### Abstract

Using the Schwinger-Keldysh formalism we develop a method for solving self-consistently the Schwinger-Dyson equations for pions and deltas in nuclear medium at nonzero temperature. The vertex corrections are neglected and the nucleon is treated as a mean field. The correct analytic properties of the pions and deltas propagators are assured by using dispersion relations to relate their real and imaginary parts. While the width of the pions spectral function at low momentum increases with increasing temperature, the opposite is true for higher momenta implying that the quasiparticle approximation is a rather good one at high temperature.

Original language | English |
---|---|

Pages (from-to) | 2756-2761 |

Number of pages | 6 |

Journal | Physical Review C - Nuclear Physics |

Volume | 52 |

Issue number | 5 |

DOIs | |

Publication status | Published - 1995 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*52*(5), 2756-2761. https://doi.org/10.1103/PhysRevC.52.2756

**Self-consistent delta-hole model at nonzero temperature.** / Korpa, C.; Malfliet, Rudi.

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 52, no. 5, pp. 2756-2761. https://doi.org/10.1103/PhysRevC.52.2756

}

TY - JOUR

T1 - Self-consistent delta-hole model at nonzero temperature

AU - Korpa, C.

AU - Malfliet, Rudi

PY - 1995

Y1 - 1995

N2 - Using the Schwinger-Keldysh formalism we develop a method for solving self-consistently the Schwinger-Dyson equations for pions and deltas in nuclear medium at nonzero temperature. The vertex corrections are neglected and the nucleon is treated as a mean field. The correct analytic properties of the pions and deltas propagators are assured by using dispersion relations to relate their real and imaginary parts. While the width of the pions spectral function at low momentum increases with increasing temperature, the opposite is true for higher momenta implying that the quasiparticle approximation is a rather good one at high temperature.

AB - Using the Schwinger-Keldysh formalism we develop a method for solving self-consistently the Schwinger-Dyson equations for pions and deltas in nuclear medium at nonzero temperature. The vertex corrections are neglected and the nucleon is treated as a mean field. The correct analytic properties of the pions and deltas propagators are assured by using dispersion relations to relate their real and imaginary parts. While the width of the pions spectral function at low momentum increases with increasing temperature, the opposite is true for higher momenta implying that the quasiparticle approximation is a rather good one at high temperature.

UR - http://www.scopus.com/inward/record.url?scp=21844483187&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=21844483187&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.52.2756

DO - 10.1103/PhysRevC.52.2756

M3 - Article

AN - SCOPUS:21844483187

VL - 52

SP - 2756

EP - 2761

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

ER -