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arXiv · 2605.29479

Charmonium production at SPS and FAIR energies

Taesoo Song·Jiaxing Zhao·Joerg Aichelin·Elena Bratkovskaya
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Abstract

In this study we apply the Remler formalism to charmonium production at SPS and GSI/FAIR energies in order to investigate the effects of baryon-rich matter on charmonium production and dissociation in heavy-ion collisions within the Parton-Hadron-String Dynamics (PHSD). As a first step the Remler formalism is tested in p+p collisions and then applied to p+A collisions in order to extract the nuclear absorption cross section of charmonium, which is then utilized in heavy-ion collisions. We find that the Remler formalism successfully describes charmonium production in heavy-ion collisions at SPS energies when an in-medium heavy quark potential is implemented, in which $J/\psi$ dissociates near $T_c$. Finally the same formalism is applied to the low CERN/SPS energy and GSI/FAIR energies, where we estimate charmonium production.

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Taesoo Song, Jiaxing Zhao, Joerg Aichelin, Elena Bratkovskaya. 2026-05-28. Charmonium production at SPS and FAIR energies. https://arxiv.org/abs/2605.29479

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