Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single top-quark production with the ATLAS detector in pp collisions at
  sqrt(s)=7TeV   The ATLAS experiment at the LHC at CERN has analyzed 2010 and 2011 data
looking for electroweak production of single top quarks in the lepton+jets and
di-lepton final states. The production cross section for the t-channel process
is measured to be 76 +41 -21 pb using 156 pb^-1 of 2011 data. A first limit is
set on the Wt associated production process using lepton+jets and di-lepton
events. The 95% CL upper limit on the Wt production cross section is 158 pb
using 35 pb^-1 of 2010 data.

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The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph