Open Collections

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

Springer Berlin Heidelberg

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.

Article

eng

Vancouver : University of British Columbia Library

10.14288/1.0435891

Science, Faculty of; TRIUMF; Non UBC; Physics and Astronomy, Department of

10.1007/JHEP07(2023)040

Faculty; Researcher

http://creativecommons.org/licenses/by/4.0/