Modeling J /Psi production and absorption in a microscopic nonequilibrium approach
- 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.
Verfasserangaben: | Christian Spieles, Ramona VogtORCiD, Lars GerlandGND, Steffen A. BassORCiDGND, Marcus BleicherORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND |
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URN: | urn:nbn:de:hebis:30-22731 |
ArXiv-Id: | http://arxiv.org/abs/hep-ph/9902337 |
Dokumentart: | Preprint |
Sprache: | Englisch |
Datum der Veröffentlichung (online): | 05.12.2005 |
Jahr der Erstveröffentlichung: | 1999 |
Veröffentlichende Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Datum der Freischaltung: | 05.12.2005 |
Freies Schlagwort / Tag: | Absorption; Charmonium Produktion; Dynamik; Ultrarelativisitisches; schwere Ion Kollision Charmonium production; Ultrarelativisitic Quantum Molecular Dynamics model; absorption; heavy ion collisions |
Quelle: | Phys.Rev.C60:054901,1999. [hep-ph/9902337] |
HeBIS-PPN: | 185402968 |
Institute: | Physik / Physik |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Lizenz (Deutsch): | Deutsches Urheberrecht |