Constraining off-shell Higgs boson production and the Higgs boson total width using $WW\to \ell \nu \ell \nu$ final states with the ATLAS detector

Abstract

A measurement of off-shell Higgs boson production is performed in the $H^{\ast }\to WW$ channel. The measurement uses a proton-proton collision dataset with an integrated luminosity of 140 fb${}^{-1}$ collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Final states in which both $W$ bosons decay leptonically are targeted, and events are categorised based on the flavour of the final-state leptons, the jet multiplicity, and the output of neural-network-based classifiers. The data are found to be compatible with the Standard Model expectation. An observed (expected) upper bound on the 95% symmetric confidence level interval is set on the rate of off-shell Higgs boson production at a value of 3.4 (4.4) times the Standard Model prediction. These results are combined with the results from the measurement of on-shell Higgs boson production in the same final states to obtain an observed (expected) upper bound at 95% confidence level on the Higgs boson total width of 13.1 (17.3) MeV.

44 pages in total, author list starting page 27, 4 figures, 1 table, published in Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGP-2024-05/

References in corpus (83)

• 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
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Theory and phenomenology of two-Higgs-doublet models
• Parton distributions for the LHC Run II
• Herwig++ Physics and Manual
• Parton distributions with LHC data
• The ATLAS Simulation Infrastructure
• PDF4LHC recommendations for LHC Run II
• The Minimal Composite Higgs Model
• Parton distributions in the LHC era: MMHT 2014 PDFs
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Scattering Amplitudes with Open Loops
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Herwig 7.0 / Herwig++ 3.0 Release Note
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• QCD Matrix Elements + Parton Showers
• Comix, a new matrix element generator
• Event Generation with Sherpa 2.2
• An NNLO subtraction formalism in hadron collisions and its application to Higgs boson production at the LHC
• QCD matrix elements + parton showers: The NLO case
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• Performance of the ATLAS Trigger System in 2015
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• QCD matrix elements and truncated showers
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Single-top hadroproduction in association with a W boson
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Higgs boson gluon-fusion production in N3LO QCD
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• A critical appraisal of NLO+PS matching methods
• OpenLoops 2
• Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data
• Hadronic top-quark pair production with NNLL threshold resummation
• Jet reconstruction and performance using particle flow with the ATLAS Detector
• ATLAS $b$-jet identification performance and efficiency measurement with $t\bar{t}$ events in $pp$ collisions at $\sqrt{s}=13$ TeV
• NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG
• Performance of electron and photon triggers in ATLAS during LHC Run 2
• Muon reconstruction and identification efficiency in ATLAS using the full Run 2 $pp$ collision data set at $\sqrt{s}=13$ TeV
• ATLAS data quality operations and performance for 2015-2018 data-taking
• Fully differential NNLO computations with MATRIX
• Performance of the ATLAS muon triggers in Run 2
• Fully differential Higgs boson production and the di-photon signal through next-to-next-to-leading order
• Higgs boson production in association with top quarks in the POWHEG BOX
• Constraining the Higgs boson width with ZZ production at the LHC
• HW/HZ + 0 and 1 jet at NLO with the POWHEG BOX interfaced to GoSam and their merging within MiNLO
• Top-pair production at the LHC through NNLO QCD and NLO EW
• Luminosity determination in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector at the LHC
• On-the-fly reduction of open loops
• Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector
• A method for identifying H -> tau tau -> e mu pTmiss at the CERN LHC
• Constraints on the off-shell Higgs boson signal strength in the high-mass $ZZ$ and $WW$ final states with the ATLAS detector
• Bounding the Higgs width at the LHC: complementary results from $H\to WW$
• Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
• Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector
• 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
• Software and computing for Run 3 of the ATLAS experiment at the LHC
• Sigma Models with Negative Curvature
• The ATLAS Inner Detector Trigger performance in pp collisions at 13 TeV during LHC Run 2
• Higgs Interference Effects in $\Pg \Pg \to \PZ\PZ$ and their Uncertainty
• (Dys)Zphilia or a custodial breaking Higgs at the LHC
• Electron and photon efficiencies in LHC Run 2 with the ATLAS experiment
• Evidence of off-shell Higgs boson production from $ZZ$ leptonic decay channels and constraints on its total width with the ATLAS detector
• Four-lepton production in gluon fusion at NLO matched to parton showers
• The performance of missing transverse momentum reconstruction and its significance with the ATLAS detector using 140 fb${}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collisions
• Measurements of $WH$ and $ZH$ production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in $13\mathrm{TeV}$ $pp$ collisions with the ATLAS detector
• NLO QCD and EW corrections to vector-boson scattering into ${\mathrm{W}}^{+}{\mathrm{W}}^{-}$ at the LHC
• 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
• Custodial Symmetry Breaking and Higgs Signatures at the LHC
• On the terms violating the custodial symmetry in multi-Higgs-doublet models
• What can we learn from the total width of the Higgs boson?

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