Jet quenching in thin plasmas

TL;DR

This paper studies how quarks and gluons lose energy in thin quark-gluon plasmas, focusing on the angular distribution of soft gluon radiation and the interference effects affecting energy loss calculations.

Contribution

It provides a detailed calculation of soft gluon bremsstrahlung in finite plasmas, highlighting the impact of interference effects on jet quenching phenomena.

Findings

Interference modifies classical cascade results.

Angular distribution of soft gluons is characterized.

Energy loss depends on rescattering processes.

Abstract

We investigate the energy loss of quarks and gluons produced in hard processes resulting from final state rescatterings in a finite quark-gluon plasma. The angular distribution of the soft gluon bremsstrahlung induced by n_s=1 rescatterings in the plasma is computed in the Gyulassy-Wang model. Special focus is on how the interference between the initial hard radiation amplitude, the multiple induced Gunion-Bertsch radiation amplitudes, and gluon rescattering amplitudes modifies the classical parton cascade results.