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

TL;DR

This paper proves the factorization of soft and collinear divergences in non-equilibrium QED using the Schwinger-Keldysh formalism, which is essential for analyzing hadronic signatures in quark-gluon plasma experiments.

Contribution

It introduces a proof of divergence factorization in non-equilibrium QED employing the Schwinger-Keldysh formalism within the background field method.

Findings

Established factorization in non-equilibrium QED

Utilized Schwinger-Keldysh closed-time path integral formalism

Applied background field method in pure gauge

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.