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

ATLAS Collaboration; Paul Newman

doi:10.1016/j.physletb.2023.137848

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

ATLAS Collaboration, Paul Newman

Physics and Astronomy

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Abstract

A measurement of the charge asymmetry in top-quark pair (tt̅) production in association with a photon is presented. The measurement is performed in the single-lepton tt̅ 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_C=−0.003±0.029 in agreement with the Standard Model expectation.

Original language	English
Article number	137848
Journal	Physics Letters B
Early online date	20 Jun 2023
DOIs	https://doi.org/10.1016/j.physletb.2023.137848
Publication status	E-pub ahead of print - 20 Jun 2023

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@article{2a432bba73f8415eb192f10b46aa9ace,

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

abstract = "A measurement of the charge asymmetry in top-quark pair (tt̅) production in association with a photon is presented. The measurement is performed in the single-lepton tt̅ 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.",

author = "{ATLAS Collaboration} and Paul Newman",

year = "2023",

month = jun,

day = "20",

doi = "10.1016/j.physletb.2023.137848",

language = "English",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment

AU - ATLAS Collaboration

AU - Newman, Paul

PY - 2023/6/20

Y1 - 2023/6/20

N2 - A measurement of the charge asymmetry in top-quark pair (tt̅) production in association with a photon is presented. The measurement is performed in the single-lepton tt̅ 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.

AB - A measurement of the charge asymmetry in top-quark pair (tt̅) production in association with a photon is presented. The measurement is performed in the single-lepton tt̅ 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.

UR - https://arxiv.org/abs/2212.10552v1

U2 - 10.1016/j.physletb.2023.137848

DO - 10.1016/j.physletb.2023.137848

M3 - Article

SN - 0370-2693

JO - Physics Letters B

JF - Physics Letters B

M1 - 137848

ER -

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

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