Retarded-Advanced N-point Green Functions in thermal field theories
High Energy Physics - Phenomenology
2009-10-22 v1
Abstract
The general relationship between a Retarded-Advanced Green function of the Real Time formalism and analytical continuations of the Imaginary Time Amplitude is obtained via perturbation theory. A 4-point R-A function is, at most, a linear combination of three analytical continuations, and a 5-point R-A function of seven continuations. The R-A functions are written as the sum of one analytical continuation plus discontinuities across single momentum transfer variables. These discontinuities
Keywords
Cite
@article{arxiv.hep-ph/9306210,
title = {Retarded-Advanced N-point Green Functions in thermal field theories},
author = {F. Guerin},
journal= {arXiv preprint arXiv:hep-ph/9306210},
year = {2009}
}