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Charmonium production at energies available at the CERN Super Proton Synchrotron and Facility for Antiproton and Ion Research

Taesoo Song1,*, Jiaxing Zhao2,3,†, Joerg Aichelin4,5,‡, and Elena Bratkovskaya1,2,3,§

  • *Contact author: t.song@gsi.de
  • †Contact author: jzhao@itp.uni-frankfurt.de
  • ‡Contact author: aichelin@subatech.in2p3.fr
  • §Contact author: E.Bratkovskaya@gsi.de
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Phys. Rev. C 114, 054903 – Published 3 November, 2026

DOI: https://doi.org/10.1103/l95r-wy1x

Abstract

In this study we apply the Remler formalism to charmonium production at Super Proton Synchrotron (SPS) and GSI/Facility for Antiproton and Ion Research (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. 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/ψ dissociates near Tc. 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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Phys. Rev. C 114, 054903– Published 3 November, 2026
  • Received 2 June 2026
  • Revised 20 August 2026
  • Accepted 7 October 2026
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