Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the top quark pair production cross section in pp
  collisions at sqrt(s) = 7 TeV in dilepton final states with ATLAS   A measurement of the production cross section of top quark pairs (ttbar) in
proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the
ATLAS detector at the Large Hadron Collider is reported. Candidate events are
selected in the dilepton topology with large missing transverse energy and at
least two jets. Using a data sample corresponding to an integrated luminosity
of 35 pb^-1, a ttbar production cross section of 171 +/- 20(stat.) +/-
14(syst.) +8-6(lum.) pb is measured for an assumed top quark mass of 172.5 GeV.
A second measurement requiring at least one jet identified as coming from a b
quark yields a comparable result, demonstrating that the dilepton final states
are consistent with being accompanied by b-quark jets. These measurements are
in good agreement with Standard Model predictions.

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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph