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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 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 Bogdan DumitruORCiDGND, Steffen A. BassORCiDGND, Marcus BleicherORCiDGND, Jörg BrachmannGND, Mathias Brandstetter, Christoph Ernst, Lars GerlandGND, Jens Konopka, Sven SoffORCiD, Henning WeberGND, Luke Andreas WinckelmannGND, Joachim MaruhnORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND
URN:urn:nbn:de:hebis:30-7037
DOI:https://doi.org/10.1142/9789814530231
ISBN:978-9810230036
ISBN:9810230036
ISBN:978-981-4546-64-5
ArXiv Id:http://arxiv.org/abs/nucl-th/9606030
Editor:Carl E. Carlson, John J. Domingo
Document Type:Preprint
Language:English
Year of Completion:1996
Year of first Publication:1996
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/04/14
Page Number:3
First Page:1
Last Page:3
Note:
Erschienen in: Carl E. Carlson ; John J. Domingo (Hrsg.): Particles and Nuclei (PANIC 96) : proceedings of the 14th Particles and Nuclei International Conference ; 14th Particles and Nuclei International Conference, Sigapore : World Scientific, 1997, S. 409-411, ISBN: 978-9810230036, ISBN: 9810230036, ISBN: 978-981-4546-64-5, doi:10.1142/9789814530231
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 / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht