Centrality dependence of high $p_{T}$ hadron suppression in Au+Au collisions at $\sqrt{s}_{NN}$ = 130-GeV

The STAR collaboration
Phys.Rev.Lett. 89 (2002) 202301, 2002.

Abstract (data abstract)
BNL-RHIC. Inclusive transverse momentum distributions of charged hadrons within $0.2<p_T<6.0$ GeV/c have been measured over a broad range of centrality for Au+Au collisions at $\sqrt{s_{NN}} =130$ GeV. Hadron yields are suppressed at high $p_T$ in central collisions relative to peripheral collisions and to a nucleon-nucleon reference scaled for collision geometry. Peripheral collisions are not suppressed relative to the nucleon-nucleon reference. The suppression varies continuously at intermediate centralities. The results indicate significant nuclear medium effects on high $p_T$ hadron production in heavy ion collisions at high energy.

  • Figure 1: Inclusive pT distributions

    Data from Figure 1


    Inclusive $p_T$ distributions of ($h^+ + h^−)/2$. Non-central bins are scaled down by the indicated factors. The combined statistical and...

  • Figure 2: Ratio of charged hadron yields

    Data from Figure 2


    Ratio of charged hadron yields within $|\eta| < 0.5$ for central over peripheral collisions, normalized to $\langle Nbin\rangle$.

  • Figure 3: RAA vs pT

    Data from Figure 3


    $R_{AA}$($p_T$) for various centrality bins, for Au+Au relative to an NN reference spectrum. Error bars are described in the text....

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