Extracting the equation of state from a microscopic non-equilibrium model

We study the thermodynamic properties of infinite nuclear matter with the Ultrarelativistic Quantum Molecular Dynamics (URQMD), a semiclassical transport model, running in a box with periodic boundary conditions. It appe
We study the thermodynamic properties of infinite nuclear matter with the Ultrarelativistic Quantum Molecular Dynamics (URQMD), a semiclassical transport model, running in a box with periodic boundary conditions. It appears that the energy density rises faster than T4 at high temperatures of T approx. 200 - 300 MeV. This indicates an increase in the number of degrees of freedom. Moreover, We have calculated direct photon production in Pb+Pb collisions at 160 GeV/u within this model. The direct photon slope from the microscopic calculation equals that from a hydrodynamical calculation without a phase transition in the equation of state of the photon source.
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Metadaten
Author:Christian Spieles, Adrian Dumitru, Steffen A. Bass, Marcus Bleicher, Jörg Brachmann, Mathias Brandstetter, Christoph Ernst, Lars Gerland, Jens Konopka, Sven Soff, Henning Weber, L. A. Winckelmann, Joachim A. Maruhn, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-7037
Document Type:Preprint
Language:English
Date of Publication (online):2005/04/14
Year of first Publication:1996
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/04/14
Source:http://de.arxiv.org/abs/nucl-th/9606030 , Proceedings of the XIV International Conference on Particles and Nuclei (PANIC'96), 22-28 May 1996, Williamsburg, Virginia, USA, to be published by World Scientific Publ. Co.
HeBIS PPN:128787090
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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