Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collins Effect from Polarized SIDIS and $e^+e^-$ Data   The recent data on the transverse single spin asymmetry
$A_{UT}^{\sin(\phi_h+\phi_S)}$ from HERMES and COMPASS Collaborations are
analysed within LO parton model with unintegrated parton distribution and
fragmentation functions. A fit of SIDIS data from HERMES Collaboration is
performed leading to the extraction of favoured and unfavoured Collins
fragmentation functions. A very good description of COMPASS data is obtained.
BELLE $e^+e^-$ data are shown to be compatible with our estimates based on the
extracted Collins fragmentation functions. Predictions for
$A_{UT}^{\sin(\phi_h+\phi_S)}$ asymmetries at JLab and COMPASS operating on a
proton target are given.

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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: econ