Initial conditions for hydrodynamics from weakly coupled pre-equilibrium   evolution
  We use effective kinetic theory, accurate at weak coupling, to simulate the pre-equilibrium evolution of transverse energy and flow perturbations in heavy-ion collisions. We provide a Green function which propagates the initial perturbations to the energy-momentum tensor at a time when hydrodynamics becomes applicable. With this map, the complete pre-thermal evolution from saturated nuclei to hydrodynamics can be modelled in a perturbatively controlled way. 
Liam Keegan, Aleksi Kurkela, Aleksas Mazeliauskas and Derek Teaney
hep-ph nucl-th