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

The ATLAS collaboration

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

The ATLAS collaboration

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

6 Citations (Scopus)

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_C=−0.003±0.029 in agreement with the Standard Model expectation.

Original language	English
Article number	137848
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
Externally published	Yes

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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 (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.",

author = "\{The ATLAS collaboration\} and Scyboz, \{L. M.\}",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s)",

year = "2023",

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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 - The ATLAS collaboration

AU - Scyboz, L. M.

PY - 2023/8/10

Y1 - 2023/8/10

N2 - 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.

AB - 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.

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DO - 10.1016/j.physletb.2023.137848

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SN - 0370-2693

VL - 843

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

Abstract

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