Centrality dependence of π±, K±, p, and (p)over-bar production from √SNN = 130 GeV Au+Au collisions at RHIC -: art. no. 242301

Identified pi(+/-), K+/-, p, and (p) over bar transverse momentum spectra at midrapidity in roots(NN) = 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) over bar yields per participant increase faster than the pi(+/-) yields. In central collisions at high transverse momenta (p(T) greater than or similar to 2 GeV/c), (p) over bar and p yields are comparable to the pi(+/-) yields.