Centrality and pseudorapidity dependence of charged hadron production at intermediate p(T) in Au plus Au collisions at root s(NN)=130 GeV

Abstract

We present STAR measurements of charged hadron production as a function of centrality in Au+Au collisions at roots(NN)=130 GeV. The measurements cover a phase space region of 0.2<p(T)<6.0 GeV/c in transverse momentum and -1<eta<1 in pseudorapidity. Inclusive transverse momentum distributions of charged hadrons in the pseudorapidity region 0.5<\eta\<1 are reported and compared to our previously published results for \eta\<0.5. No significant difference is seen for inclusive p(T) distributions of charged hadrons in these two pseudorapidity bins. We measured dN/deta distributions and truncated mean p(T) in a region of p(T)>p(T)(cut), and studied the results in the framework of participant and binary scaling. No clear evidence is observed for participant scaling of charged hadron yield in the measured p(T) region. The relative importance of hard scattering processes is investigated through binary scaling fraction of particle production.