dorsal/arxiv
View SchemaSelfconsistent Description of a Thermal Piongas
| Authors | R. Rapp, J. Wambach |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9306016 |
| URL | https://arxiv.org/abs/nucl-th/9306016 |
| DOI | 10.1016/0370-2693(93)91604-L |
| Journal | Phys.Lett. B315 (1993) 220-225 |
Abstract
We examine a hot pion gas by including medium modifications of the two-body scattering amplitude as well as mean-field effects selfconsistently. In contrast to earlier calculations, the in-medium T-matrix is rather close to the free one while the mean-field potential agrees well with lowest-order estimates. We also discuss the validity of the quasiparticle approximation. It is found that it is reliable for temperatures up to $\sim 150$ MeV. Above this temperature off-shell effects in the pion selfenergy become important, especially if the pions are strongly out of chemical equilibrium.
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"abstract": "We examine a hot pion gas by including medium modifications of the two-body\nscattering amplitude as well as mean-field effects selfconsistently. In\ncontrast to earlier calculations, the in-medium T-matrix is rather close to the\nfree one while the mean-field potential agrees well with lowest-order\nestimates. We also discuss the validity of the quasiparticle approximation. It\nis found that it is reliable for temperatures up to $\\sim 150$ MeV. Above this\ntemperature off-shell effects in the pion selfenergy become important,\nespecially if the pions are strongly out of chemical equilibrium.",
"arxiv_id": "nucl-th/9306016",
"authors": [
"R. Rapp",
"J. Wambach"
],
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"nucl-th"
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"doi": "10.1016/0370-2693(93)91604-L",
"journal_ref": "Phys.Lett. B315 (1993) 220-225",
"title": "Selfconsistent Description of a Thermal Piongas",
"url": "https://arxiv.org/abs/nucl-th/9306016"
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