Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymmetry Effects in Polarized Hadron Scattering   We calculate the single-spin and double-spin asymmetry differential cross
sections for the polarized hadron scattering $PP \to l^+ l^- + jet$ up to
$O(\alpha_s)$ by the helicity amplitude method. Numerical results of the
differential cross sections, which can be used to probe the spin contents of
the proton, are obtained with several sets of polarized parton distribution
functions.

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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
2
The categories of this paper are: math