Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-Q^2 neutral current cross sections in e^+p deep inelastic
  scattering at sqrt{s}=318 GeV   Cross sections for e^+p neutral current deep inelastic scattering have been
measured at a centre-of-mass energy of sqrt{s}=318 GeV with the ZEUS detector
at HERA using an integrated luminosity of 63.2 pb^-1. The double-differential
cross section, d^2sigma/dxdQ^2, is presented for 200 GeV^2 < Q^2 < 30000 GeV^2
and for 0.005 < x < 0.65. The single-differential cross-sections dsigma/dQ^2,
dsigma/dx and dsigma/dy are presented for Q^2 > 200 GeV^2. The effect of
Z-boson exchange is seen in dsigma/dx measured for Q^2 > 10000 GeV^2. The data
presented here were combined with ZEUS e^+p neutral current data taken at
sqrt{s}=300 GeV and the structure function F_2^{em} was extracted. All results
agree well with the predictions of the Standard Model.

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The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph