Neutrino Masses in Superstring Derived Standard--like Models

Abstract

We propose a new scenario in a class of superstring derived standard--like models that explains the suppression of the left--handed neutrino masses. Due to nonrenormalizable terms and the breaking of the $U(1{)}_{Z^{\prime }}$ symmetry a generalized see--saw mechanism takes place. Contrary to the traditional see--saw mechanism in GUTs, the see--saw scale and the right--handed neutrino mass scale are suppressed relative to the $U(1{)}_{Z^{\prime }}$ breaking scale.

SSCL--Preprint--193

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• Construction of Realistic Standard--like Models in the Free Fermionic Superstring Formulation
• Gauge Coupling Unification in Superstring Derived Standard--like Models
• Cabibbo Mixing in Superstring Derived Standard--like Models

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