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Combination of searches for singly produced vectorlike top quarks in 𝑝⁒𝑝 collisions at βˆšπ‘  =13  TeV with the ATLAS detector

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A combination of searches for the single production of vectorlike top quarks (𝑇) is presented. These analyses are based on proton-proton collisions at βˆšπ‘  =13 TeV recorded in 2015-2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 139 fbβˆ’1. The 𝑇 d...

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Main Authors: Aad, Georges (Author) , Ackermann, Anke (Author) , Baltes, Lisa Marie (Author) , Bartels, Falk (Author) , Dittmeier, Sebastian (Author) , Dunford, Monica (Author) , Franchino, Silvia (Author) , Junkermann, Thomas (Author) , Mkrtchyan, Tigran (Author) , Sanfilippo, Lorenzo (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Sothilingam, Varsiha (Author) , Stamen, Rainer (Author) , Starovoitov, Pavel (Author) , Vigani, Luigi (Author) , Wessels, Martin (Author) , Zinßer, Joachim (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 29 January, 2025
In: Physical review
Year: 2025, Volume: 111, Issue: 1, Pages: 1-30
ISSN:2470-0029
DOI:10.1103/PhysRevD.111.012012
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.111.012012
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.111.012012
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Author Notes:ATLAS Collaboration
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Summary:A combination of searches for the single production of vectorlike top quarks (𝑇) is presented. These analyses are based on proton-proton collisions at βˆšπ‘  =13 TeV recorded in 2015-2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 139 fbβˆ’1. The 𝑇 decay modes considered in this combination are into a top quark and either a Standard Model Higgs boson or a 𝑍 boson (𝑇 →𝐻⁑𝑑 and 𝑇→𝑍⁒𝑑). The individual searches used in the combination are differentiated by the number of leptons (𝑒, πœ‡) in the final state. The observed data are found to be in good agreement with the Standard Model background prediction. Interpretations are provided for a range of masses and couplings of the vectorlike top quark for benchmark models and generalized representations in terms of 95% confidence level limits. For a benchmark signal prediction of a vectorlike top quark SU(2) singlet with electroweak coupling, πœ…, of 0.5, masses below 2.1 TeV are excluded, resulting in the most restrictive limits to date.
Item Description:The ATLAS Collaboration: G. Aad, A. Ackermann, L.M. Baltes, F. Bartels, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, L. Sanfilippo, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, T.M. Spieker, R. Stamen, P. Starovoitov, L. Vigani, M. Wessels, J. Zinsser [und 2918 weitere]
Gesehen am 19.11.2025
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.111.012012

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