Abstract
The phenomenological analysis and interpretation of experimental data from RHIC and LHC on the production of J/ψ and D mesons in heavy-ion collisions are performed within the two-component HYDJET++ model including the thermal and hard mechanisms of hadron production. It is shown that the thermal freeze-out of charmed mesons at RHIC energies occurs earlier than the thermal freeze-out of light hadrons (assumingly, simultaneously with chemical freeze-out), which indicates that J/ψ and D mesons are not in kinetic equilibrium with the formed hadronic matter. At the same time, a significant part of D mesons at LHC energies are in kinetic equilibrium with the formed thermalized matter, but J/ψ mesons are still characterized by early freeze-out.
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Original Russian Text © I.P. Lokhtin, A.V. Belyaev, G. Ponimatkin, E.Yu. Pronina, G.Kh. Eiyubova, 2017, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 151, No. 2, pp. 285–292.
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Lokhtin, I.P., Belyaev, A.V., Ponimatkin, G. et al. On the possibility of thermalization of heavy mesons in ultrarelativistic nuclear collisions. J. Exp. Theor. Phys. 124, 244–250 (2017). https://doi.org/10.1134/S1063776117010149
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DOI: https://doi.org/10.1134/S1063776117010149