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Combination of searches for singly produced vectorlike top quarks in (Formula presented) collisions at (Formula presented) with the ATLAS detector

Aad, G. ; Åkesson, T.P.A. LU orcid ; Astrand, K.S.V. LU ; Doglioni, C. LU ; Ekman, P.A. LU orcid ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid and Poettgen, R. LU orcid , et al. (2025) In Physical Review D 111(1).
Abstract
A combination of searches for the single production of vectorlike top quarks ((Formula presented)) is presented. These analyses are based on proton-proton collisions at (Formula presented) recorded in 2015-2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of (Formula presented). The (Formula presented) decay modes considered in this combination are into a top quark and either a Standard Model Higgs boson or a (Formula presented) boson ((Formula presented) and (Formula presented)). The individual searches used in the combination are differentiated by the number of leptons ((Formula presented), (Formula presented)) in the final state. The observed data are found to be in good agreement with... (More)
A combination of searches for the single production of vectorlike top quarks ((Formula presented)) is presented. These analyses are based on proton-proton collisions at (Formula presented) recorded in 2015-2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of (Formula presented). The (Formula presented) decay modes considered in this combination are into a top quark and either a Standard Model Higgs boson or a (Formula presented) boson ((Formula presented) and (Formula presented)). The individual searches used in the combination are differentiated by the number of leptons ((Formula presented), (Formula presented)) 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, (Formula presented), of 0.5, masses below 2.1 TeV are excluded, resulting in the most restrictive limits to date. © 2025 CERN, for the ATLAS Collaboration. (Less)
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
111
issue
1
article number
012012
publisher
American Physical Society
external identifiers
  • scopus:85217853125
ISSN
2470-0010
DOI
10.1103/PhysRevD.111.012012
language
English
LU publication?
yes
additional info
Number of authors = 2884 EID = 85217853125 Article no = 012012 Affiliation = Gallagher J., Department of Physics, University of Adelaide, Adelaide, Australia Affiliation = Tipton P., Department of Physics, Yale University, New Haven, CT, United States Affiliation = Harkusha S., Yerevan Physics Institute, Yerevan, Armenia
id
e125e206-947a-43f1-8264-9083f819f894
date added to LUP
2025-12-17 14:48:07
date last changed
2025-12-17 14:48:55
@article{e125e206-947a-43f1-8264-9083f819f894,
  abstract     = {{A combination of searches for the single production of vectorlike top quarks ((Formula presented)) is presented. These analyses are based on proton-proton collisions at (Formula presented) recorded in 2015-2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of (Formula presented). The (Formula presented) decay modes considered in this combination are into a top quark and either a Standard Model Higgs boson or a (Formula presented) boson ((Formula presented) and (Formula presented)). The individual searches used in the combination are differentiated by the number of leptons ((Formula presented), (Formula presented)) 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, (Formula presented), of 0.5, masses below 2.1 TeV are excluded, resulting in the most restrictive limits to date. © 2025 CERN, for the ATLAS Collaboration.}},
  author       = {{Aad, G. and Åkesson, T.P.A. and Astrand, K.S.V. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Smirnova, O. and Wallin, E.J. and Zwalinski, L.}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{Combination of searches for singly produced vectorlike top quarks in (Formula presented) collisions at (Formula presented) with the ATLAS detector}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.111.012012}},
  doi          = {{10.1103/PhysRevD.111.012012}},
  volume       = {{111}},
  year         = {{2025}},
}