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Search for single-production of vector-like quarks decaying into Wb in the fully hadronic final state in pp collisions at √𝑠 = 13 TeV with the ATLAS detector

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A search for T and Y vector-like quarks produced in proton-proton collisions at a centre-of-mass energy of 13 TeV and decaying into Wb in the fully hadronic final state is presented. The search uses 139 fb−1 of data collected by the ATLAS detector at the LHC from 2015 to 2018. The final state is cha...

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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) , Ott, Philipp (Author) , Rassloff, Damir Fabrice (Author) , Sanfilippo, Lorenzo (Author) , Schultz-Coulon, Hans-Christian (Author) , Sothilingam, Varsiha (Author) , Stamen, Rainer (Author) , Weber, Sebastian (Author) , Wessels, Martin (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 12 February 2025
In: Journal of high energy physics
Year: 2025, Issue: 2, Pages: 1-44
ISSN:1029-8479
DOI:10.1007/JHEP02(2025)075
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP02(2025)075
Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP02(2025)075
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Author Notes:the ATLAS collaboration
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Summary:A search for T and Y vector-like quarks produced in proton-proton collisions at a centre-of-mass energy of 13 TeV and decaying into Wb in the fully hadronic final state is presented. The search uses 139 fb−1 of data collected by the ATLAS detector at the LHC from 2015 to 2018. The final state is characterised by a hadronically decaying W boson with large Lorentz boost and a b-tagged jet, which are used to reconstruct the invariant mass of the vector-like quark candidate. The main background is QCD multijet production, which is estimated using a data-driven method. Upon finding no significant excess in data, mass limits at 95% confidence level are obtained as a function of the global coupling parameter, κ. The observed lower limits on the masses of Y quarks with κ = 0.5 and κ = 0.7 are 2.0 TeV and 2.4 TeV, respectively. For T quarks, the observed mass limits are 1.4 TeV for κ = 0.5 and 1.9 TeV for κ = 0.7.
Item Description:The ATLAS collaboration: G. Aad, A. Ackermann, L.M. Baltes, F. Bartels, S. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, P. Ott, D. F. Rassloff, L. Sanfilippo, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, S. Weber, M. Wessels und weitere 2383
Gesehen am 12.11.2025
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP02(2025)075

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