dorsal/arxiv
View SchemaCharmonium dynamics in nucleus-nucleus collisions at SPS and FAIR energies
| Authors | O. Linnyk, E. L. Bratkovskaya, W. Cassing, H. Stoecker |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0612049 |
| URL | https://arxiv.org/abs/nucl-th/0612049 |
| DOI | 10.1016/j.nuclphysa.2007.01.090 |
| Journal | Nucl.Phys.A786:183-200,2007 |
Abstract
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 |M_0|^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.
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"abstract": "Charmonium production and suppression in In+In and Pb+Pb reactions at SPS\nenergies is investigated with the HSD transport approach within the \u0027hadronic\ncomover model\u0027 as well as the \u0027QGP threshold scenario\u0027. The results of the\ntransport calculations for J/Psi suppression and the Psi prime to J/Psi ratio\nare compared with the recent data of the NA50 and NA60 Collaborations. We find\nthat the comover absorption model - with a single parameter |M_0|^2 for the\nmatrix element squared for charmonium-meson dissociation - performs best with\nrespect to all data sets. The \u0027threshold scenario\u0027 - within different\nassumptions for the melting energy densities - yields a reasonable suppression\nfor J/Psi but fails in reproducing the Psi prime to J/Psi ratio for Pb+Pb at\n158 A GeV. Predictions for Au+Au reactions are presented for a bombarding\nenergy of 25 A GeV in the different scenarios which will allow for a clear\ndistinction between the models from the experimental side at the future FAIR\nfacility.",
"arxiv_id": "nucl-th/0612049",
"authors": [
"O. Linnyk",
"E. L. Bratkovskaya",
"W. Cassing",
"H. Stoecker"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/j.nuclphysa.2007.01.090",
"journal_ref": "Nucl.Phys.A786:183-200,2007",
"title": "Charmonium dynamics in nucleus-nucleus collisions at SPS and FAIR energies",
"url": "https://arxiv.org/abs/nucl-th/0612049"
},
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