Nuclear Research, L3 High Energy Physics Experiment

Collection: Physics

Summary:  ;rst-generation quark, while #12; `q is the branching ratio of the leptoquark into a lepton... -Parity-violating squarks of generation j and k, respec- tively [35]. 9 #12; 6.3 High-mass leptoquark and squark limits... for leptoquarks which couple exclusively to the third ...

Source: DESY, Deutsches Elektronen-Synchrotron in Hamburg

Collection: Physics