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Direct photons provide a insightful tool to study the different stages of aheavy ion collision, especially the formation of a quark-gluon plasma, withoutbeing influenced by the strong interaction and hadronization processes. Theyield of direct photons can be determined based on the inclusive photon yieldand the background from hadronic decays. We present a new analysis techniqueapplied to PHENIX Run4 Au+Au dataset. It uses strict particleidentification(PID) in the Electromagnetic Calorimeter(EMCal) and a chargedparticle veto to extract a clean photon signal. These photons are then taggedwith EMCal photon candidates with loose PID cuts, which can be reconstructedwith high efficiency, to determine the fraction of photons originating from$\pi^{0}$ decays. Many systematic uncertainties and detector effects cancel inthis method.

Search for Direct Photons from $\sqrt{s_{NN}}=200GeV$ AuAu Collisions Using a New $\pi^{0}$ Tagging Method in the PHENIX Experiment at RHIC