Dynamical screening away from equilibrium: hard photon production and collisional energy loss

Abstract

We investigate the production rate for hard real photons and the collisional energy loss in the quark-gluon plasma away from chemical equilibrium. Applying the Hard-Thermal-Loop resummation scheme away from equilibrium, we can show that Landau damping provides dynamical screening for both fermion and boson exchange present in the two quantities.

Comments: 5 pages RevTeX, 2 figures, remarks for clarification and one reference added, typos corrected