Heavy quarks at RHIC and LHC within a partonic transport model

TL;DR

This study uses the BAMPS partonic transport model to analyze the production, evolution, and flow of heavy quarks in heavy-ion collisions at RHIC and LHC, including secondary production and medium interactions.

Contribution

It introduces a detailed implementation of heavy quark interactions within BAMPS, including elastic scatterings with running coupling and Debye screening, and compares results to experimental data.

Findings

Heavy quarks undergo significant elastic interactions in the medium.

Secondary heavy quark production contributes notably at LHC energies.

Model results align with experimental measurements of elliptic flow and nuclear modification factor.

Abstract

Production and space-time evolution of heavy quarks in central and non-central heavy-ion collisions at RHIC and LHC are studied with the partonic transport model Boltzmann Approach of MultiParton Scatterings (BAMPS). In addition to the initially created heavy quarks in hard parton scatterings during nucleon-nucleon collisions, secondary heavy quark production in the quark-gluon plasma is investigated and the sensitivity on various parameters is estimated. In BAMPS heavy quarks scatter with particles of the medium via elastic collisions, whose cross section is calculated with the running coupling and a more precise implementation of Debye screening. In this framework, we compute the elliptic flow and nuclear modification factor of heavy quarks and compare it to the experimental data.