Stability of Neutrinos in the Singlet Majoron Model
High Energy Physics - Phenomenology
2009-10-22 v2 Astrophysics
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, could have a mass between 40 and 500 keV, while satisfying all other cosmological constraints.
Keywords
Cite
@article{arxiv.hep-ph/9309316,
title = {Stability of Neutrinos in the Singlet Majoron Model},
author = {James M. Cline and Kimmo Kainulainen and Sonia Paban},
journal= {arXiv preprint arXiv:hep-ph/9309316},
year = {2009}
}
Comments
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