Measurements of inclusive J/ψ production at midrapidity and forward rapidity in Pb-Pb collisions at √s.sub.NN./sub.=5.02 TeV

0585019 - ÚJF 2025 RIV NL eng J - Journal Article
Acharya, S. - Adamová, Dagmar - Adler, A. - Aglieri Rinella, G. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Herman, T. - Isakov, Artem - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Kushpil, Svetlana - Šafařík, K. - Torres, S. R. - Závada, Petr … Total 1043 authors
Measurements of inclusive J/ψ production at midrapidity and forward rapidity in Pb-Pb collisions at √s_NN=5.02 TeV.
Physics Letters. B. Roč. 849, FEB (2024), č. článku 138451. ISSN 0370-2693. E-ISSN 1873-2445
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion collisions * transverse momentum
OECD category: Nuclear physics; Nuclear physics (FZU-D)
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2024.138451

The measurements of the inclusive J/psi yield at midrapidity (|y| < 0.9) and forward rapidity (2.5 < y < 4) in Pb-Pb collisions at root s(NN) = 5.02 TeV with the ALICE detector at the LHC are reported. The inclusive J/psi production yields and nuclear modification factors, R-AA, are measured as a function of the collision centrality, J/psi transverse momentum (p(T)), and rapidity. The J/psi average transverse momentum and squared transverse momentum ( p(T) and < p(T)(2)>) are evaluated as a function of the centrality at midrapidity. Compared to the previous ALICE publications, here the entire Pb-Pb collisions dataset collected during the LHC Run 2 is used, which improves the precision of the measurements and extends the p(T) coverage. The p(T)-integrated R-AA shows a hint of an increasing trend towards unity from semicentral to central collisions at midrapidity, while it is flat at forward rapidity. The p(T)-differential R-AA shows a strong suppression at high p(T) with less suppression at low p(T) where it reaches a larger value at midrapidity compared to forward rapidity. The ratio of the p(T)-integrated yields of J/psi to those of D-0 mesons is reported for the first time for the central and semicentral event classes at midrapidity. Model calculations implementing charmonium production via the coalescence of charm quarks and antiquarks during the fireball evolution (transport models) or in a statistical approach with thermal weights are in good agreement with the data at low p(T). At higher p(T), the data are well described by transport models and a model based on energy loss in the strongly-interacting medium produced in nuclear collisions at the LHC.
Permanent Link: https://hdl.handle.net/11104/0352785