dorsal/arxiv
View SchemaExtracting the equation of state from a microscopic non-equilibrium model
| Authors | C. Spieles, A. Dumitru, S. A. Bass, M. Bleicher, J. Brachmann, M. Brandstetter, C. Ernst, L. Gerland, J. Konopka, S. Soff, H. Weber, L. A. Winckelmann, J. Maruhn, H. Stoecker, W. Greiner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9606030 |
| URL | https://arxiv.org/abs/nucl-th/9606030 |
Abstract
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 $T^4$ 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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"date_created": "2026-03-02T18:00:18.643000Z",
"date_modified": "2026-03-02T18:00:18.643000Z",
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"abstract": "We study the thermodynamic properties of infinite nuclear matter with the\nUltrarelativistic Quantum Molecular Dynamics (URQMD), a semiclassical transport\nmodel, running in a box with periodic boundary conditions. It appears that the\nenergy density rises faster than $T^4$ at high temperatures of $T\\approx\n200-300$~MeV. This indicates an increase in the number of degrees of freedom.\nMoreover, We have calculated direct photon production in Pb+Pb collisions at\n160~GeV/u within this model. The direct photon slope from the microscopic\ncalculation equals that from a hydrodynamical calculation without a phase\ntransition in the equation of state of the photon source.",
"arxiv_id": "nucl-th/9606030",
"authors": [
"C. Spieles",
"A. Dumitru",
"S. A. Bass",
"M. Bleicher",
"J. Brachmann",
"M. Brandstetter",
"C. Ernst",
"L. Gerland",
"J. Konopka",
"S. Soff",
"H. Weber",
"L. A. Winckelmann",
"J. Maruhn",
"H. Stoecker",
"W. Greiner"
],
"categories": [
"nucl-th"
],
"title": "Extracting the equation of state from a microscopic non-equilibrium model",
"url": "https://arxiv.org/abs/nucl-th/9606030"
},
"schema_id": "dorsal/arxiv",
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"type": "Model",
"variant": "snapshot-2026-03-01",
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