Search for leptonic charge asymmetry in tt¯W production in final states with three leptons at √s = 13 TeV

0576778 - FZÚ 2024 RIV DE eng J - Článek v odborném periodiku
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 … celkem 2897 autorů
Search for leptonic charge asymmetry in tt¯W production in final states with three leptons at √s = 13 TeV.
Journal of High Energy Physics. Roč. 2023, č. 7 (2023), č. článku 033. ISSN 1029-8479. E-ISSN 1029-8479
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271
Klíčová slova: hadron-hadron scattering * top physics * pp: scattering
Obor OECD: Particles and field physics
Impakt faktor: 5.4, rok: 2022
Způsob publikování: Open access

A search for the leptonic charge asymmetry (AcℓAcℓ​) of top-quark-antiquark pair production in association with a W boson (tt‾WttW) is presented. The search is performed using final states with exactly three charged light leptons (electrons or muons) and is based on ss ​ = 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN during the years 2015–2018, corresponding to an integrated luminosity of 139 fb−1−1. A profile-likelihood fit to the event yields in multiple regions corresponding to positive and negative differences between the pseudorapidities of the charged leptons from top-quark and top-antiquark decays is used to extract the charge asymmetry. At reconstruction level, the asymmetry is found to be −0.12 ± 0.14 (stat.) ± 0.05 (syst.).
Trvalý link: https://hdl.handle.net/11104/0346193