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→γq and q¯q→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 (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.
Citation:
P. Aurenche, B. G. Zakharov, “Collinear photon emission from the quark-gluon plasma: the light-cone path integral formulation”, Pis'ma v Zh. Èksper. Teoret. Fiz., 85:3 (2007), 181–187; JETP Letters, 85:3 (2007), 149–155