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English

Search for resonant and non-resonant Higgs boson pair production in the $ b\overline{b}{\tau}^{+}{\tau}^{-} $ decay channel using 13 TeV pp collision data from the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 2023, 40
Publication date2023
First online date2023-07-05
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 $ \sqrt{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.

eng
Keywords
  • Higgs Physics
  • Hadron-Hadron Scattering
  • Proton-Proton Scattering
  • P p: colliding beams
  • Resonance: production
  • Narrow resonance
  • Higgs particle: pair production
  • Resonance: scalar
  • P p: scattering
  • Higgs particle: decay modes
  • Higgs particle: hadronic decay
  • Bottom: pair production
  • Higgs particle: leptonic decay
  • Tau: pair production
  • Tau: decay modes
  • Tau: hadronic decay
  • Resonance: mass
  • Background
  • ATLAS
  • CERN LHC Coll
  • Kinematics
  • Channel cross section: upper limit
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for resonant and non-resonant Higgs boson pair production in the $ b\overline{b}{\tau}^{+}{\tau}^{-} $ decay channel using 13 TeV pp collision data from the ATLAS detector. In: The journal of high energy physics, 2023, vol. 2023, p. 40. doi: 10.1007/jhep07(2023)040
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Article (Published version)
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ISSN of the journal1029-8479
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