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

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 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 $\sqrt{s_{NN}}=200GeV$ (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 the viscous properties of the quark–gluon plasma medium as compared to light charged hadrons. (paper)