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

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...

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Main Authors: Aad, Georges (Author) , Baltes, Lisa Marie (Author) , Bartels, Falk (Author) , Castillo, Florencia Luciana (Author) , Czurylo, Marta (Author) , Dittmeier, Sebastian (Author) , Dunford, Monica (Author) , Franchino, Silvia (Author) , Klassen, Martin (Author) , Mkrtchyan, Tigran (Author) , Ott, Philipp (Author) , Rassloff, Damir Fabrice (Author) , Rodriguez Bosca, Sergi (Author) , Sauer, Christof (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Spieker, Thomas (Author) , Stamen, Rainer (Author) , Starovoitov, Pavel (Author) , Vigani, Luigi (Author) , Weber, Sebastian (Author) , Wessels, Martin (Author) , Zinßer, Joachim (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 05 July 2023
In: Journal of high energy physics
Year: 2023, Issue: 7, Pages: 1-62
ISSN:1029-8479
DOI:10.1007/JHEP07(2023)040
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP07(2023)040
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Author Notes:The ATLAS collaboration*
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Summary: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.
Item Description:Veröffentlicht: 05. Juli 2023
Im Titel steht der 2. Buchstabe b mit einem Oberstrich
Im Titel sind die Zeichen + und minus hochgestellt
*The ATLAS collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, T.M. Spieker, R. Stamen, P. Starovoitov, S.M. Weber, M. Wessels, L. Vigani, J. Zinsser [und sehr viele weitere Personen]
Gesehen am 14.12.2023
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP07(2023)040

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