Search for resonant and non-resonant Higgs boson pair production in the bb¯ τ+τ decay channel using 13 TeV pp collision data from the ATLAS detector

The ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A search for Higgs boson pair production in events with two b-jets and two τ-leptons is presented, using a proton–proton collision dataset with an integrated luminosity of 139 fb −1 collected at s = 13 TeV by the ATLAS experiment at the LHC. Higgs boson pairs produced non-resonantly or in the decay of a narrow scalar resonance in the mass range from 251 to 1600 GeV are targeted. Events in which at least one τ-lepton decays hadronically are considered, and multivariate discriminants are used to reject the backgrounds. No significant excess of events above the expected background is observed in the non-resonant search. The largest excess in the resonant search is observed at a resonance mass of 1 TeV, with a local (global) significance of 3.1σ (2.0σ). Observed (expected) 95% confidence-level upper limits are set on the non-resonant Higgs boson pair-production cross-section at 4.7 (3.9) times the Standard Model prediction, assuming Standard Model kinematics, and on the resonant Higgs boson pair-production cross-section at between 21 and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance. [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number40
JournalJournal of High Energy Physics
Volume2023
Issue number7
DOIs
StatePublished - Jul 2023

Keywords

  • Hadron-Hadron Scattering
  • Higgs Physics
  • Proton-Proton Scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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