Heavy sterile neutrino emission in core-collapse supernovae: Constraints and signatures

Abstract

Heavy sterile neutrinos with masses $\mathcal{O}(100)$ MeV mixing with active neutrinos can be produced in the core of a collapsing supernova (SN). In order to avoid an excessive energy loss, shortening the observed duration of the SN 1987A neutrino burst, we show that the active-sterile neutrino mixing angle should satisfy ${\sin }^2\theta \lesssim 5\times 10^{-7}$. For a mixing with tau flavour, this bound is much stronger than the ones from laboratory searches. Moreover, we show that in the viable parameter space the decay of such "heavy" sterile neutrinos in the SN envelope would lead to a very energetic flux of daughter active neutrinos; if not too far below current limits, this would be detectable in large underground neutrino observatories, like Super-Kamiokande, as a (slightly time-delayed) high-energy bump in the spectrum of a forthcoming Galactic SN event.

24 pages, 12 figures; v2: discussions expanded, matches the published version in JCAP

References in corpus (8)

• How to find neutral leptons of the nuMSM?
• Constraints on Sterile Neutrinos in the MeV to GeV Mass Range
• Supernova bound on keV-mass sterile neutrinos reexamined
• Earth matter effects in supernova neutrinos: Optimal detector locations
• Unparticle constraints from SN1987A
• Turbulent Supernova Shock Waves and the Sterile Neutrino Signature in Megaton Water Detectors
• Probing neutrino oscillations from supernovae shock waves via the IceCube detector
• Role of medium modifications for neutrino-pair processes from nucleon-nucleon bremsstrahlung - Impact on the protoneutron star deleptonization

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