Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NNLO corrections to top pair production at hadron colliders: the
  quark-gluon reaction   We compute the next-to-next-to-leading order QCD correction to the total
inclusive top pair production cross-section in the reaction qg \to t\bar t + X.
We find moderate O(1%) correction to central values at both Tevatron and LHC.
The scale variation of the cross-section remains unchanged at the Tevatron and
is significantly reduced at the LHC. We find that recently introduced
approximation based on the high-energy limit of the top pair cross-section
significantly deviates from the exact result. The results derived in the
present work are included in version 1.4 of the program Top++. Work towards
computing the reaction gg\to t\bar t+X is ongoing.

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The categories of this paper are: alg-geom
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The categories of this paper are: cs
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg