Fast Decaying Neutrinos and Observable Flavor Violation in a New Class of Majoron Models

Sep, 1988
7 pages
Published in:
  • Phys.Lett.B 216 (1989) 360-366
  • Published: 1989
Report number:
  • CERN-TH-5170-88,
  • FTUV-10-88

Citations per year

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Abstract: (Elsevier)
Neutrinos can have any mass (allowed by laboratory limits) without violating limits from cosmology, astrophysics or laboratory searches for lepton violation phenomena. We present a simple extension of the standard theory where neutrinos decay dominantly into invisible modes involving a majoron associated with the spontaneous violation of B - L symmetry due to physics at or below the electroweak scale. Measurable branchings for lepton-flavour-violating processes such as μ →e+ γ , and for non-standard Z decays e.g. Z → e + τ , and Z →μ+ τ (plus their conjugates) at LEP are possible without unnatural fine-tuning of the parameters. Lepton-number-violating effects such as neutrinoless ββ decay may also be present at a measurable level.
  • NEUTRINO: DECAY MODES
  • DECAY MODES: NEUTRINO
  • NEUTRINO: MASS
  • MASS: NEUTRINO
  • POSTULATED PARTICLE: MAJORON
  • B-L NUMBER: SPONTANEOUSLY BROKEN
  • MUON: RADIATIVE DECAY
  • RADIATIVE DECAY: MUON
  • Z0: LEPTONIC DECAY
  • LEPTONIC DECAY: Z0