Stability of Neutrinos in the Singlet Majoron Model

Details Stability of Neutrinos in the Singlet Majoron Model Stability of Neutrinos in the Singlet Majoron Model

1993-09-23

arxiv.org/abs/hep-ph/9309316v2

Phys.Lett. B319 (1993) 513-519

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/0370-2693(93)91759-G

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.

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