Neutrino non-radiative decay and the diffuse supernova neutrino background

Abstract

We revisit the possibility that neutrinos undergo non-radiative decay. We investigate the potential to extract information on the neutrino lifetime-to-mass ratio from the diffuse supernova neutrino background. To this aim, we explicitly consider the current uncertainties on the core-collapse supernova rate and the fraction of failed supernovae. We present predictions in a full 3 neutrino framework in the absence and presence of neutrino non-radiative decay, for the Super-Kamiokande+Gd, the JUNO, the Hyper-Kamiokande, and the DUNE experiments, that should observe the diffuse supernova neutrino background in the near future. Our results show the importance of a 3 neutrino treatment of neutrino decay and of identifying the neutrino mass ordering to break possible degeneracies between DSNB predictions in the presence of decay and standard physics.

19 pages, 15 figures, text improved, 2 Appendices added

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Cited by in corpus (4)

• Energy-dependent Boosted Dark Matter from Diffuse Supernova Neutrino Background
• Diffuse Neutrino Flux Based on the Rates of Core-collapse Supernovae and Black Hole Formation Deduced from a Novel Galactic Chemical Evolution Model
• SN1987A and neutrino non-radiative decay
• Impacts of Black-Hole-Forming Supernova Explosions on the Diffuse Neutrino Background