Collinear Photon Emission from the Quark-Gluon Plasma: The Light-Cone Path Integral Formulation

Abstract

We give a simple physical derivation of the photon emission rate from the weakly coupled quark-gluon plasma connected with the collinear processes $q\to \gamma q$ and $q\bar{q}\to \gamma$. The analysis is based on the light-cone path integral approach to the induced radiation. Our results agree with that by Arnold, Moore and Yaffe obtained using the real-time thermal perturbation theory. It is demonstrated that the solution of the AMY integral equation is nothing but the time-integrated Green's function of the light-cone path integral approach written in the momentum representation.

12 pages, 2 figures

Cited by in corpus (6)

• Finite-size effects on the radiative energy loss of a fast parton in hot and dense strongly interacting matter
• Effect of magnetic field on the photon radiation from quark-gluon plasma in heavy ion collisions
• Anomalous mass dependence of radiative quark energy loss in a finite-size quark-gluon plasma
• Failure of the collinear expansion in calculation of the induced gluon emission
• Synchrotron contribution to photon emission from quark-gluon plasma
• Phenomenology of collinear photon emission from quark-gluon plasma in $AA$ collisions