Heavy quark diffusion in an overoccupied gluon plasma
We extract the heavy quark diffusion coefficient k and the resulting momentum broadening h p2i of a heavy quark embedded in a far-from-equilibrium gluon plasma using classical-statistical lattice simulations. We find several features in the time dependence of the momentum broadening: a short initial rapid growth of h p2i, followed by linear growth with time due to Langevin-type dynamics and damped