Probing Late Neutrino Mass Properties with Supernova Neutrinos

Abstract

Models of late-time neutrino mass generation contain new interactions of the cosmic background neutrinos with supernova relic neutrinos (SRNs) through exchange of the on-shell light boson, leading to significant modification of the differential SRN flux observed at earth. We consider Abelian U(1) model for generating neutrino masses at low scales and we show that there is a large parameter space in this model for which the changes induced in the flux by the exchange of the light bosons might allow one to distinguish between neutrinos being Majorana or Dirac particles, the type of neutrino mass hierarchy (normal or inverted or quasi-degenerate), and could also possibly determine the absolute values of the neutrino masses. Measurements of the presence of these effects would be possible at the next-generation water Cerenkov detectors enriched with Gadolinium, or a large 100 kton liquid argon detector.

arXiv comment29 pages latex, 15 figures included. Version to be published in Phys. Rev. D., added discussion of signal detection for water Cerenkov and liquid argon detectors, and discussion of non-adiabatic vs adiabatic neutrino evolution, new figures added, references updated. Results unchanged

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• Are small neutrino masses unveiling the missing mass problem of the Universe?
• Neutrino Self-Interactions: A White Paper
• Core-Collapse Astrophysics with a Five-Megaton Neutrino Detector
• MeV scale leptonic force for cosmic neutrino spectrum and muon anomalous magnetic moment
• Mind the gap on Icecube: Cosmic neutrino spectrum and muon anomalous magnetic moment in the gauged L_μ - L_τ model
• Dips in the Diffuse Supernova Neutrino Background
• Core-collapse supernovae stymie secret neutrino interactions
• Neutrinoless double-beta decay with massive scalar emission
• Probing secret interactions of eV-scale sterile neutrinos with the diffuse supernova neutrino background
• Towards Probing the Diffuse Supernova Neutrino Background in All Flavors
• Resonant Neutrino Self-Interactions
• Non-Universal Stellar Initial Mass Functions: Large Uncertainties in Star Formation Rates at $z\approx 2-4$ and Other Astrophysical Probes
• Probing self-interacting sterile neutrino dark matter with the diffuse supernova neutrino background