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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

Aad G.
•
Abbott B.
•
Abbott D. C.
altro
Zwalinski L.
2023
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
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.]
DOI
10.1007/JHEP07(2023)040
WOS
WOS:001062395700001
Archivio
https://hdl.handle.net/11390/1254514
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85164470881
https://ricerca.unityfvg.it/handle/11390/1254514
Diritti
open access
Soggetti
  • Hadron-Hadron Scatter...

  • Higgs Physic

  • Proton-Proton Scatter...

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