Jet quenching with running coupling including radiative and collisional energy losses

TL;DR

This paper models jet quenching at RHIC and LHC by incorporating radiative and collisional energy losses with a running coupling, showing that data can be explained with different plasma compositions and negligible energy gain effects.

Contribution

It introduces a comprehensive calculation of the nuclear modification factor including both radiative and collisional energy losses with a running coupling constant.

Findings

RHIC data explained by both quark-gluon and gluonic plasma scenarios

Energy gain from gluon absorption is negligible

Running coupling affects thermal suppression of energy loss

Abstract

We calculate the nuclear modification factor for RHIC and LHC conditions accounting for the radiative and collisional parton energy loss with the running coupling constant.We find that the RHIC data can be explained both in the scenario with the chemically equilibrium quark-gluon plasma and purely gluonic plasma with slightly different thermal suppression of the coupling constant. The role of the parton energy gain due to gluon absorption is also investigated. Our results show that the energy gain gives negligible effect.