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Abstract / Description of output
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 21and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance.
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 21and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance.
Original language | English |
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Article number | 40 |
Pages (from-to) | 1-61 |
Number of pages | 61 |
Journal | Journal of High Energy Physics |
Volume | 2023 |
Issue number | 7 |
DOIs | |
Publication status | Published - 5 Jul 2023 |
Keywords / Materials (for Non-textual outputs)
- Higgs Physics
- Hadron-Hadron Scattering
- Proton-Proton Scattering