Radiative energy loss and radiative p_T-broadening of high-energy partons in QCD matter

TL;DR

This paper reviews how high-energy partons lose energy and experience transverse momentum broadening in QCD matter, highlighting the role of radiative corrections and gluon radiation effects on jet quenching.

Contribution

It provides a self-contained analysis of radiative p_T-broadening and energy loss, emphasizing the double logarithmic corrections to the jet quenching parameter qhat.

Findings

Double logarithmic correction to p_T^2 due to gluon radiation

Radiative correction to the jet quenching parameter qhat

Confirmation through calculations of two-gluon radiation energy loss

Abstract

I give a self-contained review on radiative p_T-broadening and radiative energy loss of high-energy partons in QCD matter. The typical p_T^2 of high-energy partons receives a double logarithmic correction due to the recoiling effect of medium-induced gluon radiation. Such a double logarithmic term, averaged over the path length of the partons, can be taken as the radiative correction to the jet quenching parameter qhat and hence contributes to radiative energy loss. This has also been confirmed by detailed calculations of energy loss by radiating two gluons.