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.

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Author:Larissa BravinaORCiDGND, Eugene E. ZabrodinORCiD, Steffen A. BassORCiDGND, Amand FäßlerGND, Christian FuchsGND, Mark I. GorensteinORCiDGND, Walter GreinerGND, Sven SoffORCiD, Horst StöckerORCiDGND, Henning WeberGND
ArXiv Id:
Document Type:Preprint
Year of Completion:2001
Date of first Publication:2001/04/06
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/04/14
Page Number:4
First Page:1
Last Page:4
Später erschienen in: Nuclear physics. A, Nuclear and hadronic physics, 698.2002, Nr. 1-4, S. 383-386, doi:10.1016/S0375-9474(01)01385-9
Source: , Talk at the conference Quark Matter'2001, 4 pages, to appear in Nucl. Phys. A
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht