High $p_T$ Inclusive Charged Hadron Spectra from Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV

Abstract

The STAR Collaboration presents new measurements of inclusive charged hadron distributions for $p_T<$ 12 GeV/c from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Charged hadron suppression at high $p_T$ is similar in shape and magnitude at all centralities to that observed previously at $\sqrt{s_{NN}}$ = 130 GeV for $p_T<$ 6 GeV/c. The ratio of spectra from central and peripheral Au+Au collisions shows that hadron suppression is approximately constant within 6 $<p_T<$ 12 GeV/c. The ratios of charged hadron spectra at the two beam energies show a 15-20% increase in yield at low $p_T$. At high $p_T$, the ratios show a larger increase that agrees well with pQCD calculations of the $\sqrt{s_{NN}}$ dependence of particle production in Au+Au collisions.

4 pages, 4 figures, Quark Matter 2002 Proceedings

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