Early thermalization of quark-gluon matter initially created in high-energy nucleus-nucleus collisions

TL;DR

This paper demonstrates that both gluon and quark matter created in high-energy nucleus-nucleus collisions undergo early thermalization, with gluon matter thermalizing faster, through solving transport equations including elastic scattering.

Contribution

It introduces a method to include elastic parton scattering in transport equations and shows early thermalization of quark-gluon matter with different thermalization times.

Findings

Gluon matter thermalizes faster than quark matter.

Transport equations with elastic scattering can produce thermal states.

Both gluon and quark matter exhibit early thermalization.

Abstract

Elastic parton-parton-parton scattering is briefly reviewed and is included in transport equations of quark-gluon matter. We solve the transport equations and get thermal states from initially produced quark-gluon matter. Both gluon matter and quark matter take early thermalization, but gloun matter has a shorter thermalization time than quark matter.