Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on Neutrino-Nucleon Interactions at energies of 1 EeV with
  the IceCube Neutrino Observatory   A search for extremely high energy cosmic neutrinos has been carried out with
the IceCube Neutrino Observatory. The main signals in the search are
neutrino-induced energetic charged leptons and their rate depends on the
neutrino-nucleon cross section. The upper-limit on the neutrino flux has
implications for possible new physics beyond the standard model such as the
extra space-time dimension scenarios which lead to a cross section much higher
than the standard particle physics prediction. In this study we constrain the
neutrino-nucleon cross section at energies beyond $10^9$ GeV with the IceCube
observation. The constraints are obtained as a function of the extraterrestrial
neutrino flux in the relevant energy range, which accounts for the
astrophysical uncertainty of neutrino production models.

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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: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat