SUPERSYMMETRY HIERARCHY PROBLEMS AND ANOMALOUS HORIZONTAL U(1) SYMMETRY

It is suggested that various hierarchy problems in supersymmetric stan dard model, i.e. the Yukawa hierarchies, the mu problem, and the suppr ession of dangerous baryon and/or lepton number (B/L) violating coupli ngs, are resolved altogether in the framework of horizontal U(1) symme try whose spontaneous breaking results in the appearance of one expans ion parameter (the Cabibbo angle). Within a reasonable range of U(1) c harges, there exist a few models compatible with experiments, The spec ific sizes of B/L violating couplings of these models are calculated a nd several phenomenological consequences are discussed.