dorsal/arxiv
View SchemaJ/Psi Absorption Scenarios in Nuclear Collisions
| Authors | J. Geiss, E. Bratkovskaya, W. Cassing, C. Greiner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9810059 |
| URL | https://arxiv.org/abs/nucl-th/9810059 |
Abstract
We study the production of $c \bar{c}$ pairs and dimuons from hard collisions in nuclear reactions within the covariant transport approach HSD. Adopting 6 mb for the $c \bar{c}$-baryon cross section the data on $J/\Psi$ suppression in p + A reactions are reproduced in line with calculations based on the Glauber model. Furthermore, using $J/\Psi$ absorption cross sections with mesons above the $D\bar{D}$ threshold in the order of 1.5 - 3 mb we find that all data on $J/\Psi$ suppression from NA38/NA50 can be described without assuming the formation of a quark-gluon plasma. Alternatively, we also investigate an 'early'-comover absorption scenario where the $c \bar{c}$ pairs are dissociated in the color electric fields of neighboring strings. Again we find good agreement with the experimental data with an estimate for the string radius of $R_s \approx 0.2-0.25 fm$.
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"abstract": "We study the production of $c \\bar{c}$ pairs and dimuons from hard collisions\nin nuclear reactions within the covariant transport approach HSD. Adopting 6 mb\nfor the $c \\bar{c}$-baryon cross section the data on $J/\\Psi$ suppression in p\n+ A reactions are reproduced in line with calculations based on the Glauber\nmodel. Furthermore, using $J/\\Psi$ absorption cross sections with mesons above\nthe $D\\bar{D}$ threshold in the order of 1.5 - 3 mb we find that all data on\n$J/\\Psi$ suppression from NA38/NA50 can be described without assuming the\nformation of a quark-gluon plasma. Alternatively, we also investigate an\n\u0027early\u0027-comover absorption scenario where the $c \\bar{c}$ pairs are dissociated\nin the color electric fields of neighboring strings. Again we find good\nagreement with the experimental data with an estimate for the string radius of\n$R_s \\approx 0.2-0.25 fm$.",
"arxiv_id": "nucl-th/9810059",
"authors": [
"J. Geiss",
"E. Bratkovskaya",
"W. Cassing",
"C. Greiner"
],
"categories": [
"nucl-th"
],
"title": "J/Psi Absorption Scenarios in Nuclear Collisions",
"url": "https://arxiv.org/abs/nucl-th/9810059"
},
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