The Sliding-singlet Mechanism Revived

Abstract

It is shown, using a modification of an idea of Sen, that completely realistic supersymmetric grand-unified theories based on SU(6) or larger unitary groups can be constructed using the sliding-singlet mechanism. These models have a simple structure, preserve the successful prediction of ${\sin }^2{\theta }_W$, and can suppress Higgsino-mediated proton decay to an acceptable level in a simple way.

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