Transverse momentum and collision energy dependence of high p(T) hadron suppression in Au+Au collisions at ultrarelativistic energies

The STAR collaboration
Phys.Rev.Lett. 91 (2003) 172302, 2003.

Abstract (data abstract)
BNL-RHIC. We report high statistics measurements of inclusive charged hadron production in Au+Au and p+p collisions at √sNN =200 GeV. A large, approximately constant hadron suppression is observed in central Au+Au collisions for 5<pT<12 GeV/c. The collision energy dependence of the yields and the centrality and pT dependence of the suppression provide stringent constraints on theoretical models of suppression. Models incorporating initial-state gluon saturation or partonic energy loss in dense matter are largely consistent with observations. We observe no evidence of pT-dependent suppression, which may be expected from models incorporating jet attentuation in cold nuclear matter or scattering of fragmentation hadrons.

  • Table 1

    Data from Figure 1


    Inclusive invariant pT distributions of (h+ + h−)/2 for centrality-selected Au+Au and p+p NSD interactions. Hash marks at the top...

  • Table 2

    Data from Figure 2


    R200/130(pT ) vs. pT for (h+ + h−)/2 for four different centrality bins. The overall normalization uncertainty is +6−14% for...

  • Table 3

    Data from Figure 3


    RAA(pT) (Eq. 1) for (h+ + h−)/2 in |η|<0.5, for centrality-selected Au+Au spectra relative to the measured p+p spectrum. The...

  • Table 4

    Data from Figure 4


    RCP (pT) vs. pT for (h+ + h−)/2. Calculations are described in the text.

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