Measurement of suppression of large-radius jets and its dependence on substructure in Pb+Pb collisions at √s.sub.NN./sub.=5.02 TeV with the ATLAS detector

0581796 - FZÚ 2024 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abeling, K. - 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 2826 authors
Measurement of suppression of large-radius jets and its dependence on substructure in Pb+Pb collisions at √s_NN=5.02 TeV with the ATLAS detector.
Physical Review Letters. Roč. 131, č. 17 (2023), č. článku 172301. ISSN 0031-9007. E-ISSN 1079-7114
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : splitting * structure * nucleus * TeV * ATLAS * quenching
OECD category: Particles and field physics
Impact factor: 8.6, year: 2022
Method of publishing: Open access

This letter presents a measurement of the nuclear modification factor of large-radius jets in sNN=5.02  TeV Pb+Pb collisions by the ATLAS experiment. The measurement is performed using 1.72  nb-1 and 257  pb-1 of Pb+Pb and pp data, respectively. The large-radius jets are reconstructed with the anti-kt algorithm using a radius parameter of R=1.0, by reclustering anti-kt R=0.2 jets, and are measured over the transverse momentum (pT) kinematic range of 158<pT<1000  GeV and absolute pseudorapidity |y|<2.0. The large-radius jet constituents are further reclustered using the kt algorithm in order to obtain the splitting parameters, d12 and ΔR12, which characterize the transverse momentum scale and angular separation for the hardest splitting in the jet, respectively. The nuclear modification factor, RAA, obtained by comparing the Pb+Pb jet yields to those in pp collisions, is measured as a function of jet transverse momentum (pT) and d12 or ΔR12.

Permanent Link: https://hdl.handle.net/11104/0349945