Prompt and non-prompt J/ψ production at midrapidity in Pb-Pb collisions at √sNN=5.02 TeV



Acharya, S, Adamova, D, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I, Akindinov, A
et al (show 1044 more authors) (2024) Prompt and non-prompt J/ψ production at midrapidity in Pb-Pb collisions at √sNN=5.02 TeV JOURNAL OF HIGH ENERGY PHYSICS, 2024 (2). 66-. ISSN 1029-8479, 1029-8479

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Abstract

The transverse momentum (p<inf>T</inf>) and centrality dependence of the nuclear modification factor R<inf>AA</inf> of prompt and non-prompt J/ψ, the latter originating from the weak decays of beauty hadrons, have been measured by the ALICE collaboration in Pb–Pb collisions at s<inf>NN</inf> = 5.02 TeV. The measurements are carried out through the e<sup>+</sup>e<sup>−</sup> decay channel at midrapidity (|y| < 0.9) in the transverse momentum region 1.5 < p<inf>T</inf> < 10 GeV/c. Both prompt and non-prompt J/ψ measurements indicate a significant suppression for p<inf>T</inf> > 5 GeV/c, which becomes stronger with increasing collision centrality. The results are consistent with similar LHC measurements in the overlapping p<inf>T</inf> intervals, and cover the kinematic region down to p<inf>T</inf> = 1.5 GeV/c at midrapidity, not accessible by other LHC experiments. The suppression of prompt J/ψ in central and semicentral collisions exhibits a decreasing trend towards lower transverse momentum, described within uncertainties by models implementing J/ψ production from recombination of c and c¯ quarks produced independently in different partonic scatterings. At high transverse momentum, transport models including quarkonium dissociation are able to describe the suppression for prompt J/ψ. For non-prompt J/ψ, the suppression predicted by models including both collisional and radiative processes for the computation of the beauty-quark energy loss inside the quark-gluon plasma is consistent with measurements within uncertainties.

Item Type: Article
Uncontrolled Keywords: Heavy Ion Experiments, Heavy Quark Production, Quarkonium
Depositing User: Symplectic Admin
Date Deposited: 13 Aug 2024 14:48
Last Modified: 23 May 2026 08:26
DOI: 10.1007/JHEP02(2024)066
Open Access URL: https://doi.org/10.1007/JHEP02(2024)066
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3183698
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