Dissociation rates of J / psi's with comoving mesons : thermal versus nonequilibrium scenario.
- We study J/psi dissociation processes in hadronic environments. The validity of a thermal meson gas ansatz is tested by confronting it with an alternative, nonequilibrium scenario. Heavy ion collisions are simulated in the frame- work of the microscopic transport model UrQMD, taking into account the production of charmonium states through hard parton-parton interactions and subsequent rescattering with hadrons. The thermal gas and microscopic transport scenarios are shown to be very dissimilar. Estimates of J/psi survival probabilities based on thermal models of comover interactions in heavy ion collisions are therefore not reliable.
| Author: | Christian Spieles, Ramona VogtORCiD, Lars GerlandGND, Steffen A. BassORCiDGND, Marcus BleicherORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND |
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| URN: | urn:nbn:de:hebis:30-22925 |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 2005/12/08 |
| Year of first Publication: | 1998 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2005/12/08 |
| Tag: | Kollisionen schwerer Ionen; Meson; Molekulare Dynamik; UrQMD; ultrarelativistisch Meson; Ultrarelativistic Quantum Molecular Dynamics; UrQMD; heavy ion collisions |
| Source: | Report-no: LBNL-42280 ; Journal-ref: J.Phys. G25 (1999) 2351-2359 ; http://www.arxiv.org/abs/hep-ph/9809441 |
| HeBIS-PPN: | 185382894 |
| Institutes: | Physik / Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  Deutsches Urheberrecht |
