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

Aad, G; Abbott, B; Abbott, DC; Abeling, K; Abidi, SH; Aboulhorma, A; Abramowicz, H; ... et, alia; + view all (2023) Production of ϒ(nS) mesons in Pb + Pb and pp collisions at 5.02 TeV. Physical Review C , 107 (5) , Article 054912. 10.1103/PhysRevC.107.054912. Green open access

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Abstract

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 1.38 nb-1 of Pb + Pb data collected in 2018, 0.44 nb-1 of Pb + Pb data collected in 2015, and 0.26 fb-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 pμμT < 30 GeV, 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, pμμT, 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.

Type: Article
Title: Production of ϒ(nS) mesons in Pb + Pb and pp collisions at 5.02 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevC.107.054912
Publisher version: https://doi.org/10.1103/PhysRevC.107.054912
Language: English
Additional information: © 2023 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10175848
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