Open heavy flavor and J/psi at RHIC and LHC

TL;DR

This paper uses the BAMPS model to study heavy flavor suppression and flow in heavy ion collisions at RHIC and LHC, highlighting the importance of radiative processes and comparing model predictions with experimental data.

Contribution

It introduces an improved BAMPS framework with elastic and radiative processes for heavy flavor transport, providing new insights into suppression and flow phenomena at RHIC and LHC.

Findings

Charm and bottom quark interactions modeled with improved Debye screening.

Model reproduces elliptic flow data with a K factor of 3.5.

Underestimates nuclear modification factors for D mesons and J/psi at LHC.

Abstract

The suppression and collective flow of open and hidden heavy flavor in ultra-relativistic heavy ion collisions is studied with the partonic transport model Boltzmann Approach to MultiParton Scatterings (BAMPS). Charm and bottom quarks interact with the rest of the medium via elastic scatterings with an improved Debye screening and a running coupling. Heavy flavor electron data from RHIC can only be described if the cross section is multiplied with K=3.5 to mimic the contribution from radiative processes. With the same value for K we compare to elliptic flow data of D mesons at the LHC and find a good agreement. However, the nuclear modification factor of D mesons, non-prompt J/psi, muons, and electrons at the LHC is underestimated in our calculations. In addition, we present first BAMPS results on the suppression and elliptic flow of J/psi mesons, which are treated in the same framework.