Search for nonresonant pair production of Higgs bosons in the $b\bar{b}b\bar{b}$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

A search for nonresonant Higgs boson pair production in the $b\bar{b}b\bar{b}$ final state is presented. The analysis uses 126 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector at the Large Hadron Collider, and targets both the gluon-gluon fusion and vector-boson fusion production modes. No evidence of the signal is found and the observed (expected) upper limit on the cross-section for nonresonant Higgs boson pair production is determined to be 5.4 (8.1) times the Standard Model predicted cross-section at 95% confidence level. Constraints are placed on modifiers to the $HHH$ and $HHVV$ couplings. The observed (expected) $2\sigma$ constraints on the $HHH$ coupling modifier, ${\kappa }_{\lambda }$, are determined to be $[-3.5,11.3]$ ($[-5.4,11.4]$), while the corresponding constraints for the $HHVV$ coupling modifier, ${\kappa }_{2V}$, are $[-0.0,2.1]$ ($[-0.1,2.1]$). In addition, constraints on relevant coefficients are derived in the context of the Standard Model effective field theory and Higgs effective field theory, and upper limits on the $HH$ production cross-section are placed in seven Higgs effective field theory benchmark scenarios.

55 pages in total, author list starting page 38, 15 figures, 10 tables, published to Phys. Rev. D: Phys. Rev. D 108 (2023) 052003. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2019-29/

References in corpus (23)

• 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
• An Introduction to PYTHIA 8.2
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Herwig++ Physics and Manual
• Parton distributions in the LHC era: MMHT 2014 PDFs
• A portrait of the Higgs boson by the CMS experiment ten years after the discovery
• 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
• Jet energy scale and resolution measured in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Colour reconnections in Herwig++
• Automated one-loop computations in the SMEFT
• Evidence for the $H\to b\bar{b}$ decay with the ATLAS detector
• Vector-Boson Fusion Higgs Pair Production at N${}^3$LO
• $gg\to HH$: Combined Uncertainties
• Measurement of the $c$-jet mistagging efficiency in $t\bar{t}$ events using $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector
• Search for nonresonant Higgs boson pair production in final states with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for resonant and non-resonant Higgs boson pair production in the $b\bar{b}{\tau }^{+}{\tau }^{-}$ decay channel using 13 TeV $pp$ collision data from the ATLAS detector
• Exploring anomalous couplings in Higgs boson pair production through shape analysis
• Search for non-resonant Higgs boson pair production in the $bb\ell \nu \ell \nu$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$ TeV
• Configuration and performance of the ATLAS $b$-jet triggers in Run 2
• Search for the $HH\to b\bar{b}b\bar{b}$ process via vector-boson fusion production using proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Cited by in corpus (18)

• Combination of searches for Higgs boson pair production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Belle II sensitivity to long-lived dark photons
• The ATLAS Trigger System for LHC Run 3 and Trigger performance in 2022
• The scale invariant scotogenic model: CDF-II $W$-boson mass and the 95 GeV excesses
• Search for the non-resonant production of Higgs boson pairs via gluon fusion and vector-boson fusion in the $b\bar{b}{\tau }^{+}{\tau }^{-}$ final state in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• An implementation of neural simulation-based inference for parameter estimation in ATLAS
• New physics implications of VBF searches exemplified through the Georgi-Machacek model
• Exploring correlations between HEFT Higgs couplings ${\kappa }_V$ and ${\kappa }_{2V}$ via HH production at $e^{+}{e}^{-}$ colliders
• Machine-Learning Performance on Higgs-Pair Production Associated with Dark Matter at the LHC
• Improvement and generalization of ABCD method with Bayesian inference
• Search for ZZ and ZH production in the $\mathrm{b}\bar{\mathrm{b}}\mathrm{b}\bar{\mathrm{b}}$ final state using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Inferring flavor mixtures in multijet events
• A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps
• Higgs Boson Searches at the LHC Beyond the Standard Model
• HL-LHC sensitivity to higgsinos from natural SUSY with gravitino LSP
• Configuration, Performance, and Commissioning of the ATLAS $b$-jet Triggers for the 2022 and 2023 LHC data-taking periods
• Effect of anomalous $HHH$ and $ZZHH$ couplings on the decay width of $H\to {\nu }_e{\bar{\nu }}_e{\nu }_{\mu }{\bar{\nu }}_{\mu }$
• Electroweak Higgs boson pair production: Updated inclusive cross sections