Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Threshold Top Quark Production in $e^+e^-$ Annihilation: Rescattering
  Corrections   Top quark pair production close to threshold at a next linear collider is
discussed, with special focus on the influence of rescattering corrections.
Numerical results are shown for the differential cross-section, i.e. the
momentum distribution and the forward backward asymmetry, and for moments of
the angular distribution of leptons arising from the semileptonic top quark
decay.

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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: physics
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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: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: math
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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: hep-th