TY  - INPR
A1  - Kostyuk, Andriy P.
A1  - Gorenstein, Mark I.
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Charm coalescence at relativistic energies
N2  - 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.
KW  - relativistic heavy ion collider
KW  - J/psi yield
KW  - quark
Y1  - 2003
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3307
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-21018
N1  - Version 1 ersch. u.d.T.: Charm coalescence at RHIC
ER  -