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 th
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.
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Metadaten
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
URN:urn:nbn:de:hebis:30-7114
Document Type:Preprint
Language:English
Date of Publication (online):2005/04/14
Year of first Publication:2001
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/04/14
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):License Logo Veröffentlichungsvertrag für Publikationen

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