Probing Cold and Hot, Dense Nuclear Media Via High-pT Jets with Di-hadron and γ-hadron Correlations at PHENIX

With the recent high statistics Au+Au and Cu+Cu runs at RHIC, it has become possible to systematically study jet properties in several different colliding systems with potentially different final state interactions. In this talk we present results from high-pT di-hadron and γ-hadron correlations from p+p, d+Au, Cu+Cu, and Au+Au collisions where jets in vacuum, cold nuclear matter, and hot, dense nuclear matter are studied.