Fast decaying neutrinos and observable flavour violation in a new class of majoron models

Details Fast decaying neutrinos and observable flavour violation in a new class of majoron models Fast decaying neutrinos and observable flavour violation in a new class of majoron models

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phlb..216..360g&link_type=abstract

Physics Letters B, Volume 216, Issue 3-4, p. 360-366.

Physics

114

Scientific paper

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.

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