Kronecker delta energy terms in thermal field theory

Abstract

We discuss, using the imaginary time method, some aspects of the connection between the Ward identity, the non-analyticity of amplitudes and the causality relation in QED at finite temperature.

9 pages

References in corpus (2)

• Finite Temperature Perturbation Theory and Large Gauge Invariance
• Effective Actions for 0+1 Dimensional Scalar QED and its SUSY Generalization at $T\ne 0$