Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1992-10-10
Phys.Rev. D47 (1993) 4586-4607
Physics
High Energy Physics
High Energy Physics - Phenomenology
51 pages, in latex using revtex macros, 12 figures in postscript, appended. UW/PT-92-03
Scientific paper
10.1103/PhysRevD.47.4586
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.
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