Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron-Positron Annihilation into Four Jets at Next-to-Leading Order
  in $\alpha_s$   We calculate the rate for $e^+e^-$ annihilation into four jets at
next-to-leading order in perturbative QCD, but omitting terms that are
suppressed by one or more powers of $1/\Nc^2$, where $\Nc$ is the number of
colors. The $\cO(\alpha_s^3)$ corrections depend strongly on the jet resolution
parameter $\ycut$ and on the clustering and recombination schemes, and they
substantially improve the agreement between theory and data.

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The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
34
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: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph