Bounding the Higgs width at the LHC using full analytic results for gg -> 2e 2μ

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. 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 m_{4l} > 300 GeV.

40 pages, 12 Figures, 7 Tables

References in corpus (11)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Vector boson pair production at the LHC
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Direct extraction of one-loop integral coefficients
• Direct Extraction Of One Loop Rational Terms
• HPro: A NLO Monte-Carlo for Higgs production via gluon fusion with finite heavy quark masses
• Coupling spans of the Higgs-like boson
• Interference effects for H --> WW/ZZ --> l anti-nu_l anti-l nu_l searches in gluon fusion at the LHC

Cited by in corpus (117)

• The Standard Model as an Effective Field Theory
• Combined measurements of Higgs boson production and decay using up to $80$ fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment
• Measurements of the Higgs boson production and decay rates and coupling strengths using $pp$ collision data at $\sqrt{s}=7$ and $8$ TeV in the ATLAS experiment
• Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV
• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
• Search for an additional, heavy Higgs boson in the $H\to ZZ$ decay channel at $\sqrt{s}$ = 8 TeV in $pp$ collision data with the ATLAS detector
• Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
• QCD corrections to ZZ production in gluon fusion at the LHC
• Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
• Mass Effects in the Higgs-Gluon Coupling: Boosted vs Off-Shell Production
• The two-loop helicity amplitudes for $q{\bar{q}}^{\prime }\to V_1{V}_2\to 4\mathrm{leptons}$
• Constraints on the off-shell Higgs boson signal strength in the high-mass $ZZ$ and $WW$ final states with the ATLAS detector
• A global view on the Higgs self-coupling
• Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess
• NLO Higgs Effective Field Theory and kappa-framework
• Limits on the Higgs boson lifetime and width from its decay to four charged leptons
• Limitations and Opportunities of Off-Shell Coupling Measurements
• Constraints on anomalous Higgs boson couplings using production and decay information in the four-lepton final state
• Taming the off-shell Higgs boson
• Production of two Z-bosons in gluon fusion in the heavy top quark approximation
• Constraints on off-shell Higgs boson production and the Higgs boson total width in $ZZ\to 4\ell$ and $ZZ\to 2\ell 2\nu$ final states with the ATLAS detector
• QCD corrections to vector boson pair production in gluon fusion including interference effects with off-shell Higgs at the LHC
• $ZZ$ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel
• Beyond Geolocating: Constraining Higher Dimensional Operators in $H\to 4\ell$ with Off-Shell Production and More
• The Higgs width in the SMEFT
• Constraints on anomalous Higgs boson couplings to vector bosons and fermions in its production and decay using the four-lepton final state
• Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
• All the generalized Georgi-Machacek models
• New features in the JHU generator framework: constraining Higgs boson properties from on-shell and off-shell production
• 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
• Two loop correction to interference in $gg\to ZZ$
• Higgs ultraviolet softening
• Higgs couplings: disentangling New Physics with off-shell measurements
• $ZZ$ production at the LHC: NNLO predictions for $2\ell 2\nu$ and $4\ell$ signatures
• NNLO predictions for Z-boson pair production at the LHC
• Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in quark-antiquark collisions
• Anomalous triple-gauge-boson interactions in vector-boson pair production with RECOLA2
• Two-loop helicity amplitudes for $gg\to ZZ$ with full top-quark mass effects
• QCD radiative corrections for $h\to b\bar{b}$ in the Standard Model Dimension-6 EFT
• Higgs-Strahlung: Merging the NLO Drell-Yan and Loop-Induced 0+1 jet Multiplicities
• Jet Vetoes Interfering with H->WW
• Soft gluon resummation in the signal-background interference process of $gg(\to h^{\ast })\to ZZ$
• Study of the hard double-parton scattering contribution to inclusive four-lepton production in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Two-loop Master Integrals with the Simplified Differential Equations approach
• Off-shell Higgs Probe to Naturalness
• Phenomenology of Enhanced Light Quark Yukawa Couplings and the $W^{\pm }h$ Charge Asymmetry
• Potential Precision on Higgs Couplings and Total Width at the ILC
• Resolving gluon fusion loops at current and future hadron colliders
• Exploring Theory Space with Monte Carlo Reweighting
• $ZZ$ production at nNNLO+PS with MiNNLO${}_{\text{PS}}$
• Higgs Couplings at High Scales
• Heavy Higgs signal-background interference in gg --> VV in the Standard Model plus real singlet
• Measurements of four-lepton production in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• Interference effects for Higgs-mediated Z-pair plus jet production
• Higgs characterisation in the presence of theoretical uncertainties and invisible decays
• On the ratio of ttbb and ttjj cross sections at the CERN Large Hadron Collider
• Interference in the $gg\to h\to \gamma \gamma$ On-Shell Rate and the Higgs Boson Total Width
• $W^{+}{W}^{-}$ production at NNLO+PS with MiNNLO${}_{\mathrm{PS}}$
• Higgs constraints from vector boson fusion and scattering
• Probing $Zt\bar{t}$ couplings using $Z$ boson polarization in $ZZ$ production at hadron colliders
• Search for Higgs boson pairs decaying to WW*WW*, WW*$\tau \tau$, and $\tau \tau \tau \tau$ in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Hiding a Higgs width enhancement from off-shell gg (--> h*) --> ZZ measurements
• The Higgs boson Turns Ten
• On-shell interference effects in Higgs final states
• Four-lepton production in gluon fusion at NLO matched to parton showers
• Top quark mass effects in $gg\to ZZ$ at two loops and off-shell Higgs interference
• Weak Boson Fusion at 100 TeV
• Interference effects in the $H(\to \gamma \gamma )+2$ jets channel at the LHC
• Probing the top-quark width through ratios of resonance contributions of $e^{+}{e}^{-}\to W^{+}{W}^{-}b\bar{b}$
• Improving Higgs coupling measurements through ZZ Fusion at the ILC
• Two-loop planar master integrals for the production of off-shell vector bosons in hadron collisions
• Off-shell Higgs Couplings in $H^{\ast }\to ZZ\to \ell \ell \nu \nu$
• Off-shell effects in Higgs processes at a linear collider and implications for the LHC
• Anatomizing Exotic Production of the Higgs Boson
• Constraining anomalous Higgs boson couplings to virtual photons
• Characterising the Higgs boson with ATLAS data from Run 2 of the LHC
• Off-shell Higgs production at the LHC as a probe of the trilinear Higgs coupling
• Measurement of off-shell Higgs boson production in the $H^{\ast }\to ZZ\to 4\ell$ decay channel using a neural simulation-based inference technique in 13 TeV $pp$ collisions with the ATLAS detector
• Extracting the Top-Quark Width from Non-Resonant Production
• Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurements of inclusive and differential cross sections for the Higgs boson production and decay to four-leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• A new evaluation of the $HZZ$ coupling: direct bounds on anomalous contributions and $CP$ violating effects via a new asymmetry
• Top-quark loop corrections in Z+jet and Z+2 jet production
• Measurement of the inclusive and differential $\mathrm{t}\bar{\mathrm{t}}\gamma$ cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Signal-background interference for a singlet spin-0 digluon resonance at the LHC
• ZZ production at high transverse momenta beyond NLO QCD
• Probing Higgs portals with matrix-element based kinematic discriminants in $ZZ\to 4\ell$ production
• Probing CP Violation in $h\to Z\gamma$ with Background Interference
• Interference contributions to gluon initiated heavy Higgs production in the Two-Higgs-Doublet Model
• Bounding the Higgs width at the LHC
• Probing the top-quark width using the charge identification of $b$ jets
• Signal-background interference effects in Higgs-mediated diphoton production beyond NLO
• Probe CP violation in $H\to \gamma Z$ through forward-backward asymmetry
• Search for nonresonant Higgs boson pair production in the four leptons plus two b jets final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Determining Higgs boson width at electron-positron colliders
• Interference Effects in Higgs production through Vector Boson Fusion in the Standard Model and its Singlet Extension
• Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• Higher-Order Corrections to Quantum Observables in $h\to W{W}^{\ast }$
• Coupling Extraction From Off-Shell Cross-sections
• Signal-background interference for digluon resonances at the Large Hadron Collider
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• What can we learn from the total width of the Higgs boson?
• The Standard Model from the LHC to future colliders: a contribution to the Workshop "What Next" of INFN
• Theory Summary and Prospects
• Quantum Critical Higgs: From AdS${}_5$ to Colliders
• Interference effects on Higgs mass measurement in $e^{+}{e}^{-}\to H(\gamma \gamma )Z$ at CEPC
• An approach to constraining the Higgs width at the LHC and HL-LHC
• Search for $\gamma$H production and constraints on the Yukawa couplings of light quarks to the Higgs boson
• Off-shell effects in Higgs decays to heavy gauge bosons and signal-background interference in Higgs decays to photons at a linear collider
• Measurements of Higgs boson production cross section in the four-lepton final state in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV
• A light CP-odd Higgs boson of the MSSM Higgs sector extended by dimension-six operators
• Impact of fermionic operators on the Higgs width measurement
• Anomalous $H\to ZZ\to 4\ell$ decay and its interference effects at the LHC
• Theoretical modeling of QCD radiation in off-shell Higgs production through gluon fusion
• Decay: A Monte Carlo library for the decay of a particle with ROOT compatibility