title: Back-to-back correlations of high-p(T) hadrons in relativistic heavy-ion collisions.
abstract: We investigate the suppression factor and the azimuthal correlation function for high p(T) hadrons in central Au+Au collisions at sqrt[s(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) 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.
authors.affiliation: Physics Department, University of Tokyo, Tokyo 113-0033, Japan.
authors.forename: Tetsufumi
authors.initials: T
authors.lastname: Hirano
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nara