Scattering amplitude and shift in self-energy in medium

DOI10.1007/S100520200909zbMATH Open1099.81559arXivhep-th/0108139OpenAlexW3106473066MaRDI QIDQ1348903

V. Pereyra

Publication date: 20 May 2002

Published in: The European Physical Journal C. Particles and Fields (Search for Journal in Brave)

Abstract: Two simple proofs are presented for the first order virial expansion of the self-energy of a particle moving through a medium, characterised by temperature and/or chemical potential(s). One is based on the virial expansion of the self-energy operator itself, while the other is on the analysis of its Feynman diagrams in configuration space.

Full work available at URL: https://arxiv.org/abs/hep-th/0108139

zbMATH Keywords

Feynman diagramsfirst order virial expansion

Mathematics Subject Classification ID

(S)-matrix theory, etc. in quantum theory (81U20)

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