Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gluon Polarization in e^+e^- -> t \bar t G: Polar Angle Dependence and
  Beam Polarization Effects   We calculate the linear and circular polarization of gluons produced in
conjunction with massive quarks in the annihilation process $e^+e^-\to q \bar q
G$. The linear polarization is calculated in the hadron event plane as well as
in the gluon-beam plane. Beam polarization and polar orientation effects are
included in our discussion. For typical top pair production energies at the
Next-Linear-Collider (NLC) the degree of linear polarization in the hadron
event plane remains close to its soft gluon value of 100% over most of the
energy spectrum of the gluon. The linear polarization in the gluon-beam plane
is generally smaller but peaks toward the hard end of the gluon spectrum. The
dependence of the linear polarization on beam polarization and on the polar
orientation of the gluon is small. The circular polarization is largest for
maximal gluon energies and shows a strong dependence on the longitudinal beam
polarization. The longitudinal polarization of the beam may therefore be used
to tune the circular polarization of the gluon. The massive quark results are
compared with the corresponding results for the massless quark case.

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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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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: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an