Investigation of jet quenching and elliptic flow within a pQCD-based partonic transport model

TL;DR

This paper uses the BAMPS partonic transport model to study jet quenching and elliptic flow in heavy ion collisions, highlighting the dominance of radiative processes in gluon energy loss.

Contribution

It provides a detailed comparison of elastic and radiative energy loss mechanisms for high-energy gluons in a pQCD-based transport model.

Findings

Radiative processes dominate gluon energy loss.

Elliptic flow and nuclear modification factor are successfully simulated.

Gunion and Bertsch matrix element effectively models radiative energy loss.

Abstract

The partonic transport model BAMPS (a Boltzmann approach to multiparton scatterings) is employed to investigate different aspects of heavy ion collisions within a common framework based on perturbative QCD. This report focuses on the joint investigation of the collective behavior of the created medium and the energy loss of high-pT gluons traversing this medium. To this end the elliptic flow and the nuclear modification factor of gluons in heavy ion collisions at 200 AGeV are simulated with BAMPS. The mechanism for the energy loss of high energy gluons within BAMPS is studied in detail. For this, purely elastic interactions are compared to radiative processes, gg -> ggg, that are implemented based on the matrix element by Gunion and Bertsch. The latter are found to be the dominant source of energy loss within the framework employed in this work.