$\pi^{0}$ production in Cu+Au at PHENIX

Recent $\sqrt{s_{NN}}$ = 200 GeV Cu+Au collisions at RHIC provide a new system to study collision dynamics using high $p_{T}$ $\pi^{0}$ production at mid-rapidity at PHENIX. The asymmetric Cu+Au collisions create unique initial-state collision geometries including odd harmonics beyond fluctuations and very central events where the Cu nucleus is embedded in the Au nucleus. The reaction plane dependence of $\pi^{0}$s allows us to probe different core-corona regions in these very central events, and to study the path length dependence of energy loss with different initial geometries. PHENIX has measured the suppression of $\pi^{0}$s with respect to reaction plane in 200 GeV Au+Au collisions and found it consistent with a cubic path length dependence, suggesting a non-perturbative energy loss model. The status of the Cu+Au $\pi^{0}$ analysis will be presented and compared with PHENIX Au+Au results.