Charm coalescence at relativistic energies

The J/psi yield at midrapidity at the top RHIC (relativistic heavy ion collider) energy is calculated within the statistical coalescence model, which assumes charmonium formation at the late stage of the reaction from th
The J/psi yield at midrapidity at the top RHIC (relativistic heavy ion collider) energy is calculated within the statistical coalescence model, which assumes charmonium formation at the late stage of the reaction from the charm quarks and antiquarks created earlier in hard parton collisions. The results are compared to the new PHENIX data and to predictions of the standard models, which assume formation of charmonia exclusively at the initial stage of the reaction and their subsequent suppression. Two versions of the suppression scenario are considered. One of them assumes gradual charmonium suppression by comovers, while the other one supposes that the suppression sets in abruptly due to quark-gluon plasma formation. Surprisingly, both versions give very similar results. In contrast, the statistical coalescence model predicts a few times larger J/psi yield in the most central collisions.
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Metadaten
Author:Andriy P. Kostyuk, Mark I. Gorenstein, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-21018
Document Type:Preprint
Language:English
Date of Publication (online):2005/11/14
Year of first Publication:2003
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/11/14
Tag:J/psi yield ; quark; relativistic heavy ion collider
Note:
Version 1 ersch. u.d.T.: Charm coalescence at RHIC
Source:Phys.Rev.C68:041902,2003. [hep-ph/0305277]
HeBIS PPN:189011939
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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