Leading order, next-to-leading order, and nonperturbative parton collision kernels: Effects in static and evolving media
Rouzbeh Modarresi Yazdi, Shuzhe Shi, Charles Gale, Sangyong Jeon
Abstract
Energetic partons traveling in a strongly interacting medium lose energy by emitting radiation and through collisions with medium constituents. Nonperturbative, next-to-leading-order and leading-order collision kernels are implemented within AMY-McGill formalism. The resulting gluon emission rates are then evaluated and compared by considering scattering occurring in a brick of quark-gluon plasma, as well as in a realistic simulation of $\mathrm{Pb}+\mathrm{Pb}$ collisions at $\sqrt{s}=2.76$ ATeV using martini. We find that the variations in quenching of hard partons resulting from using different kernels can be important, depending on the overall value of the strong-coupling constant ${\ensuremath{\alpha}}_{\mathrm{s}}$.