# Heavy quark dynamics within a Boltzmann transport model: radiative vs collisional energy loss

## TL;DR

This paper models heavy quark propagation in quark-gluon plasma using a relativistic Boltzmann approach, highlighting the dominant role of radiative energy loss at high transverse momentum in explaining experimental observables.

## Contribution

It introduces a transport model that incorporates both collisional and radiative energy loss mechanisms, with a focus on the impact of gluon radiation calculated via a higher-twist scheme.

## Key findings

- Radiative processes dominate energy loss at $p_T > 10$ GeV.
- The model reproduces observed $R_{AA}$ and $v_2$ at high transverse momentum.
- Gluon radiation significantly influences heavy quark suppression and flow.

## Abstract

We discuss the propagation of heavy quarks (charm and bottom) through the QGP by means of a relativistic Boltzmann transport approach including both collisional and radiative energy loss mechanisms. In particular we investigate the impact of induced gluon radiation by dynamical QCD medium implementing in our transport model a formula for the emitted gluon spectrum calculated in a higher-twist scheme. We notice that in the region of high transverse momentum ($p_T > 10$ GeV) radiative processes play an essential role giving a dominant contribution to the generation of $R_{AA}$ and $v_2$ at momentum values for which the energy loss by collisions is in the perturbative regime.