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Advances in High Energy Physics
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2012
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Article
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Fig 2
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Review Article
Atmospheric Neutrinos
Figure 2
A neutrino trajectory that enters a spherical Earth with zenith angle
will exit with a new zenith angle
. Assuming that the primary fluxes are equal at the entry and exit points (isotropy) one can deduce the updown symmetry of the fluxes [
54
].