Centrality dependence of charged particle multiplicity in Au-Au collisions at square root of (s)NN = 130 GeV

Phys Rev Lett. 2001 Apr 16;86(16):3500-5. doi: 10.1103/PhysRevLett.86.3500.

Abstract

We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions at square root of [s(NN)] = 130 GeV measured with the PHENIX detector at RHIC. For the 5% most central collisions we find dN(ch)/d eta(vertical line eta = 0) = 622+/-1(stat)+/-41(syst). The results, analyzed as a function of centrality, show a steady rise of the particle density per participating nucleon with centrality.