Centrality Dependence of [Formula presented], [Formula presented], [Formula presented], and [Formula presented] Production from [Formula presented] Au + Au Collisions at RHIC

Abstract

Identified [Formula presented], [Formula presented], [Formula presented], and [Formula presented] transverse momentum spectra at midrapidity in [Formula presented] 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 [Formula presented], [Formula presented], and [Formula presented] yields per participant increase faster than the [Formula presented] yields. In central collisions at high transverse momenta [Formula presented], [Formula presented] and [Formula presented] yields are comparable to the [Formula presented] yields. © 2002 The American Physical Society.