Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Muons in IceCube   The IceCube detector allows for the first time a measurement of atmospheric
muon and neutrino energy spectra from tens of GeV up to the PeV range. The
lepton flux in the highest energy region depends on both the primary cosmic ray
composition around the "knee" and the contribution from prompt decays of mostly
charmed hadrons produced in air showers. It is demonstrated here that a direct
measurement of the atmospheric muon spectrum in the region above 100 TeV is
feasible using data that is already available.

33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
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The categories of this paper are: eess
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph