Hard gluon evolution in warming medium

Abstract

We describe the energy distribution of hard gluons travelling through a dense quark-gluon plasma whose temperature increases linearly with time, within a probabilistic perturbative approach. The results were applied to the thermalization problem in heavy ion collisions, in the third stage of the bottom-up picture, to estimate the entropy density and average temperature of the soft thermal bath, as the system approaches (local) thermal equilibrium.

Hard gluon evolution in the last stage of the bottom-up thermalization

“…However, it is estimated that the final temperature is larger than the initial one only by a factor of α −1/10 s . We will include the effect of the temperature evolution in a future work [20].…”