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



Aad, G, Abbott, B, Abbott, DC, Abeling, K, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC
et al (show 2889 more authors) (2023) Production of Υ(nS) mesons in Pb plus Pb and pp collisions at 5.02 TeV PHYSICAL REVIEW C, 107 (5). 054912-. ISSN 2469-9985, 2469-9993

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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<sup>-1</sup> of Pb + Pb data collected in 2018, 0.44 nb<sup>-1</sup> of Pb + Pb data collected in 2015, and 0.26 fb<sup>-1</sup> 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 p<sup>μμ</sup><inf>T</inf> < 30 GeV, absolute rapidity |y<sup>μμ</sup>| < 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, p<sup>μμ</sup><inf>T</inf>, and |y<sup>μμ</sup>|. In addition, the suppression of the excited states relative to the ground state is studied. The results are compared with theoretical model calculations.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 29 Aug 2023 08:04
Last Modified: 23 May 2026 07:45
DOI: 10.1103/PhysRevC.107.054912
Open Access URL: https://journals.aps.org/prc/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3172377
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