Most of the free parameters in the Standard Model (SM)—a quantum field theory which has
successfully elucidated the behaviors of strong, weak and electromagnetic interactions of all …

Neutrinoless double-beta decay, which is a very old and yet elusive process, is reviewed. Its
observation will signal that the lepton number is not conserved and that the neutrinos are …

I provide a pedagogical introduction to supersymmetry. The level of discussion is aimed at
readers who are familiar with the Standard Model and quantum field theory, but who have …

I provide a pedagogical introduction to supersymmetry. The level of discussion is aimed at
readers who are familiar with the Standard Model and quantum field theory, but who have …

Following recent results from the SNO solar neutrino experiment and the K2K long-baseline
neutrino experiment, the combined existing data on neutrino oscillations now point strongly …

Tri-bimaximal mixing is a specific lepton mixing ansatz, which has been shown to account
very successfully for the established neutrino oscillation data. Working in a particular basis …

A broad overview of the current status of proton stability in unified models of particle
interactions is given which includes non-supersymmetric unification, SUSY and SUGRA …

We point out two simple but instructive possibilities to modify the tri-bimaximal neutrino
mixing ansatz, such that leptonic CP violation can naturally be incorporated into the resultant …

We review the modular flavor symmetric models of quarks and leptons focusing on our
works. We present some flavor models of quarks and leptons by using finite modular groups …

We give an overview of recent progress in the study of fermion mass and flavor mixing
phenomena. The hints exhibited by the quark and lepton mass spectra towards possible …