Insight from elliptic flow of open charm mesons using quark coalescence model at RHIC and LHC energies

TL;DR

This paper investigates the elliptic flow of open charm mesons at RHIC and LHC energies using a quark coalescence model combined with the AMPT framework, highlighting the influence of medium viscosity on charm meson flow.

Contribution

It introduces a detailed study of charm meson elliptic flow incorporating quark coalescence and viscous effects, comparing with experimental data at LHC energies.

Findings

Elliptic flow of charm mesons is sensitive to QGP viscosity.

Model results agree with LHC experimental data.

Charm meson flow shows greater sensitivity to medium viscosity than light hadrons.

Abstract

A study of elliptic flow of open charm mesons, $D^0$ and $D_S ^\pm$ using quark coalescence as a mechanism of hadronization of heavy quarks implemented in conjunction with A Multi Phase Transport (AMPT) model has been presented. We have studied the transverse momentum dependence of the elliptic flow parameter at mid-rapidity ($|y|$ $<$ 1.0) for Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV (RHIC) and Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV (LHC) for different values of partonic interaction cross-section and QCD coupling constant. We have compared our calculations with the experimentally measured data at the LHC energy. We have also studied the effect of shear viscosity on elliptic flow of open charm mesons within the transport model approach. Our study indicates that the elliptic flow of open charmed mesons is more sensitive to viscous properties of QGP medium as compared to light charged hadrons.