Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tau neutrino fluxes from atmospheric charm   We present an evaluation of the atmospheric tau neutrino flux in the energy
range between $10^2$ and $10^6$ GeV. The main source of tau neutrinos is from
charmed particle production and decay. The $\nu_\tau N\to \tau X$ event rate
for a detector with a water equivalent volume of 1 km$^3$ is on the order of
60-100 events per year for $E_\tau>100$ GeV, reducing to 18 events above 1 TeV.
Event rates for atmospheric muon neutrino oscillations to tau neutrinos are
also evaluated.

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The categories of this paper are: econ
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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: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: cmp-lg