Photon Production from a Quark-Gluon-Plasma at Finite Baryon Chemical Potential

TL;DR

This paper calculates photon production rates from a quark-gluon plasma at finite baryon chemical potential, extending previous zero chemical potential models by including chemical potential effects and resumming relevant diagrams.

Contribution

It introduces a leading-order calculation of photon production in a QCD plasma with finite chemical potential, incorporating the LPM effect with a new resummation approach.

Findings

Photon production increases with chemical potential.

Resummation of diagrams captures LPM effect at finite chemical potential.

Provides a framework for more accurate photon emission predictions in baryon-rich plasmas.

Abstract

We compute the photon production of a QCD plasma at leading order in the strong coupling with a finite baryon chemical potential. Our approach starts from the real time formalism of finite temperature field theory. We identify the class of diagrams contributing at leading order when a finite chemical potential is added and resum them to perform a full treatment of the LPM effect similar to the one performed by Arnold, Moore, and Yaffe at zero chemical potential. Our results show that the contribution of $2\mapsto 3$ and $3\mapsto 2$ processes grows as the chemical potential grows.