Fermion masses, SU(2)L×U(1)Y, and the solar-neutrino problem

Details Fermion masses, SU(2)L×U(1)Y, and the solar-neutrino problem Fermion masses, SU(2)L×U(1)Y, and the solar-neutrino problem

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..45.2192g&link_type=abstract

Physical Review D (Particles and Fields), Volume 45, Issue 7, 1 April 1992, pp.R2192-R2195

Physics

Quark And Lepton Masses And Mixing

Scientific paper

The connection between fermion mass generation in the standard model (SM) and matter resonant oscillation [Mikheyev-Smirnov-Wolfenstein (MSW)] solutions to the solar- and atmospheric-neutrino deficits is examined. Given our lack of understanding of the wide range of values spanned by fermion masses, as emphasized by the heaviness of the top quark, it is not impossible that fermions obtained their masses in a manner unrelated to electroweak symmetry breaking. If this is the case, then, within the context of the simplest possible extension to the SM, adding only right-handed neutrino fields, we emphasize that the MSW solution to both the above deficits can be naturally realized via active⇆sterile oscillations, with both small and large vacuum mixing angles. In the large-angle case, a flux in the vicinity of 40-50 neutrino units is expected in the Gallium experiments, along with a suppressed neutral current event rate in the Sudbury Neutrino Observatory detector.

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