Computing Spectral Densities in Finite Temperature Field Theory
High Energy Physics - Phenomenology
2009-10-22 v1
Abstract
Convenient Cutkosky-like diagrammatic rules for computing the spectral densities of arbitrary two-point correlation functions in finite temperature field theory are derived. The approach is based on an explicit analytic continuation of imaginary-time Feynman diagrams and avoids the complications of real-time finite temperature perturbation theory. The application of this method to the perturbative evaluation of transport coefficients is briefly discussed.
Cite
@article{arxiv.hep-ph/9210227,
title = {Computing Spectral Densities in Finite Temperature Field Theory},
author = {Sangyong Jeon},
journal= {arXiv preprint arXiv:hep-ph/9210227},
year = {2009}
}
Comments
51 pages, in latex using revtex macros, 12 figures in postscript, appended. UW/PT-92-03