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We study several phenomenologies of an E_6 inspired extra U(1) model with S_4flavor symmetry. With the assignment of left-handed quarks and leptons toS_4-doublet, SUSY flavor problem is softened. As the extra Higgs bosons areneutrinophilic, baryon number asymmetry in the universe is realized byleptogenesis without causing gravitino overproduction. We find that the allowedregion for the lightest chargino mass is given by 100-140 GeV, if the darkmatter is a singlino dominated neutralino whose mass is about 36 GeV.

Phenomenology of S_4 Flavor Symmetric extra U(1) model