“…Gluon production [29,30,31,32,33,34] and quark pair production [36,37] have been computed numerically previously to leading order in the coupling and to all orders in the source density. There are strong hints that a deeper understanding of thermalization requires an analysis incorporating energy loss effects [61,62,63]. These may include the scattering contributions of the bottom-up scenario [64,65], or equivalently the energy loss induced by collective effects [66,67,68].…”