dorsal/arxiv
View SchemaThermal Properties of a Hot Pion Gas beyond the Quasiparticle Approximation
| Authors | R. Rapp, J. Wambach |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9502023 |
| URL | https://arxiv.org/abs/nucl-th/9502023 |
| DOI | 10.1016/0370-2693(95)00361-N |
| Journal | Phys.Lett. B351 (1995) 50-55 |
Abstract
Within the Matsubara formalism we derive expressions for the pion self-energy and the two-pion propagator in a hot pion gas. These quantities are used to selfconsistently calculate the in-medium $\pi\pi$ amplitude beyond the quasiparticle approximation (QPA). The results are shown to differ significantly from QPA-based calculations. We also examine the impact of chiral constraints on the $\pi\pi$ interaction in a chirally improved version of the J\"ulich $\pi\pi$ model.
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"abstract": "Within the Matsubara formalism we derive expressions for the pion self-energy\nand the two-pion propagator in a hot pion gas. These quantities are used to\nselfconsistently calculate the in-medium $\\pi\\pi$ amplitude beyond the\nquasiparticle approximation (QPA). The results are shown to differ\nsignificantly from QPA-based calculations. We also examine the impact of chiral\nconstraints on the $\\pi\\pi$ interaction in a chirally improved version of the\nJ\\\"ulich $\\pi\\pi$ model.",
"arxiv_id": "nucl-th/9502023",
"authors": [
"R. Rapp",
"J. Wambach"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0370-2693(95)00361-N",
"journal_ref": "Phys.Lett. B351 (1995) 50-55",
"title": "Thermal Properties of a Hot Pion Gas beyond the Quasiparticle Approximation",
"url": "https://arxiv.org/abs/nucl-th/9502023"
},
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