Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment
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Department of Physics, University of ArizonaIssue Date
2023-08-10Metadata
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Elsevier B.V.Citation
Aad, Georges, et al. "Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment." Physics Letters B 843 (2023): 137848.Rights
© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
A measurement of the charge asymmetry in top-quark pair (tt¯) production in association with a photon is presented. The measurement is performed in the single-lepton tt¯ decay channel using proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015–2018, corresponding to an integrated luminosity of 139 fb−1. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be AC=−0.003±0.029 in agreement with the Standard Model expectation. © 2023 The Author(s)Note
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0370-2693Version
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Except where otherwise noted, this item's license is described as © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).