Bounding the Higgs width at the LHC using full analytic results for $gg → e^- e^+ \mu^- \mu^+$

Campbell, John M.; Ellis, R. Keith; Williams, Ciaran

doi:10.1007/JHEP04(2014)060

Title: Bounding the Higgs width at the LHC using full analytic results for $$gg → e^- e^+ \mu^- \mu^+$$

Abstract

We revisit the hadronic production of the four-lepton final state, e^– e⁺ μ^– μ⁺, through the fusion of initial state gluons. This process is mediated by loops of quarks and we provide first full analytic results for helicity amplitudes that account for both the effects of the quark mass in the loop and off-shell vector bosons. The analytic results have been implemented in the Monte Carlo program MCFM and are both fast, and numerically stable in the region of low Z transverse momentum. We use our results to study the interference between Higgs-mediated and continuum production of four-lepton final states, which is necessary in order to obtain accurate theoretical predictions outside the Higgs resonance region. We have confirmed and extended a recent analysis of Caola and Melnikov that proposes to use a measurement of the off-shell region to constrain the total width of the Higgs boson. Using a simple cut-and-count method, existing LHC data should bound the width at the level of 25-45 times the Standard Model expectation. We investigate the power of using a matrix element method to construct a kinematic discriminant to sharpen the constraint. Furthermore, in our analysis the bound on the Higgs width is improved bymore »« less

Authors:

Campbell, John M. ^[1]; Ellis, R. Keith ^[1]; Williams, Ciaran ^[2]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
The Niels Bohr Institute, Copenhagen (Denmark)

Publication Date:: Wed Apr 09 00:00:00 EDT 2014

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1156488

Report Number(s):: FERMILAB-PUB-13-508-T
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1311.3589

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2014; Journal Issue: 4; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; QCD phenomenology; hadronic colliders

Citation Formats


                    Campbell, John M., Ellis, R. Keith, and Williams, Ciaran. Bounding the Higgs width at the LHC using full analytic results for $gg → e^- e^+ \mu^- \mu^+$.  United States: N. p., 2014. 
Web.  doi:10.1007/JHEP04(2014)060.

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                    Campbell, John M., Ellis, R. Keith, & Williams, Ciaran. Bounding the Higgs width at the LHC using full analytic results for $gg → e^- e^+ \mu^- \mu^+$.  United States.  https://doi.org/10.1007/JHEP04(2014)060

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                    Campbell, John M., Ellis, R. Keith, and Williams, Ciaran. Wed .  
"Bounding the Higgs width at the LHC using full analytic results for $gg → e^- e^+ \mu^- \mu^+$".  United States.  https://doi.org/10.1007/JHEP04(2014)060.  https://www.osti.gov/servlets/purl/1156488.

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@article{osti_1156488,

  title        = {Bounding the Higgs width at the LHC using full analytic results for $gg → e^- e^+ \mu^- \mu^+$},

  author       = {Campbell, John M. and Ellis, R. Keith and Williams, Ciaran},

  abstractNote = {We revisit the hadronic production of the four-lepton final state, e– e+ μ– μ+, through the fusion of initial state gluons. This process is mediated by loops of quarks and we provide first full analytic results for helicity amplitudes that account for both the effects of the quark mass in the loop and off-shell vector bosons. The analytic results have been implemented in the Monte Carlo program MCFM and are both fast, and numerically stable in the region of low Z transverse momentum. We use our results to study the interference between Higgs-mediated and continuum production of four-lepton final states, which is necessary in order to obtain accurate theoretical predictions outside the Higgs resonance region. We have confirmed and extended a recent analysis of Caola and Melnikov that proposes to use a measurement of the off-shell region to constrain the total width of the Higgs boson. Using a simple cut-and-count method, existing LHC data should bound the width at the level of 25-45 times the Standard Model expectation. We investigate the power of using a matrix element method to construct a kinematic discriminant to sharpen the constraint. Furthermore, in our analysis the bound on the Higgs width is improved by a factor of about 1.6 using a simple cut on the MEM discriminant, compared to an invariant mass cut μ4l > 300 GeV.},

  doi          = {10.1007/JHEP04(2014)060},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 4,

  volume       = 2014,

  place        = {United States},

  year         = {Wed Apr 09 00:00:00 EDT 2014},

  month        = {Wed Apr 09 00:00:00 EDT 2014}

}

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Higgs constraints from vector boson fusion and scattering

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We present results on 4-lepton + 2-jet production, the partonic processes most commonly described as vector boson pair production in the Vector Boson Fusion (VBF) mode. That final state contains diagrams that are mediated by Higgs boson exchange. We focus particularly on the high-mass behaviour of the Higgs boson mediated diagrams, which unlike on-shell production, gives information about the Higgs couplings without assumptions on the Higgs boson total width. We assess the sensitivity of the high-mass region to Higgs coupling strengths, considering all vector boson pair channels, W ^-W ⁺, W ^± W ^±, W ^± Z and ZZ.more »« less
Cited by 19
https://doi.org/10.1007/JHEP04(2015)030

Full Text Available
Two loop correction to interference in $$gg \to ZZ$$

Journal Article Campbell, John M. ; Ellis, R. Keith ; Czakon, Michal ; ... - Journal of High Energy Physics (Online)

We present results for the production of a pair of on-shell Z bosons via gluon-gluon fusion. This process occurs both through the production and decay of the Higgs boson, and through continuum production where the Z boson couples to a loop of massless quarks or to a massive quark. We calculate the interference of the two processes and its contribution to the cross section up to and including order O(αmore »« less
Cited by 26
https://doi.org/10.1007/JHEP08(2016)011

Full Text Available
Neutral Z boson pair production due to radion resonance in the Randall-Sundrum model: Prospects at the CERN LHC

Journal Article Das, Prasanta Kumar - Physical Review. D, Particles Fields

The neutral Z boson pair production due to radion resonance at the Large Hadron Collider (LHC) is an interesting process to explore the notion of warped geometry (Randall-Sundrum model). Because of the enhanced coupling of radion with a pair of gluons due to trace anomaly and top(quark) loop, the radion can provide a larger event rate possibility as compared to any new physics effect. Using the proper radion-top-antitop (with the quarks being off-shell) coupling, we obtain the correct radion production rate at LHC and explore several features of a heavier radion decaying into a pair of real Z bosons whichmore »« less
https://doi.org/10.1103/PhysRevD.72.055009
Evidence of off-shell Higgs boson production from ZZ leptonic decay channels and constraints on its total width with the ATLAS detector

Journal Article Aad, G. ; Abbott, B. ; Abeling, K. ; ... - Physics Letters. B

This Letter reports on a search for off-shell production of the Higgs boson using 139 fb^—1 ofmore »« less
https://doi.org/10.1016/j.physletb.2023.138223

Full Text Available
Measurement of the top quark pair production cross section in proton-antiproton collisions at a center of mass energy of 1.96 TeV, hadronic top decays with the D0 detector

Thesis/Dissertation Hegeman, Jeroen Guido

Of the six quarks in the standard model the top quark is by far the heaviest: 35 times more massive than its partner the bottom quark and more than 130 times heavier than the average of the other five quarks. Its correspondingly small decay width means it tends to decay before forming a bound state. Of all quarks, therefore, the top is the least affected by quark confinement, behaving almost as a free quark. Its large mass also makes the top quark a key player in the realm of the postulated Higgs boson, whose coupling strengths to particles are proportional to their masses. Precision measurements of particle masses for e.g. the top quark and the W boson can hereby provide indirect constraints on the Higgs boson mass. Since in the standard model top quarks couple almost exclusively to bottom quarks (t → Wb), top quark decays provide a window on the standard model through the direct measurement of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element V_tb. In the same way any lack of top quark decays into W bosons could imply the existence of decay channels beyond the standard model, for example charged Higgs bosons as expected in two-doublet Higgs models: t → H⁺b. Within the standard model top quark decays can be classified by the (lepton or quark) W boson decay products. Depending on the decay of each of the W bosons, tmore »« less
https://doi.org/10.2172/951334

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Title: Bounding the Higgs width at the LHC using full analytic results for $$gg → e^- e^+ \mu^- \mu^+$$

Abstract

Citation Formats

Vector boson pair production at the LHC journal, July 2011

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis journal, July 2002

Z-boson pair production via gluon fusion journal, July 1989

One-loop amplitudes for e+e− to four partons journal, March 1998

QCD radiative corrections to Z boson pair production in hadronic collisions journal, July 1991

W+W−, WZ and ZZ production in the POWHEG BOX journal, November 2011

PYTHIA 6.4 physics and manual journal, May 2006

Direct extraction of one loop rational terms journal, January 2009

Parton distributions for the LHC journal, July 2009

HPro: A NLO Monte-Carlo for Higgs production via gluon fusion with finite heavy quark masses journal, October 2009

Higgs production and decay: analytic results at next-to-leading order QCD journal, December 2005

Higgs Bosons from Two-Gluon Annihilation in Proton-Proton Collisions journal, March 1978

Two-loop amplitudes and master integrals for the production of a Higgs boson via a massive quark and a scalar-quark loop journal, January 2007

Scalar one-loop integrals for QCD journal, February 2008

The matrix element method at next-to-leading order journal, November 2012

Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs journal, February 2013

Coupling spans of the Higgs-like boson journal, February 2013

Interference effects for H → WW/ZZ → $ \ell {{\overline{\nu}}_{\ell }}\overline{\ell}{\nu_{\ell }} $ searches in gluon fusion at the LHC journal, December 2013

Generalized unitarity and one-loop amplitudes in super-Yang–Mills journal, October 2005

FF — a package to evaluate one-loop Feynman diagrams journal, July 1991

One-loop corrections for e+e− annihilation into μ+μ− in the Weinberg model journal, November 1979

Helicity amplitudes for O(αs) production of W+W−, W±Z, ZZ, W±γ, or Zγ pairs at hadron colliders journal, October 1998

NLO QCD corrections to W±Zγ production with leptonic decays journal, February 2011

Parton distributions for the LHC text, January 2007

Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs text, January 2013

ZZ plus jet production via gluon fusion at the LHC text, January 2013

Study of the Mass and Spin-Parity of the Higgs Boson Candidate Via Its Decays to Z Boson Pairs text, January 2013

Scalar one-loop integrals for QCD text, January 2007

Parton distributions for the LHC text, January 2009

HPro: A NLO Monte-Carlo for Higgs production via gluon fusion with finite heavy quark masses text, January 2009

Vector boson pair production at the LHC text, January 2011

W+W-, WZ and ZZ production in the POWHEG BOX text, January 2011

Inadequacy of zero-width approximation for a light Higgs boson signal text, January 2012

Coupling spans of the Higgs-like boson text, January 2012

Bounding the Higgs Boson Width Through Interferometry text, January 2013

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis text, January 2002

Two-loop amplitudes and master integrals for the production of a Higgs boson via a massive quark and a scalar-quark loop text, January 2006

One-Loop Amplitudes for e^+ e^- to Four Partons text, January 1997

Quantum Critical Higgs: from AdS5 to colliders journal, February 2020

Probing the top-quark width through ratios of resonance contributions of e + e − → W + W − b b ¯ $$ {\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\mathrm{W}}^{+}{\mathrm{W}}^{-}\mathrm{b}\overline{\mathrm{b}} $$ journal, March 2016

NNLO predictions for Z-boson pair production at the LHC journal, March 2018

ZZ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel journal, March 2019

QCD corrections to vector boson pair production in gluon fusion including interference effects with off-shell Higgs at the LHC journal, July 2016

The Higgs legacy of the LHC Run I journal, August 2015

Two loop correction to interference in gg → ZZ journal, August 2016

Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC journal, November 2014

Higgs ultraviolet softening journal, December 2014

Top quark mass effects in g g → Z Z at two loops and off-shell Higgs boson interference journal, December 2019

On-shell interference effects in Higgs boson final states journal, April 2015

Constraints on the spin-parity and anomalous H V V couplings of the Higgs boson in proton collisions at 7 and 8 TeV journal, July 2015

Signal-background interference for a singlet spin-0 digluon resonance at the LHC journal, August 2016

Heavy Higgs signal–background interference in $$gg\rightarrow VV$$ g g → V V in the Standard Model plus real singlet journal, August 2015

Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at $$\sqrt{s}=7$$ s = 7 and 8 TeV in the ATLAS experiment journal, January 2016

Anomalous triple-gauge-boson interactions in vector-boson pair production with Recola2 journal, June 2018

Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC text, January 2014

A global view on the Higgs self-coupling text, January 2017

Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at $\sqrt{s}=13 $ TeV text, January 2018

Limits on the Higgs boson lifetime and width from its decay to four charged leptons text, January 2015

Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in gluon fusion text, January 2015

The two-loop helicity amplitudes for gg → V 1 V 2 → 4 leptons text, January 2015

The Higgs legacy of the LHC Run I text, January 2015

Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width text, January 2016

Two loop correction to interference in gg → ZZ text, January 2016

Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width text, January 2016

ZZ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel text, January 2018

Constraints on the spin-parity and anomalous H V V couplings of the Higgs boson in proton collisions at 7 and 8 TeV text, January 2015

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state text, January 2019

Resolving gluon fusion loops at current and future hadron colliders text, January 2016

Top quark mass effects in g g → Z Z at two loops and off-shell Higgs boson interference text, January 2019

Limits on the Higgs boson lifetime and width from its decay to four charged leptons text, January 2015

Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width text, January 2016

Limits on the Higgs boson lifetime and width from its decay to four charged leptons text, January 2015

Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV text, January 2015

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state text, January 2019

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state text, January 2019

Two-loop planar master integrals for the production of off-shell vector bosons in hadron collisions text, January 2014

All the generalized Georgi-Machacek models text, January 2015

Vector boson pair production at the LHC
journal, July 2011

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
journal, July 2002

Z-boson pair production via gluon fusion
journal, July 1989

One-loop amplitudes for e+e− to four partons
journal, March 1998

QCD radiative corrections to Z boson pair production in hadronic collisions
journal, July 1991

W+W−, WZ and ZZ production in the POWHEG BOX
journal, November 2011

PYTHIA 6.4 physics and manual
journal, May 2006

Direct extraction of one loop rational terms
journal, January 2009

Parton distributions for the LHC
journal, July 2009

HPro: A NLO Monte-Carlo for Higgs production via gluon fusion with finite heavy quark masses
journal, October 2009

Higgs production and decay: analytic results at next-to-leading order QCD
journal, December 2005

Higgs Bosons from Two-Gluon Annihilation in Proton-Proton Collisions
journal, March 1978

Two-loop amplitudes and master integrals for the production of a Higgs boson via a massive quark and a scalar-quark loop
journal, January 2007

Scalar one-loop integrals for QCD
journal, February 2008

The matrix element method at next-to-leading order
journal, November 2012

Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to $Z$ Boson Pairs
journal, February 2013

Coupling spans of the Higgs-like boson
journal, February 2013

Interference effects for H → WW/ZZ → $ \ell {{\overline{\nu}}_{\ell }}\overline{\ell}{\nu_{\ell }} $ searches in gluon fusion at the LHC
journal, December 2013

Generalized unitarity and one-loop amplitudes in super-Yang–Mills
journal, October 2005

FF — a package to evaluate one-loop Feynman diagrams
journal, July 1991

One-loop corrections for e+e− annihilation into μ+μ− in the Weinberg model
journal, November 1979

Helicity amplitudes for O(αs) production of W+W−, W±Z, ZZ, W±γ, or Zγ pairs at hadron colliders
journal, October 1998

NLO QCD corrections to W±Zγ production with leptonic decays
journal, February 2011

Parton distributions for the LHC
text, January 2007

Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs
text, January 2013

ZZ plus jet production via gluon fusion at the LHC
text, January 2013

Study of the Mass and Spin-Parity of the Higgs Boson Candidate Via Its Decays to Z Boson Pairs
text, January 2013

Scalar one-loop integrals for QCD
text, January 2007

Parton distributions for the LHC
text, January 2009

HPro: A NLO Monte-Carlo for Higgs production via gluon fusion with finite heavy quark masses
text, January 2009

Vector boson pair production at the LHC
text, January 2011

W+W-, WZ and ZZ production in the POWHEG BOX
text, January 2011

Inadequacy of zero-width approximation for a light Higgs boson signal
text, January 2012

Coupling spans of the Higgs-like boson
text, January 2012

Bounding the Higgs Boson Width Through Interferometry
text, January 2013

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
text, January 2002

Two-loop amplitudes and master integrals for the production of a Higgs boson via a massive quark and a scalar-quark loop
text, January 2006

One-Loop Amplitudes for e^+ e^- to Four Partons
text, January 1997

Quantum Critical Higgs: from AdS5 to colliders
journal, February 2020

Probing the top-quark width through ratios of resonance contributions of e + e − → W + W − b b ¯ $$ {\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\mathrm{W}}^{+}{\mathrm{W}}^{-}\mathrm{b}\overline{\mathrm{b}} $$
journal, March 2016

NNLO predictions for Z-boson pair production at the LHC
journal, March 2018

ZZ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel
journal, March 2019

QCD corrections to vector boson pair production in gluon fusion including interference effects with off-shell Higgs at the LHC
journal, July 2016

The Higgs legacy of the LHC Run I
journal, August 2015

Two loop correction to interference in gg → ZZ
journal, August 2016

Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
journal, November 2014

Higgs ultraviolet softening
journal, December 2014

Top quark mass effects in $g g \to Z Z$ at two loops and off-shell Higgs boson interference
journal, December 2019

On-shell interference effects in Higgs boson final states
journal, April 2015

Constraints on the spin-parity and anomalous $H V V$ couplings of the Higgs boson in proton collisions at 7 and 8 TeV
journal, July 2015

Signal-background interference for a singlet spin-0 digluon resonance at the LHC
journal, August 2016

Heavy Higgs signal–background interference in $$gg\rightarrow VV$$ g g → V V in the Standard Model plus real singlet
journal, August 2015

Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at $$\sqrt{s}=7$$ s = 7 and 8 TeV in the ATLAS experiment
journal, January 2016

Anomalous triple-gauge-boson interactions in vector-boson pair production with Recola2
journal, June 2018

Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
text, January 2014

A global view on the Higgs self-coupling
text, January 2017

Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at $\sqrt{s}=13 $ TeV
text, January 2018

Limits on the Higgs boson lifetime and width from its decay to four charged leptons
text, January 2015

Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in gluon fusion
text, January 2015

The two-loop helicity amplitudes for gg → V 1 V 2 → 4 leptons
text, January 2015

The Higgs legacy of the LHC Run I
text, January 2015

Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width
text, January 2016

Two loop correction to interference in gg → ZZ
text, January 2016

Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width
text, January 2016

ZZ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel
text, January 2018

Constraints on the spin-parity and anomalous H V V couplings of the Higgs boson in proton collisions at 7 and 8 TeV
text, January 2015

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
text, January 2019

Resolving gluon fusion loops at current and future hadron colliders
text, January 2016

Top quark mass effects in g g → Z Z at two loops and off-shell Higgs boson interference
text, January 2019

Limits on the Higgs boson lifetime and width from its decay to four charged leptons
text, January 2015

Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width
text, January 2016

Limits on the Higgs boson lifetime and width from its decay to four charged leptons
text, January 2015

Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV
text, January 2015

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
text, January 2019

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
text, January 2019

Two-loop planar master integrals for the production of off-shell vector bosons in hadron collisions
text, January 2014

All the generalized Georgi-Machacek models
text, January 2015

QCD corrections to vector boson pair production in gluon fusion including interference effects with off-shell Higgs at the LHC
text, January 2016

Signal-background interference for a singlet spin-0 digluon resonance at the LHC
text, January 2016

Resolving gluon fusion loops at current and future hadron colliders
text, January 2016