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

Aad, G.; Abbott, B.; Abbott, D.C.; Chudoba, Jiří; Federičová, Pavla; Hejbal, Jiří; Jačka, Petr; Kepka, Oldřich; Kroll, Jiří; Kupčo, Alexander; Latoňová, Věra; Lokajíček, Miloš; Lysák, Roman; Marčišovský, Michal; Mikeštíková, Marcela; Němeček, Stanislav; Šícho, Petr; Staroba, Pavel; Svatoš, Michal; Taševský, Marek

doi:https://dx.doi.org/10.1016/j.physletb.2023.137848

Number of the records: 1

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

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SYSNO ASEP	0577657
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve SCOPUS
Title	Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment
Author(s)	Aad, G. (FR) Abbott, B. (US) Abbott, D.C. (US) Chudoba, Jiří (FZU-D)_{RID, ORCID} Federičová, Pavla (FZU-D)_ORCID Hejbal, Jiří (FZU-D)_{RID, ORCID} Jačka, Petr (FZU-D)_ORCID Kepka, Oldřich (FZU-D)_{RID, ORCID} Kroll, Jiří (FZU-D)_ORCID Kupčo, Alexander (FZU-D)_{RID, ORCID} Latoňová, Věra (FZU-D)_ORCID Lokajíček, Miloš (FZU-D)_{RID, ORCID} Lysák, Roman (FZU-D)_{RID, ORCID} Marčišovský, Michal (FZU-D)_{RID, ORCID} Mikeštíková, Marcela (FZU-D)_{RID, ORCID} Němeček, Stanislav (FZU-D)_{RID, ORCID} Šícho, Petr (FZU-D)_{RID, ORCID} Staroba, Pavel (FZU-D)_{RID, ORCID} Svatoš, Michal (FZU-D)_{RID, ORCID} Taševský, Marek (FZU-D)_{RID, ORCID}
Number of authors	2934
Article number	137848
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 843, Aug (2023)
Number of pages	21 s.
Language	eng - English
Country	NL - Netherlands
Keywords	ATLAS ; CERN Lab ; photon: associated production ; final state: ((n)jet lepton)
Subject RIV	BF - Elementary Particles and High Energy Physics
OECD category	Particles and field physics
Research Infrastructure	CERN-CZ III - 90240 - Fyzikální ústav AV ČR, v. v. i.
Method of publishing	Open access
Institutional support	FZU-D - RVO:68378271
EID SCOPUS	85165936778
DOI	10.1016/j.physletb.2023.137848
Annotation	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.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2024
Electronic address	https://hdl.handle.net/11104/0346790

Number of the records: 1