LEPTON-FLAVOR VIOLATION IN THE SUPERSYMMETRIC STANDARD MODEL WITH SEESAW-INDUCED NEUTRINO MASSES

We examine the lepton-flavor violation caused by a Yukawa coupling matrix y(nu ij) for right-handed neutrinos in the supersymmetric standard model. We stress that decay rates for tau --> mu gamma and mu --> e gamma are largely enhanced in a parameter region where left-right mixing terms in the slepton mass matrix are substantially large. Especially, these decay rates may reach the range to be accessible to near future experiments even if the SO(10)-like boundary condition on y(vij) is used. We also discuss how the rates behave if one changes the ansatz on the Yukawa coupling matrix for the right-handed neutrinos.