TY  - INPR
A1  - Spieles, Christian
A1  - Vogt, Ramona
A1  - Gerland, Lars
A1  - Bass, Steffen A.
A1  - Bleicher, Marcus
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Modeling J /Psi production and absorption in a microscopic nonequilibrium approach
N2  - Charmonium production and absorption in heavy ion collisions is studied with the Ultrarelativisitic Quantum Molecular Dynamics model. We compare the scenario of universal and time independent color-octet dissociation cross sections with one of distinct color-singlet J/psi, psi 2 and CHIc states, evolving from small, color transparent configurations to their asymptotic sizes. The measured J/psi production cross sections in pA and AB collisions at SPS energies are consistent with both purely hadronic scenarios. The predicted rapidity dependence of J/psi suppression can be used to discriminate between the two experimentally. The importance of interactions with secondary hadrons and the applicability of thermal reaction kinetics to J/psi absorption are in- vestigated. We discuss the e ect of nuclear stopping and the role of leading hadrons. The dependence of the 2/J/psi ratio on the model assumptions and the possible influence of refeeding processes is also studied.
KW  - Charmonium Produktion
KW  - Absorption
KW  - schwere Ion Kollision
KW  - Ultrarelativisitisches
KW  - Dynamik
KW  - Charmonium production
KW  - absorption
KW  - heavy ion collisions
KW  - Ultrarelativisitic Quantum Molecular Dynamics model
Y1  - 1999
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3126
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-22731
ER  -