Study of Jet Fragmentation Using High-$p_{T}$ Photon Triggered Events in PHENIX

In high-energy, central Au+Au collisions it is well-known that the $p_{T}$ distribution of hadrons associated with jet fragmentation is modified with respect to p+p collisions. The $p_{T}$ distribution of photons produced in hard collisions, however, is not modified. Using the presence of a high-$p_{T}$ direct photon to identify hard collisions, we have obtained a sample of jets in a manner which is not biased by the mechanism which alters the hadron spectrum. We discuss a method for tagging direct photons in the PHENIX detector. We present distributions of jets properties indirect photon-tagged Au+Au, Cu+Cu, and p+p collisions and theirdependence on centrality and reaction plane orientation.