Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\Lambda$, $\bar{\Lambda}$ Polarization and Spin Transfer in Lepton
  Deep-Inelastic Scattering   The flavor and helicity distributions of the $\Lambda$ and $\bar{\Lambda}$
hyperons for both valence and sea quarks are calculated in a perturbative QCD
(pQCD) based model. We relate these quark distributions to the fragmentation
functions of the $\Lambda$ and $\bar{\Lambda}$, and calculate the
$z$-dependence of the longitudinal spin transfer to the $\Lambda$ and
$\bar{\Lambda}$ in lepton deep-inelastic scattering (DIS). It is shown that the
spin transfer to the $\Lambda$ is compatible with the first HERMES results at
DESY and further tests are suggested. We also make predictions for the
$z$-dependence of the $\Lambda$ and $\bar{\Lambda}$ longitudinal polarizations
in neutrino (antineutrino) DIS processes. We investigate the sea contribution
to the fragmentation functions, and we test a possible scenario where sea
quarks in $\Lambda$ (or sea antiquarks in $\bar{\Lambda}$) are negatively
polarized, whereas sea antiquarks in the $\Lambda$ (or sea quarks in
$\bar{\Lambda}$) are positively polarized. The asymmetry of the polarized
fragmentation functions of sea quarks and antiquarks to $\Lambda$ and
$\bar{\Lambda}$ provides a way to understand the different behaviour between
the $\Lambda$ and $\bar{\Lambda}$ spin transfers observed in the recent E665
experiment at FNAL.

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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph