Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV
  using the ATLAS detector at the LHC   The luminosity calibration for the ATLAS detector at the LHC during pp
collisions at sqrt(s) = 7 TeV in 2010 and 2011 is presented. Evaluation of the
luminosity scale is performed using several luminosity-sensitive detectors, and
comparisons are made of the long-term stability and accuracy of this
calibration applied to the pp collisions at sqrt(s) = 7 TeV. A luminosity
uncertainty of Delta L/L = +/- 3.5% is obtained for the 47 pb-1 of data
delivered to ATLAS in 2010, and an uncertainty of Delta L/L = +/- 1.8% is
obtained for the 5.5 fb-1 delivered in 2011.

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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an