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The hypothesis of nonradiative neutrino decay is tested using the latest IceCube data. The track-to-shower ratio expected in IceCube is calculated in a complete decay scenario, taking into account the uncertainties in neutrino oscillation parameters and assuming only one stable neutrino. The subset of high-energy neutrino events observed by IceCube above 60 TeV, combined with the information provided by passing muons, actually disfavors the possibility of neutrinos decay at about a 2 level of significance for both the normal and inverted neutrino mass hierarchy.
Pagliaroli et al. (Tue,) studied this question.
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