Physics – Nuclear Physics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988nuphb.310..714b&link_type=abstract
Nuclear Physics B, Volume 310, Issue 3-4, p. 714-742.
Physics
Nuclear Physics
35
Scientific paper
We present a minimal extension of the standard electroweak theory which, as a consequence of the spontaneous breaking of lepton number and the radiative origin of the neutrino mass, offers a natural framework for the solution of the solar neutrino problem through matter-enhanced neutrino oscillations (Mikheyev-Smirnov-Wolfenstein mechanism). Indeed, we show that the presently available astrophysical bounds on the lepton-breaking vacuum expectation value naturally lead to neutrino masses in the required regime. The fact that the Majoron belongs to an SU(2)L doublet and not a triplet has relevant phenomenological implications. In particular, the scalar contribution to the Z0 width is four times smaller than in the triplet model and equivalent to 1/2 a neutrino-antineutrino mode. Relevant effects related to the presence of two physical singly charged scalars, both at the quantum and tree level, are studied. As a result we find that the model is tightly constrained by present data. In particular, for a wide range of parameters, the decay μ --> eγ is within two orders of magnitude from the present experimental limit.
Also at Department de Física Teòrica, Universitat de València and IFIC, Universitat de València-CSIC, Spain.
Bertolini Stefano
Santamaria Arcadi
No associations
LandOfFree
The doublet majoron model and solar neutrino oscillations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The doublet majoron model and solar neutrino oscillations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The doublet majoron model and solar neutrino oscillations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1759503