Differential tt¯ cross-section measurements using boosted top quarks in the all-hadronic final state with 139 fb.sup.−1./sup. of ATLAS data

0577566 - FZÚ 2024 RIV DE eng J - Journal Article
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 … Total 2906 authors
Differential tt¯ cross-section measurements using boosted top quarks in the all-hadronic final state with 139 fb⁻¹ of ATLAS data.
Journal of High Energy Physics. Roč. 2023, č. 4 (2023), č. článku 080. ISSN 1029-8479. E-ISSN 1029-8479
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : Hadron-Hadron Scattering * jet substructure and boosted jets * top physics
OECD category: Particles and field physics
Impact factor: 5.4, year: 2022
Method of publishing: Open access

Measurements of single-, double-, and triple-differential cross-sections are presented for boosted top-quark pair-production in 13 TeV proton–proton collisions recorded by the ATLAS detector at the LHC. The top quarks are observed through their hadronic decay and reconstructed as large-radius jets with the leading jet having transverse momentum (pTT​) greater than 500 GeV. The observed data are unfolded to remove detector effects. The particle-level cross-section, multiplied by the tt‾→WWbb‾tt→WWbb branching fraction and measured in a fiducial phase space defined by requiring the leading and second-leading jets to have pTT​> 500 GeV and pTT​> 350 GeV, respectively, is 331 ± 3(stat.) ± 39(syst.) fb. This is approximately 20% lower than the prediction of 398−49+48398−49+48​ fb by Powheg+Pythia 8 with next-to-leading-order (NLO) accuracy but consistent within the theoretical uncertainties.
Permanent Link: https://hdl.handle.net/11104/0346802