High pT Parton Energy Loss from Jet Pair Correlation Observables in the PHENIX Experiment

By controlling several experimental observables, such as momentum and reaction plane, the PHENIX experiment has performed a systematic study of high pT parton energy loss in hot nuclear matter, as well as jet-induced medium modifications, such as the ridge and shoulder. Baseline d+Au measurements are also studied to provide the comparison as a control for cold nuclear matter effect.