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 - 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
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
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : ATLAS * quark gluon * plasma * planarity * rapidity
OECD category: Particles and field physics
Impact factor: 3.1, year: 2022
Method of publishing: 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.
Permanent Link: https://hdl.handle.net/11104/0346621