Measurements of observables sensitive to colour reconnection in tt¯ events with the ATLAS detector at √s= 13 TeV

0577187 - FZÚ 2024 RIV DE eng J - Journal Article
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 … Total 2938 authors
Measurements of observables sensitive to colour reconnection in tt¯ events with the ATLAS detector at √s= 13 TeV.
European Physical Journal C. Roč. 83, č. 6 (2023), č. článku 518. ISSN 1434-6044. E-ISSN 1434-6052
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : ATLAS * pp: scattering * numerical calculations: Monte Carlo
OECD category: Particles and field physics
Impact factor: 4.4, year: 2022
Method of publishing: Open access

A measurement of observables sensitive to effects of colour reconnection in top-quark pair-production events is presented using 139 fb−1fb−1 of 13 TeV proton–proton collision data collected by the ATLAS detector at the LHC. Events are selected by requiring exactly one isolated electron and one isolated muon with opposite charge and two or three jets, where exactly two jets are required to be b-tagged. For the selected events, measurements are presented for the charged-particle multiplicity, the scalar sum of the transverse momenta of the charged particles, and the same scalar sum in bins of charged-particle multiplicity. These observables are unfolded to the stable-particle level, thereby correcting for migration effects due to finite detector resolution, acceptance and efficiency effects.
Permanent Link: https://hdl.handle.net/11104/0346409