Hard photon production rate of a quark-gluon plasma at finite quark   chemical potential
  We compute the photon production rate of a quark-gluon plasma (QGP) at finite quark chemical potential $\mu $ using the Braaten-Pisarski method, thus continuing the work of Kapusta, Lichard, and Seibert who did the calculation for $\mu =0$. 
C.T. Traxler, H. Vija, and M.H. Thoma