Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of transverse polarization asymmetries of charged pion pairs
  in e+e- annihilation near sqrt s=10.58 GeV   The interference fragmentation function translates the fragmentation of a
quark with a transverse projection of the spin into an azimuthal asymmetry of
two final-state hadrons. In e+e- annihilation the product of two interference
fragmentation functions is measured. We report nonzero asymmetries for pairs of
charge-ordered pi+pi- pairs, which indicate a significant interference
fragmentation function in this channel. The results are obtained from a 672
fb-1 data sample that contains 711 \times 106 pi+pi- pairs and was collected at
and near the ?(4S) resonance, with the Belle detector at the KEKB
asymmetric-energy e+e- collider.

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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin