Chemical freeze-out parameters at RHIC from microscopic model calculations
The relaxation of hot nuclear matter to an equilibrated state in the central zone of heavy-ion collisions at energies from AGS to RHIC is studied within the microscopic UrQMD model. It is found that the system reaches the (quasi)equilibrium stage for the period of 10-15 fm/c. Within this time the matter in the cell expands nearly isentropically with the entropy to baryon ratio S/A = 150 - 170. Thermodynamic characteristics of the system at AGS and at SPS energies at the endpoints of this stage are very close to the parameters of chemical and thermal freeze-out extracted from the thermal fit to experimental data. Predictions are made for the full RHIC energy square root s = 200$ AGeV. The formation of a resonance-rich state at RHIC energies is discussed.
| Author: | Larissa V. Bravina, Eugene E. Zabrodin, Steffen A. Bass, Amand Faessler, Christian Fuchs, Mark I. Gorenstein, Walter Greiner, Sven Soff, Horst Stöcker, Henning Weber |
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| URN: | urn:nbn:de:hebis:30-7114 |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 14.04.2005 |
| Year of first Publication: | 2001 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Source: | http://de.arxiv.org/abs/nucl-th/0104023 , Talk at the conference Quark Matter'2001, 4 pages, to appear in Nucl. Phys. A |
| HeBIS PPN: | 128802073 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
