Back-to-back correlations of high-pT hadrons in relativistic heavy-ion collisions -: art. no. 082301

We investigate the suppression factor and the azimuthal correlation function for high p(T) hadrons in central Au+Au collisions at roots(NN)=200 GeV by using a dynamical model in which hydrodynamics is combined with explicitly traveling jets. We study the effects of parton energy loss in a hot medium, intrinsic k(T) of partons in a nucleus, and p(perpendicular to) broadening of jets on the back-to-back correlations of high p(T) hadrons. Parton energy loss is found to be a dominant effect on the reduction of the awayside peaks in the correlation function.