The elementary particle physics is currently understood within the context of the Standard Model, which is a gauge theory for quarks and leptons. It is, however, an important issue to find out what is the more fundamental theory that is valid in smaller spacial scales or higher energy scales. From various theoretical and experimental reasons, supersymmetric models and supersymmetric grand unified theories are supposed to be promising candidates. The purpose of my current research is to clarify from theoretical viewpoints how physics beyond the Standard Model like supersymmety can be explored from various physical processes such as Higgs boson searches, B meson decays, and muon rare decays.

Elementary Particle Theory

Particle Physics

Now we have the Standard Model which is in excellent agreement with almost of all current experiments. However, there still are some mysteries in the Standard Model and thus many physicists believe the existence of new physics beyond the Standard Model. Supersymmetric theories and brane world scenarios are known as plausible candidates, and these have been intensively investigated. I have been working on new physics model building and investigating ways to check new physics models in future experiments. Also I have been working on particle cosmology and astrophysics, which are strongly related to new physics models.