Heavy quarks and charmonium at RHIC and LHC within a partonic transport model

TL;DR

This paper uses a partonic transport model to simulate heavy quark and charmonium production, evolution, and suppression in heavy-ion collisions at RHIC and LHC, providing insights into their dynamics and medium interactions.

Contribution

It introduces detailed transport simulations with a running coupling and Debye screening for heavy quarks and charmonium, comparing results to experimental data and exploring suppression and regeneration mechanisms.

Findings

Elliptic flow and nuclear modification factor of heavy quarks match experimental data.

Preliminary J/psi suppression results at RHIC are presented.

Cold nuclear matter effects and regeneration are significant in J/psi suppression.

Abstract

Heavy quark and charmonium production as well as their space-time evolution are studied in transport simulations of heavy-ion collisions at RHIC and LHC. In the partonic transport model Boltzmann Approach of MultiParton Scatterings (BAMPS) heavy quarks can be produced in initial hard parton scatterings or during the evolution of the quark-gluon plasma. Subsequently, they interact with the medium via binary scatterings with a running coupling and a more precise Debye screening which is derived from hard thermal loop calculations, participate in the flow and lose energy. We present results of the elliptic flow and nuclear modification factor of heavy quarks and compare them to available data. Furthermore, preliminary results on J/psi suppression at forward and mid-rapidity are reported for central and non-central collisions at RHIC. For this, we study cold nuclear matter effects and the dissociation as well as regeneration of J/psi in the quark-gluon plasma.