Title: New stage of neutrino physics with precision measurement of theta_13

Speaker:Prof. Hisakazu Minakata (南方久和), Tokyo Metropolitan University, Japan

Host: Prof. CAO Jun

Time: 10:30, September 21, 2012

Place: Room C305, IHEP Main Building

Abstract:

After theta_13 is determined with high precision by Daya Bay and other experiments we have entered into a new era in neutrino physics. I discuss how large theta_13 affects strategy of exploration of remaining unknowns in neutrino masses and lepton mixing. In particular, ways for determination of neutrino's mass pattern (called the "mass hierarchy") are strongly influenced by large theta_13. I review situations that may be called as "hundred flowers campaign". With regard to lepton CP violation, the impact looks much less and I will try to explain the reasons why it is so.

About the speaker:

Hisakazu Minakata is a Professor Emeritus of Physics Department, Tokyo Metropolitan University. He has been working on neutrino physics, mainly on neutrino phenomenology, for the last 25 years. His contribution include: introduction of bi-probability plot as a tool to understand structure of neutrino oscillation, and finding the parameter degeneracy, existence of multiple solutions due to the unknown mass hierarchy. Also his paper with KamLAND experimentalists triggered a booming of reactor theta_13 experiments. He also worked on soft hadronic collisions, magnetic monopoles, two-dimensional field theories, etc.

Minakata received his B.S. in Physics from Shizuoka University in 1970, and Dr. of Science from Hiroshima University in 1976 for high energy theoretical physics.