Measurement of muon pairs produced via γγ scattering in nonultraperipheral Pb + Pb collisions at √s.sub.NN./sub. = 5.02 TeV with the ATLAS detector

0577497 - FZÚ 2024 RIV US eng J - Článek v odborném periodiku
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 … celkem 2899 autorů
Measurement of muon pairs produced via γγ scattering in nonultraperipheral Pb + Pb collisions at √s_NN = 5.02 TeV with the ATLAS detector.
Physical Review C. Roč. 107, č. 5 (2023), č. článku 054907. ISSN 2469-9985. E-ISSN 2469-9993
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271
Klíčová slova: ATLAS * quark gluon * plasma * planarity * rapidity
Obor OECD: Particles and field physics
Impakt faktor: 3.1, rok: 2022
Způsob publikování: Open access

Results of a measurement of dimuon photoproduction in nonultraperipheral Pb+Pb collisions at sNN=5.02 TeV are presented. The measurement uses ATLAS data from the 2015 and 2018 Pb+Pb data-taking periods at the LHC with an integrated luminosity of 1.94nb−1. The γγ→μ+μ− pairs are identified via selections on pair momentum asymmetry and acoplanarity. Differential cross sections for dimuon production are measured in different centrality, average muon momentum, and pair rapidity intervals as functions of acoplanarity and k⊥, the transverse momentum kick of one muon relative to the other. Measurements are also made as a function of the rapidity separation of the muons and the angle of the muon pair relative to the second-order event plane to test whether magnetic fields generated in the quark-gluon plasma affect the measured muons. A prior observation of a centrality-dependent broadening of the acoplanarity distribution is confirmed.
Trvalý link: https://hdl.handle.net/11104/0346621