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VOLUME 67 (1998) | ISSUE 1 | PAGE 3
Collective excitations of massive Dirac particles in a hot and dense medium
PACS: 12.38.Mh
The one-loop dispersion relation which defines the collective excitations of massive Dirac particles in a hot and dense quark-gluon medium is obtained in the high-temperature limit for the case m <C gT and is solved explicitly for all |q| when μ = 0. Four well-separated spectrum branches (quasi-particle and quasi-hole excitations) are found, and their behaviors for small and large |q| are investigated. All calculations are performed using the temperature Green function technique and fixing the Feynman gauge. The gauge dependence of the spectra found is briefly discussed.