dorsal/arxiv
View SchemaHydrodynamical Description of 200 A GeV/c S+Au Collisions: Hadron and Electromagnetic Spectra
| Authors | Josef Sollfrank, Pasi Huovinen, Markku Kataja, P. V. Ruuskanen, Madappa Prakash, Raju Venugopalan |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9607029 |
| URL | https://arxiv.org/abs/nucl-th/9607029 |
| DOI | 10.1103/PhysRevC.55.392 |
| Journal | Phys.Rev.C55:392-410,1997 |
Abstract
We study relativistic S+Au collisions at 200 A GeV/c using a hydrodynamical approach. We test various equations of state (EOSs), which are used to describe the strongly interacting matter at densities attainable in the CERN-SPS heavy ion experiments. For each EOS, suitable initial conditions can be determined to reproduce the experimental hadron spectra; this emphasizes the ambiguity between the initial conditions and the EOS in such an approach. Simultaneously, we calculate the resulting thermal photon and dielectron spectra, and compare with experiments. If one allows the excitation of resonance states with increasing temperature, the electro-magnetic signals from scenarios with and without phase transition are very similar and are not resolvable within the current experimental resolution. With regard to the CERES dilepton data, none of the EOSs considered, in conjunction with the standard leading order dilepton rates, succeed in reproducing the observed excess of dileptons below the rho peak. Our work, however, suggests that an improved measurement of the photon and dilepton spectra has the potential to strongly constrain the EOS.
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"abstract": "We study relativistic S+Au collisions at 200 A GeV/c using a hydrodynamical\napproach. We test various equations of state (EOSs), which are used to describe\nthe strongly interacting matter at densities attainable in the CERN-SPS heavy\nion experiments. For each EOS, suitable initial conditions can be determined to\nreproduce the experimental hadron spectra; this emphasizes the ambiguity\nbetween the initial conditions and the EOS in such an approach. Simultaneously,\nwe calculate the resulting thermal photon and dielectron spectra, and compare\nwith experiments. If one allows the excitation of resonance states with\nincreasing temperature, the electro-magnetic signals from scenarios with and\nwithout phase transition are very similar and are not resolvable within the\ncurrent experimental resolution. With regard to the CERES dilepton data, none\nof the EOSs considered, in conjunction with the standard leading order dilepton\nrates, succeed in reproducing the observed excess of dileptons below the rho\npeak. Our work, however, suggests that an improved measurement of the photon\nand dilepton spectra has the potential to strongly constrain the EOS.",
"arxiv_id": "nucl-th/9607029",
"authors": [
"Josef Sollfrank",
"Pasi Huovinen",
"Markku Kataja",
"P. V. Ruuskanen",
"Madappa Prakash",
"Raju Venugopalan"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.55.392",
"journal_ref": "Phys.Rev.C55:392-410,1997",
"title": "Hydrodynamical Description of 200 A GeV/c S+Au Collisions: Hadron and Electromagnetic Spectra",
"url": "https://arxiv.org/abs/nucl-th/9607029"
},
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