Gabriele Ferretti, Denis Karateev
We present a class of extensions of the MSSM characterized by a fully chiral field content (no mu-terms) and no baryon or lepton number violating term in the superpotential due to an extra U'(1) gauge symmetry. The minimal models consist of the usual matter sector with family dependent U'(1) charges, six Higgs weak doublets, and four charged singlets required to give masses to the Higgsinos, cancel anomalies and allow for commensurate charges. These models are characterized by a discrete set of solutions for the charges. Right handed neutrino superfields can also be added. We discuss the general features of the minimal models and analyze the experimental constraints on Flavor Changing processes.
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http://arxiv.org/abs/1206.0761
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