Centrality dependence of π+/-, K+/-, p, and p production from √sNN = 130 GeV Au + Au collisions at RHIC

Identified π + / - , K + / - , p, and p transverse momentum spectra at midrapidity in √s N N = 130 GeV Au + Au collisions were measured by the PHENIX experiment at RHIC as a function of collision centrality. Average transverse momenta increase with the number of participating nucleons in a similar way for all particle species. Within errors, all midrapidity particle yields per participant are found to be increasing with the number of participating nucleons. There is an indication that K + / - , p, and p yields per participant increase faster than the π + / yields. In central collisions at high transverse momenta (p T 2 GeV/c), p and p yields are comparable to the π + / - yields.