Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-p_T Charged Hadron Suppression in Au+Au Collisions at sqrt(s_NN) =
  200 GeV   The PHENIX experiment at RHIC has measured charged hadron yields at
mid-rapidity over a wide range of transverse momentum (0.5 < p_T < 10 GeV/c) in
Au+Au collisions at sqrt(s_NN)=200 GeV. The data are compared to pi^zero
measurements from the same experiment. For both charged hadrons and neutral
pions, the yields per nucleon-nucleon collision are significantly suppressed in
central compared to peripheral and nucleon-nucleon collisions. The suppression
sets in gradually and increases with increasing centrality of the collisions.
Above 4-5 GeV/c in p_T, a constant and almost identical suppression of charged
hadrons and pi^zeroes is observed. The p_T spectra are compared to published
spectra from Au+Au at sqrt(s_NN)=130 in terms of x_t scaling. Central and
peripheral pi^zero as well as peripheral charged spectra exhibit the same x_t
scaling as observed in p+p data.

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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: stat