Radiative quark $p_T$-broadening in a quark-gluon plasma beyond the soft gluon approximation

TL;DR

This paper investigates how radiative corrections affect the transverse momentum broadening of a fast quark in a quark-gluon plasma, revealing that beyond the soft gluon approximation, these corrections can significantly suppress broadening, contrasting previous predictions of enhancement.

Contribution

It provides a novel analysis of radiative corrections beyond the soft gluon approximation, showing a suppression effect on $p_T$-broadening not captured in earlier models.

Findings

Radiative processes can suppress $p_T$-broadening in a quark-gluon plasma.

Contrasts with previous calculations predicting enhancement.

Highlights importance of going beyond the soft gluon approximation.

Abstract

We study the radiative correction to $p_T$-broadening of a fast quark in a quark-gluon plasma beyond the soft gluon approximation. We find that the radiative processes can suppress considerably $p_T$-broadening. This differs dramatically from previous calculations to logarithmic accuracy in the soft gluon approximation, predicting a considerable enhancement of $p_T$-broadening.