Production of ϒ(nS) mesons in Pb + Pb and pp collisions at 5.02 TeV

0577503 - FZÚ 2024 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - 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 2899 authors
Production of ϒ(nS) mesons in Pb + Pb and pp collisions at 5.02 TeV.
Physical Review C. Roč. 107, č. 5 (2023), č. článku 054912. ISSN 2469-9985. E-ISSN 2469-9993
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : nucleon * pair * dimuon * decay * upsilon mesons: production
OECD category: Particles and field physics
Impact factor: 3.1, year: 2022
Method of publishing: Open access

A measurement of the production of vector bottomonium states, ϒ(1S), ϒ(2S), and ϒ(3S), in Pb+Pb and pp collisions at a center-of-mass energy per nucleon pair of 5.02 TeV is presented. The data correspond to integrated luminosities of 1.38nb−1 of Pb+Pb data collected in 2018, 0.44nb−1 of Pb+Pb data collected in 2015, and 0.26fb−1 of pp data collected in 2017 by the ATLAS detector at the Large Hadron Collider. The measurements are performed in the dimuon decay channel for transverse momentum pTμμ<30GeV, absolute rapidity |yμμ|<1.5, and Pb+Pb event centrality 0–80%. The production rates of the three bottomonium states in Pb+Pb collisions are compared with those in pp collisions to extract the nuclear modification factors as functions of event centrality, pTμμ, and |yμμ|. In addition, the suppression of the excited states relative to the ground state is studied. The results are compared with theoretical model calculations.
Permanent Link: https://hdl.handle.net/11104/0346626