$\gamma$-Radiation of thermalized Quark-Gluon-Plasma
  Long time ago, photon production was proposed as a probe and a thermometer for Quark-Gluon Plasma (QGP). However, only recently has the complete $\alpha_s$ order photon spectrum been obtained. In this paper we give a brief review of the problematic as well as discuss the ${\cal O}(\alpha_s)$ result. 
Haitham Zaraket (University of Winnipeg)