Parton Energy Loss in Two-Stream Plasma System

TL;DR

This paper develops a formulation for parton energy loss in unstable two-stream quark-gluon plasmas, revealing strong time and directional dependencies, and reproduces known results in equilibrium conditions.

Contribution

It introduces a novel initial value problem approach to analyze energy loss in unstable plasmas, specifically addressing two-stream systems with chromoelectric instabilities.

Findings

Energy loss strongly depends on time and direction in two-stream plasma.

The method reproduces equilibrium plasma energy loss results.

Unstable plasma features significantly affect parton energy dissipation.

Abstract

The energy loss of a fast parton scattering elastically in a weakly coupled quark-gluon plasma is formulated as an initial value problem. The approach is designed to study an unstable plasma, but it also reproduces the well known result of energy loss in an equilibrium plasma. A two-stream system, which is unstable due to longitudinal chromoelectric modes, is discussed here some detail. In particular, a strong time and directional dependence of the energy loss is demonstrated.