Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flavor Dependence of T-odd PDFs   The flavor dependence of the naive time reversal odd (``T-odd'') parton
distributions for $u$- and $d$-quarks are explored in the spectator model. The
flavor dependence of $h_{1}^{\perp}$ is of significance for the analysis of the
azimuthal $\cos(2\phi)$ asymmetries in unpolarized SIDIS and DY-processes, as
well as for the overall physical understanding of the distribution of
transversely polarized quarks in unpolarized nucleons. As a by-product of the
formalism, we calculate the chiral-odd but ``T-even'' function $h_{1L}^{\perp}$
which enables us to present a prediction for the single spin asymmetry
$A_{UL}^{\sin(2\phi)}$ for a longitudinally polarized target in SIDIS.

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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: astro-ph
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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: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg