Abstract
A supersymmetric model for a large neutrino magnetic moment is presented. The neutrino mass is protected by an approximate horizontal symmetry. The model possessed an unbroken ℓ e -ℓ μ symmetry which enforces the eqality of the electron and muon neutrino masses. We find that for a 10 eV neutrino, the neutrino can have a magnetic transition moment up to 10 −12 μ B without tuning of parameters. With tuning, the mass can be further suppressed or the magnetic moment correspondingly increased.
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