Three-point functions at finite temperature
Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
Received: 7 March 1997, Revised version: 16 May 1997
Abstract
We study 3-point functions at finite temperature in the closed time
path formalism. We give a general decomposition of the eight component
tensor in terms of seven vertex functions. We derive a spectral
representation for these seven functions in terms of two independent
real spectral functions. We derive relationships between the seven
functions and obtain a representation of the vertex tensor that
greatly simplifies calculations in real time.
Copyright Springer-Verlag
