Direct photon production from viscous QGP

Understand

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 $\eta/s$=0.08), direct photons can be reliably computed only up to $p_T \leq$ 1.3 GeV.