Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MEtop - a top FCNC event generator   We present a new Monte Carlo generator for Direct top and Single top
production via flavour-changing neutral currents (FCNC). This new tool
calculates the cross section and generates events with Next-to-Leading order
precision for the Direct top process and Leading-Order precision for all other
FCNC single top processes. A set of independent dimension six FCNC operators
has been implemented - including four-fermion operators - where at least one
top-quark is present in the interaction.

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The categories of this paper are: astro-ph
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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: ao-sci
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: stat