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VOLUME 85 | ISSUE 3 | PAGE 181
Collinear photon emission from the quark-gluon plasma: the light-cone path integral formulation
P. Aurenche, B. G. Zakharov+
LAPTH, Université de Savoie, CNRS, B.P. 110, F-74941 Annecy-le-Vieux Cedex, France
+L.D. Landau Institute for Theoretical Physics RAS, GSP-1, 117334 Moscow, Russia


PACS: 12.38.-t
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\rightarrow \gamma q and q\bar{q}\rightarrow \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 (AMY) 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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