Cosmologically interesting neutrino decay in supersymmetry with broken R-parity
Sep, 1990
5 pages
Published in:
- Phys.Lett.B 256 (1991) 218-222
- Published: 1991
Report number:
- SISSA-123-90-EP
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Abstract: (Elsevier)
We show that in the minimal supersymmetric standard model with broken R -parity, for which the lepton number violating couplings induce neutrino masses and transition magnetic moments at one loop, the radiative decay of the heaviest neutrino v h → v ℓ + γ can have in a natural way a typical lifetime τ ≈10 23 s if the mass scale for v h is ≈30 eV. In this case, v h can provide the missing mass of the universe, and its radiative decay happens at the required rate to explain several astrophysical observations of the H α emission lines and ionization of the HI clouds. We discuss scenarios in which v h is mainly v μ or v τ .- supersymmetry
- neutrino: radiative decay
- radiative decay: neutrino
- neutrino: lifetime
- lepton number: violation
- dark matter
- R parity: violation
- violation: R parity
- Feynman graph
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