High-$p_T$ Measurement of Azimuthal Anisotropy of Electrons from Semi-leptonic Decay of Open Heavy Flavor Mesons in Au+Au Collisions at $\sqrt{s_{NN}}=200 GeV$ by the PHENIX Experiment

The azimuthal anisotropy of open heavy flavor mesons at RHIC provides information about the early stages of heavy ion collisions. PHENIX observed a large azimuthal anisotropy parameter $v_2$ of electrons from heavy flavor decays from RHIC Run4 at low tranverse momentum. Together with the observation of constituent quark scaling of $v_2$ for light hadrons, the electron $v_2$ is consistent in coalescense models with charm quarks flowing as much as light quarks. With the addition of a reaction plane detector in PHENIX and the increased statistics of RHIC Run7, $v_2$ of electrons can be measured with much-improved precision, answering the question of whether heavy flavor continues to flow in the range of $p_T$ in which beauty production is believed to be comparable to that of charm. We present the $p_T$ and collision centrality dependency of the azimuthal anisotropy of single electrons from open heavy flavor decays from RHIC Run7 data in PHENIX.