Studying the medium modification of jets via high-pT hadron angular correlations

We report the analysis of high-pT hadron angular correlation performed by the PHENIX collaboration. The goal of the analysis is to investigate the medium modification of jets in the RHIC heavy-ion collisions. Two angular correlation techniques are used in our analysis: two-particle azimuthal correlation (2-p) and three-particle correlation (3-p). In the 2-p analysis, we focus on the pT and collision system evolution of the jets medium modification. In the 3-p analysis, we focus on the discrimination of two scenarios of jets medium modification, Mach Cone (Casalderrey-Solana J et al 2006 Preprint hep-ph/0602183) and deflected jets (Hwa Chiu 2006 Preprint nucl-th/0609038)