Stability of Neutrinos in the Singlet Majoron Model

Abstract

We show that there is no one-loop enhancement of the rate for a light neutrino to decay into a lighter neutrino plus a majoron, contrary to a recent claim. Thus the light neutrinos must satisfy the cosmological bound of having masses less than 35 eV in the singlet majoron model, or else violate the constraint imposed by galaxy formation. In the latter case, ${\nu }_{\tau }$ could have a mass between 40 and 500 keV, while satisfying all other cosmological constraints.

11 pp., latex, UMN-TH-1218-93. Correct nucleosynthesis bound of 500 keV on nu_tau mass is incorporated; one-loop electroweak contribution to neutrino mass is corrected

References in corpus (4)

• Planck Scale Effects on the Majoron
• Planck Scale Symmetry Breaking and Majoron Physics
• New Upper Limits on the Tau Neutrino Mass from Primordial Helium Considerations
• A Natural Framework for Solar and 17 keV Neutrinos

Cited by in corpus (5)

• Neutrino Masses in the Supersymmetric Standard Model with Right-Handed Neutrinos and Spontaneous R-Parity Violation
• Structure Formation with Decaying Neutrinos
• Electroweak Phase Transition and LHC Signatures in the Singlet Majoron Model
• Constraints on Massive Tau Neutrinos and their Cosmological Implications
• A Single Scale Theory for Cold and Hot Dark Matter