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Search for a new pseudoscalar decaying into a pair of muons in events with a top-quark pair at βˆšπ‘  =13 with the ATLAS detector

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A search for a new pseudoscalar π‘Ž-boson produced in events with a top-quark pair, where the π‘Ž-boson decays into a pair of muons, is performed using βˆšπ‘  =13 TeV 𝑝⁒𝑝 collision data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fbβˆ’1. The search targets th...

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Main Authors: Aad, Georges (Author) , Baltes, Lisa Marie (Author) , Bartels, Falk (Author) , Castillo, Florencia Luciana (Author) , Czurylo, Marta (Author) , Rio, Fernando del (Author) , Dittmeier, Sebastian (Author) , Dunford, Monica (Author) , Franchino, Silvia (Author) , Junkermann, Thomas (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) , Sothilingam, Varsiha (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: 28. November 2023
In: Physical review
Year: 2023, Volume: 108, Issue: 9, Pages: 1-26
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.092007
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.108.092007
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.092007
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Author Notes:G. Aad et al. (ATLAS Collaboration)
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Summary:A search for a new pseudoscalar π‘Ž-boson produced in events with a top-quark pair, where the π‘Ž-boson decays into a pair of muons, is performed using βˆšπ‘  =13 TeV 𝑝⁒𝑝 collision data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fbβˆ’1. The search targets the final state where only one top quark decays to an electron or muon, resulting in a signature with three leptons π‘’β’πœ‡β’πœ‡ and πœ‡β’πœ‡β’πœ‡. No significant excess of events above the Standard Model expectation is observed and upper limits are set on two signal models: 𝑝⁒𝑝 β†’π‘‘β’Β―π‘‘β’π‘Ž and 𝑝⁒𝑝 →𝑑⁒¯𝑑 with 𝑑 →𝐻±⁑𝑏, 𝐻± β†’π‘ŠΒ±β’π‘Ž, where π‘Ž β†’πœ‡β’πœ‡, in the mass ranges 15 GeV<π‘šπ‘Ž<72 GeV and 120 GeVβ‰€π‘šπ»Β±β‰€160 GeV.
Item Description:The ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser ... [und 2918 weitere]
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Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.092007

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