Guaranteed sources of neutrinos are the cosmogenic high energy neutrino flux from interactions of cosmic rays with the cosmic microwave background and the galactic neutrino flux resulting from galactic cosmic rays interacting with the interstellar medium.
MUONS AND NEUTRINOS At the depth of IceCube, the event rate from downgoing atmospheric muons is close to 6 orders of magnitude higher than the event rate from atmospheric neutrinos.
2 Muon rate in IceCube as a function of zenith angle5.The data agree with the detector simulation which includes atmospheric neutrinos, atmospheric muons, and coincident cosmic ray muons (two muons erroneously reconstructed as a single track.) Fig.
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