Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-particle correlations in Au+Au collisions at $\sqrt{s_{NN}} = 130$
  GeV   We present preliminary results on two new two-particle correlation analyses
of Au+Au collisions at $\sqrt{s_{NN}} = 130 GeV$ performed by the STAR
collaboration. Two-pion interferometry with respect to the reaction plane shows
that the pion source can be described as an ellipse extended out of the
reaction plane. Analysing the pion-kaon correlation functions, we show that, on
average, pions and kaons are not emitted at the same position and/or time. Both
measurements are interpreted in the so-called blast wave model framework whose
main feature is a strong flow.

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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: math
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: cond-mat