Which is the flavor of cosmic neutrinos seen by IceCube?

Abstract

We analyze the high-energy neutrino events observed by IceCube, aiming to probe the initial flavor of cosmic neutrinos. We study the track-to-shower ratio of the subset with energy above 60 TeV, where the signal is expected to dominate and show that different production mechanisms give rise to different predictions even accounting for the uncertainties due to neutrino oscillations. We include for the first time the passing muons observed by IceCube in the analysis. They corroborate the hypotheses that cosmic neutrinos have been seen and their flavor matches expectations.

arXiv comment4 pages, 1 figure

References in corpus (16)

• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• Neutrino Interactions at Ultrahigh Energies
• Updated fit to three neutrino mixing: status of leptonic CP violation
• Detecting Nutau Oscillations as PeV Energies
• Detecting Tau Neutrino Oscillations at PeV Energies
• Atmospheric and Astrophysical Neutrinos above 1 TeV Interacting in IceCube
• Measuring Flavor Ratios of High-Energy Astrophysical Neutrinos
• Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube
• Effects of neutrino mixing on high-energy cosmic neutrino flux
• On the flavor composition of the high-energy neutrino events in IceCube
• How precisely neutrino emission from supernova remnants can be constrained by gamma ray observations?
• Expected neutrino signal from supernova remnant RX J1713.7-3946 and flavor oscillations
• Aspects of the Flavor Triangle for Cosmic Neutrino Propagation
• Neutron β-decay as the origin of IceCube's PeV (anti)neutrinos
• The fraction of muon tracks in cosmic neutrinos

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