Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of lepton number violating interactions on $t \bar t$ production
  at NLC   We discuss the effects of lepton number violating interactions namely,
R-parity violation and leptoquarks on top quark pair production at the upcoming
$e^+ e^-$ linear colliders. Effects of SU(2) singlet, doublet and triplet
leptoquark interactions are investigated. R-parity violating minimal
supersymmetric standard model also allows certain kinds of lepton number
violating interactions which are same as singlet leptoquarks with left-handed
interactions. We have calculated the cross-section of $e^+ e^- \to t \bar t$ in
presence of the above interactions. With conservative values of lepton number
violating coupling strengths we got enhancement of top-pair production
cross-section in all of the above cases.

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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org