Decomposition of awayside components of dijet correlation in Au+Au collisions at $\sqrt{S_{NN}}=200$ GeV

A hot dense QCD matter is created by heavy ion collision in Relativistic Heavy Ion Collider (RHIC). Since parton fragments from high-$p_{T}$ scattering form back-to-back hadron pairs, studying the dihadron or photon-hadron angular correlation can probe the medium response to energy deposited by the partons. At intermediate transverse momentum ($p_{T}$), modified away-side dijet correlation has been observed. Unlike p+p collisions, where the away side peaks at $\Delta\phi =\pi$, there is a local minimum at $\Delta\phi = \pi$ in Au+Au. The modified shape suggests a medium response to energy deposited by the transiting parton. We present photon-hadron correlations from $\sqrt{s_{NN}}=200$ GeV Au+Au collisions in the PHENIX run4 data set. We separate the jet components which ``punch through'' the medium from the side peak due to the medium response, counting the number of particles observed in each. These are studied as a function of collision centrality and compared with the p+p dijet correlation.