Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment



Aad, G, Abbott, B, Abbott, DC, Abeling, K, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC
et al (show 2921 more authors) (2023) Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment PHYSICS LETTERS B, 843. p. 137848. ISSN 0370-2693, 1873-2445

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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 A<inf>C</inf>=−0.003±0.029 in agreement with the Standard Model expectation.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 11 Jul 2023 11:43
Last Modified: 23 May 2026 07:29
DOI: 10.1016/j.physletb.2023.137848
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3171623
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