Direct photon production from viscous quark-gluon plasma

A. K. Chaudhuri, Bikash Sinha
2011 Physical Review C  
We simulate direct photon production in evolution of viscous QGP medium. Photons from Compton and annihilation processes are considered. Viscous effect on photon production is very strong and reliable simulation is possible only in a limited p_T range. For minimally viscous fluid η/s=0.08), direct photons can be reliably computed only up to p_T ≤ 1.3 GeV. With reduced viscosity (η/s=0.04), the limit increases to p_T ≤ 2GeV.
doi:10.1103/physrevc.83.034905 fatcat:eonq5mcgkzd4rb7sga4lxpj2j4