Lepton flavor violation as a probe of quark-lepton unification

1550-7998=20 The recent measurements of the solar neutrino mixing angle sol and the Cabibbo mixing angle C reveal a surprising relation, sol C ’ 4 , which has been interpreted as an evidence for quark-lepton unification. We show in realizations of quark-lepton unification that the PMNS mixing matrix can be decomposed into a CKM-like matrix and maximal mixing matrices. We explore a possibility to probe such implications by considering the relative sizes of branching ratios for the lepton flavor violating radiative decay processes, li ! lj , in the context of the supersymmetric standard model with heavy right-handed Majorana neutrinos.