Rapidity dependence of highpT suppression Original Research Article

We present high transverse momentum hadron spectra forAu +Au andd +Au collisions at√sNN = 200GeV. TheAu + Au data are obtained at pseudorapidties η = 0 and η = 2.2 and thed + Au data at η = 0. Thed + Au data do not show evidence for highpT suppression, thus ruling out initial state effects as an explanation for the strong suppression observed in centralAu + Au collisions. The suppression in centralAu + Au collisions extends to the forward rapidities, which indicates that the medium responsible for the suppression is extended in the longitudinal direction.