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

Abstract

An intriguing new behavior was reported in elementary hadron production at relativistic heavy ion collider (RHIC). In central Au-Au collisions the antiprotons yield was comparable to the π- at high transverse momentum. The results showed that the transverse energy density and particle multiplicities were higher than the previously observed multiplicities in the relativistic heavy-ion collisions.