Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the cross section for top-quark pair production in pp
  collisions at sqrt(s) = 7 TeV with the ATLAS detector using final states with
  two high-pt leptons   A measurement is reported of the production cross section of top-quark pairs
in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with
the ATLAS detector at the LHC. Candidate events have a signature consistent
with containing two isolated leptons, large missing transverse momentum, and at
least two jets. Using a data sample corresponding to an integrated luminosity
of 0.70 fb^-1, a t-tbar production cross section sigmattbar=176 +/-5 (stat) +14
-11 (syst) +/- 8 (lum.) pb is measured for an assumed top-quark mass of m_t =
172.5 GeV.

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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
2
The categories of this paper are: math
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: nlin