The fraction of muon tracks in cosmic neutrinos

Abstract

The study of the distintive signatures of the ultra high energy events recently seen by IceCube can allow to single the neutrino origin out. The detection of tau neutrinos would be a clear way to prove that they come from cosmic distances, but at the highest energies currently seen, about 1 PeV, an experimental characterization of tau events is difficult. The study of the fraction of the muon tracks seems more promising. In fact, for any initial composition, because of the occurrence of flavor oscillations and despite their uncertainties, the fraction of muon tracks in the cosmic neutrinos is smaller than the one of atmospheric neutrinos, even hypothesizing an arbitrarily large contribution from charmed mesons. A good understanding of the detection efficiencies and the optimization of the analysis cuts, along with a reasonable increase in the statistics, should provide us with a significant test of the cosmic origin of these events.

8 pages, 2 figure

References in corpus (9)

• Flavor Composition and Energy Spectrum of Astrophysical Neutrinos
• Ice Cube Observed PeV Neutrinos from AGN Cores
• Neutrino Decays over Cosmological Distances and the Implications for Neutrino Telescopes
• Flavor Ratios of Astrophysical Neutrinos: Implications for Precision Measurements
• Demystifying the PeV Cascades in IceCube: Less (Energy) is More (Events)
• Sub-PeV Neutrinos from TeV Unidentified Sources in the Galaxy
• An Analysis of Cosmic Neutrinos: Flavor Composition at Source and Neutrino Mixing Parameters
• How precisely neutrino emission from supernova remnants can be constrained by gamma ray observations?
• Neutrino flux ratios at neutrino telescopes: The role of uncertainties of neutrino mixing parameters and applications to neutrino decay

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• The natural parametrization of cosmic neutrino oscillations
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• Multi-PeV Signals from a New Astrophysical Neutrino Flux Beyond the Glashow Resonance
• A Multi-Component Model for the Observed Astrophysical Neutrinos
• The flavor composition of astrophysical neutrinos after 8 years of IceCube: an indication of neutron decay scenario?
• Flavor revolution at ICECUBE horizons?
• Tau Appearance from High-Energy Neutrino Interactions
• The spectrum and flavor composition of the astrophysical neutrinos in IceCube