Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the Differential Cross Section for Isolated Prompt Photon
  Production in pp Collisions at 7 TeV   A measurement of the differential cross section for the inclusive production
of isolated prompt photons in proton-proton collisions at a centre-of-mass
energy of 7 TeV is presented. The data sample corresponds to an integrated
luminosity of 36 inverse picobarns recorded by the CMS detector at the LHC. The
measurement covers the pseudorapidity range |eta|<2.5 and the transverse energy
range 25 < ET < 400 GeV, corresponding to the kinematic region 0.007 < xT <
0.114. Photon candidates are identified with two complementary methods, one
based on photon conversions in the silicon tracker and the other on isolated
energy deposits in the electromagnetic calorimeter. The measured cross section
is presented as a function of ET in four pseudorapidity regions. The
next-to-leading-order perturbative QCD calculations are consistent with the
measured cross section.

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The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph