Abstract
Inclusive transverse momentum distributions of charged hadrons within [Formula presented] have been measured over a broad range of centrality for [Formula presented] collisions at [Formula presented]. Hadron yields are suppressed at high [Formula presented] in central collisions relative to peripheral collisions and to a nucleon-nucleon reference scaled for collision geometry. Peripheral collisions are not suppressed relative to the nucleon-nucleon reference. The suppression varies continuously at intermediate centralities. The results indicate significant nuclear medium effects on high-[Formula presented] hadron production in heavy-ion collisions at high energy.