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

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 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

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Article number	137848
Pages (from-to)	1-21
Number of pages	21
Journal	Physics Letters B
Volume	843
DOIs	https://doi.org/10.1016/j.physletb.2023.137848
Publication status	Published - 10 Aug 2023

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http://arxiv.org/abs/2212.10552

3 Finished
3 Active

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P.
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/10/22 → 30/09/25
Project: Research

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ATLAS Publications, Carter, T. M., Gonzalez Andana, R. Y., Hasib, A., Heath, M. P., Parrish, V. A., Takeva, E. P., Themistokleous, N., Villhauer, E. M., & Zaid, E. (2023). Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment. Physics Letters B, 843, 1-21. Article 137848. https://doi.org/10.1016/j.physletb.2023.137848

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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 (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.",

author = "{ATLAS Publications} and Clark, {Philip James} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, {Victoria Jane} and Liza Mijovic and Benjamin Wynne and Sara Alderweireldt and T.M. Carter and {Gonzalez Andana}, R.Y. and A. Hasib and M.P. Heath and V.A. Parrish and E.P. Takeva and N. Themistokleous and E.M. Villhauer and E. Zaid",

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

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

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Alderweireldt, Sara

AU - Carter, T.M.

AU - Gonzalez Andana, R.Y.

AU - Hasib, A.

AU - Heath, M.P.

AU - Parrish, V.A.

AU - Takeva, E.P.

AU - Themistokleous, N.

AU - Villhauer, E.M.

AU - Zaid, E.

PY - 2023/8/10

Y1 - 2023/8/10

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AB - 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.

U2 - 10.1016/j.physletb.2023.137848

DO - 10.1016/j.physletb.2023.137848

M3 - Article

SN - 0370-2693

VL - 843

SP - 1

EP - 21

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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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this