Physics – Nuclear Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994nuphb.423..405u&link_type=abstract
Nuclear Physics B, Volume 423, Issue 2-3, p. 405-436.
Physics
Nuclear Physics
20
Scientific paper
Implications of the spontaneous lepton-number/R-parity violation are investigated in the supersymmetric singlet majoron model, by giving attention to the neutrino properties and the related issues. The neutrino mass spectrum may exhibit a hierarchy, mve << mvμ << mvτ, for a specific choice of the coupling parameters, which corresponds to the approximate global symmetries for the conservations of the respective ordinary lepton flavors. The lifetime of the neutrino decay vj --> viJ is estimated roughly to be πv ~ 109 s . (mvi/100 eV)-1 (mvj/100 keV)-4 for mvj>mvj. Then, a detailed numerical analysis is performed on the neutrino masses, mixing and lifetimes to confirm these order estimates, in particular, for the case of vπ with a mass ~ 10 keV-10 MeV. The experimental constraints derived from some relevant processes involving the massive neutrinos can actually be satisfied there. The results are further compared with a variety of constraints which are placed by the astrophysical and cosmological considerations on the neutrinos and majoron. Some experimental signatures for the lepton-number/R-parity violation are also discussed.
Umemura Isao
Yamamoto Katsuji
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