Both theoretical considerations and experimental observations indicate that the Standard Model (SM) of particle physics cannot be the ultimate theory of nature. For example, although in the SM the lepton flavor number is conserved, the observation of neutrino oscillation tells us that the lepton flavor number is violated in nature. To obtain the observed neutrino data, the SM has to be augmented to give neutrinos tiny but nonzero masses. Any extension of the SM will potentially induce novel effects on various observable quantities. It is up to a phenomenologist to identify and analyze such effects.

      On the other hand, some observables such as the parton distribution and hadron structure are so complicated that it is almost impossible to derive them from the first principles of the SM. To explain and analyze the data, phenomenologists develop various effective theories.
 

      The high energy phenomenology group at IPM has been recently formed and is active in the following topics:
- neutrino physics
- QCD calculations
- MSSM
- parton distribution and hadron structure
- the phenomenology of the non-commutative geometry
- B-physics