Factorization of Soft and Collinear Divergences in Non-Equilibrium Quantum Field Theory

Abstract

Proof of factorization of soft and collinear divergences in non-equilibrium QCD may be necessary to study hadronic signatures of quark-gluon plasma at RHIC and LHC. In this paper we prove factorization of soft and collinear divergences in non-equilibrium QED by using Schwinger-Keldysh closed-time path integral formalism in the background field method in pure gauge.

Comments: 11 pages latex, Annals of Physics (accepted for publication)