Neutrino masses and the Voloshin-Vysotsky-Okun solution to the solar-neutrino problem

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Scientific paper

We analyze the problem of reconciling small neutrino masses with the large electron-neutrino magnetic moment μ~(0.3-1)×10-10μB required for the Voloshin-Vysotsky-Okun solution to the solar-neutrino puzzle. The model studied employs interaction between leptons and a charged SU(2)-singlet scalar particle carrying lepton number 2, recently shown able to produce a large magnetic moment by Fukugita and Yanagida. The model possesses zero eigenvalues for the one-loop matrix of mass corrections in several relevant cases. However, imposing an ultraviolet cutoff procedure, the magnitudes of other radiative corrections are too large in each case to allow an acceptable solution even when an optimistic interpretation is given to the cutoff dependence.

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