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

ATLAS Publications, T.M. Carter, R.Y. Gonzalez Andana, A. Hasib, M.P. Heath, V.A. Parrish, E.P. Takeva, N. Themistokleous, E.M. Villhauer, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A measurement of the charge asymmetry in top-quark pair (t¯t) production in association with a photon is presented. The measurement is performed in the single-lepton t¯t 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.
Original languageEnglish
Article number137848
Pages (from-to)1-21
Number of pages21
JournalPhysics Letters B
Volume843
DOIs
Publication statusPublished - 10 Aug 2023

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