Measurements of differential cross-sections in top-quark pair events with a high transverse momentum top quark and limits on beyond the Standard Model contributions to top-quark pair production with the ATLAS detector at √s = 13 TeV

0562837 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … celkem 2870 autorů
Measurements of differential cross-sections in top-quark pair events with a high transverse momentum top quark and limits on beyond the Standard Model contributions to top-quark pair production with the ATLAS detector at √s = 13 TeV.
Journal of High Energy Physics. Roč. 2022, č. 6 (2022), č. článku 063. ISSN 1029-8479. E-ISSN 1029-8479
Výzkumná infrastruktura: e-INFRA CZ - 90140; CERN-CZ II - 90104
Institucionální podpora: RVO:68378271
Klíčová slova: Top Physics * Beyond Standard Model * Hadron-Hadron Scattering
Obor OECD: Particles and field physics
Impakt faktor: 5.4, rok: 2022
Způsob publikování: Open access

ross-section measurements of top-quark pair production where the hadronically decaying top quark has transverse momentum greater than 355 GeV and the other top quark decays into ℓνb are presented using 139 fb−1−1 of data collected by the ATLAS experiment during proton-proton collisions at the LHC. The fiducial cross-section at ss ​ = 13 TeV is measured to be σ = 1.267 ± 0.005 ± 0.053 pb, where the uncertainties reflect the limited number of data events and the systematic uncertainties, giving a total uncertainty of 4.2%. The cross-section is measured differentially as a function of variables characterising the tt‾tt system and additional radiation in the events. The results are compared with various Monte Carlo generators, including comparisons where the generators are reweighted to match a parton-level calculation at next-to-next-to-leading order. The reweighting improves the agreement between data and theory.
Trvalý link: https://hdl.handle.net/11104/0336291