Centrality and pseudorapidity dependence of charged hadron production at intermediate ${p}_{T}$ in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=130\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$

Centrality and pseudorapidity dependence of charged hadron production at intermediate $p_{T}$ in $Au + Au$ collisions at $\sqrt{s_{N N}} = 130 GeV$

J. Adams et al. (STAR Collaboration)

Phys. Rev. C 70, 044901 – Published 6 October 2004

Abstract

We present STAR measurements of charged hadron production as a function of centrality in $Au + Au$ collisions at $\sqrt{s_{N N}} = 130 GeV$ . The measurements cover a phase space region of $0.2 < p_{T} < 6.0 GeV ∕ c$ in transverse momentum and $- 1 < η < 1$ in pseudorapidity. Inclusive transverse momentum distributions of charged hadrons in the pseudorapidity region $0.5 < ∣ η ∣ < 1$ are reported and compared to our previously published results for $∣ η ∣ < 0.5$ . No significant difference is seen for inclusive $p_{T}$ distributions of charged hadrons in these two pseudorapidity bins. We measured $d N ∕ d η$ 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.