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

P. Aurenche·B. G. Zakharov
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Abstract

We give a simple physical derivation of the photon emission rate from the weakly coupled quark-gluon plasma connected with the collinear processes $q\to γq$ and $q\bar{q}\to γ$. 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.

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P. Aurenche, B. G. Zakharov. 2006-12-27. Collinear Photon Emission from the Quark-Gluon Plasma: The Light-Cone Path Integral Formulation. https://doi.org/10.1134/s0021364007030046

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