Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at sNN = 5.02 TeV.
In: Journal of High Energy Physics, Jg. 2024 (2024-02-01), Heft 2, S. 1-40
Online
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Zugriff:
The transverse momentum (p T ) and centrality dependence of the nuclear modification factor R AA 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 NN = 5.02 TeV. The measurements are carried out through the e + e − decay channel at midrapidity (|y| < 0.9) in the transverse momentum region 1.5 < p T < 10 GeV/c. Both prompt and non-prompt J/ψ measurements indicate a significant suppression for p T > 5 GeV/c, which becomes stronger with increasing collision centrality. The results are consistent with similar LHC measurements in the overlapping p T intervals, and cover the kinematic region down to p T = 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. [ABSTRACT FROM AUTHOR]
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Titel: |
Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at sNN = 5.02 TeV.
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Autor/in / Beteiligte Person: | Acharya, S. ; Adamová, D. ; Aglieri Rinella, G. ; Agnello, M. ; Agrawal, N. ; Ahammed, Z. ; Ahmad, S. ; Ahn, S. U. ; Ahuja, I. ; Akindinov, A. ; Al-Turany, M. ; Aleksandrov, D. ; Alessandro, B. ; Alfanda, H. M. ; Alfaro Molina, R. ; Ali, B. ; Alici, A. ; Alizadehvandchali, N. ; Alkin, A. ; Alme, J. |
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Zeitschrift: | Journal of High Energy Physics, Jg. 2024 (2024-02-01), Heft 2, S. 1-40 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 1126-6708 (print) |
DOI: | 10.1007/JHEP02(2024)066 |
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