Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rho^0 meson production in the pp ->pppi+pi- reaction at 3.67 GeV/c   Total and differential cross sections for the exclusive reaction pp->pp rho^0
observed via the pi+pi- decay channel have been measured at beam momentum=3.67
GeV/c. The observed total meson production cross section is determined to be
23.4 +- 0.8 +-8 microb and is significantly lower than typical cross sections
used in model calculations for heavy ion collisions. The differential cross
sections measured indicate a strong anisotropy cos^2(theta^{CM}) in the rho^0
meson production.

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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin