2006/12/31 by O. Linnyk, Elena Bratkovskaya, E. L. Bratkovskaya +3 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2007.01.090
published as Nucl.Phys.A786:183-200,2007 · 22 pages, 10 figures. v2: comments added according to referee suggestions; references updated; Nucl. Phys. A, in press
arxiv created 2007/01/23 · openalex publication_date 2007/02/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Charmonium production and suppression in In+In and Pb+Pb reactions at SPS energies is investigated with the HSD transport approach within the 'hadronic comover model' as well as the 'QGP threshold scenario'. The results of the transport calculations for J/Psi suppression and the Psi prime to J/Psi ratio are compared with the recent data of the NA50 and NA60 Collaborations. We find that the comover absorption model - with a single parameter |M0|2 for the matrix element squared for charmonium-meson dissociation - performs best with respect to all data sets. The 'threshold scenario' - within different assumptions for the melting energy densities - yields a reasonable suppression for J/Psi but fails in reproducing the Psi prime to J/Psi ratio for Pb+Pb at 158 A GeV. Predictions for Au+Au reactions are presented for a bombarding energy of 25 A GeV in the different scenarios which will allow for a clear distinction between the models from the experimental side at the future FAIR facility.