Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Azimuthal and spin asymmetries in $e^+e^-\to V \pi X$ at high energies
  and 3D fragmentation functions   We present the systematical decomposition results of three-dimensional (3D)
fragmentation functions (FFs) from parton correlators for spin-1 hadron. We
choose one of the best process $e^+e^-\to V\pi X$ to study the 3D and tensor
polarization dependent FFs. By making a general kinematic analysis we show that
the cross section is expressed by 81 independent structure functions, and get
the results of the azimuthal and spin asymmetries. We also present the parton
model results for this process and express the results in terms of the 3D FFs.
Based on this formalism, we also give the numerical results of hadron
longitudinal polarizations and predict the energy dependence.

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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: nlin