17 keV neutrino and large magnetic moment solution of the solar neutrino puzzle

Abstract

Zee-type models with Majorons naturally incorporate the 17 keV neutrino but in their minimal version fail to simultaneously solve the solar neutrino puzzle. If there is a sterile neutrino state, we find a particularly simple solution to the solar neutrino problem, which besides ${\nu }_{17}$ predicts a light Zeldovich-Konopinski-Mahmoud neutrino ${\nu }_{light}={\nu }_e+{\nu }_{\mu }^c$ with a magnetic moment being easily as large as $10^{-11}{\mu }_B$ through the Barr-Freire-Zee mechanism.

Comments: 11 pages, 2 figures (not included but available upon request), LaTex, IC/92/216, SISSA-141/92/EP, LMU-10/92