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

Citations per year

199119972003200920140510152025
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