dorsal/arxiv
View SchemaCharmonium chemistry in A+A collisions at relativistic energies
| Authors | E. L. Bratkovskaya, A. P. Kostyuk, W. Cassing, H. Stoecker |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0402042 |
| URL | https://arxiv.org/abs/nucl-th/0402042 |
| DOI | 10.1103/PhysRevC.69.054903 |
| Journal | Phys.Rev. C69 (2004) 054903 |
Abstract
Charmonium production and suppression in heavy-ion collisions at relativistic energies is investigated within different models, i.e. the comover absorption model, the threshold suppression model, the statistical coalescence model and the HSD transport approach. In HSD the charmonium dissociation cross sections with mesons are described by a simple phase-space parametrization including an effective coupling strength $|M_i|^2$ for the charmonium states $i=\chi_c, J/\psi, \psi^\prime$. This allows to include the backward channels for charmonium reproduction by $D \bar{D}$ channels -- which are missed in the comover absorption and threshold suppression model -- employing detailed balance without introducing any new parameters. It is found that all approaches yield a reasonable description of $J/\psi$ suppression in S+U and Pb+Pb collisions at SPS energies. However, they differ significantly in the $\psi^\prime/J/\psi$ ratio versus centrality at SPS and especially at RHIC energies. These pronounced differences can be exploited in future measurements at RHIC to distinguish the hadronic rescattering scenarios from quark coalescence close to the QGP phase boundary.
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"abstract": "Charmonium production and suppression in heavy-ion collisions at relativistic\nenergies is investigated within different models, i.e. the comover absorption\nmodel, the threshold suppression model, the statistical coalescence model and\nthe HSD transport approach. In HSD the charmonium dissociation cross sections\nwith mesons are described by a simple phase-space parametrization including an\neffective coupling strength $|M_i|^2$ for the charmonium states $i=\\chi_c,\nJ/\\psi, \\psi^\\prime$. This allows to include the backward channels for\ncharmonium reproduction by $D \\bar{D}$ channels -- which are missed in the\ncomover absorption and threshold suppression model -- employing detailed\nbalance without introducing any new parameters. It is found that all approaches\nyield a reasonable description of $J/\\psi$ suppression in S+U and Pb+Pb\ncollisions at SPS energies. However, they differ significantly in the\n$\\psi^\\prime/J/\\psi$ ratio versus centrality at SPS and especially at RHIC\nenergies. These pronounced differences can be exploited in future measurements\nat RHIC to distinguish the hadronic rescattering scenarios from quark\ncoalescence close to the QGP phase boundary.",
"arxiv_id": "nucl-th/0402042",
"authors": [
"E. L. Bratkovskaya",
"A. P. Kostyuk",
"W. Cassing",
"H. Stoecker"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.69.054903",
"journal_ref": "Phys.Rev. C69 (2004) 054903",
"title": "Charmonium chemistry in A+A collisions at relativistic energies",
"url": "https://arxiv.org/abs/nucl-th/0402042"
},
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