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

doi:10.1016/j.physletb.2023.137848

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/87812

Título:	Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment
Autor(es):	Castro, Nuno Filipe Onofre, A. ATLAS Collaboration
Data:	2023
Editora:	Elsevier 1
Revista:	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Citação:	Aad, G., Abbott, B., Abbott, D. C., Abeling, K., Abidi, S. H., Aboulhorma, A., . . . Zwalinski, L. (2023). Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment. [Article]. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 843. doi: 10.1016/j.physletb.2023.137848
Resumo(s):	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.
Tipo:	Artigo
URI:	https://hdl.handle.net/1822/87812
DOI:	10.1016/j.physletb.2023.137848
ISSN:	0370-2693
e-ISSN:	1873-2445
Versão da editora:	https://www.sciencedirect.com/science/article/pii/S037026932300182X
Arbitragem científica:	yes
Acesso:	Acesso aberto
Aparece nas coleções:	LIP - Artigos/papers