Prof. Takaaki Kajita

Prof. Takaaki Kajita

Prof. Takaaki Kajita

Takaaki Kajita is the Special University Professor at the University of Tokyo, and also the Director of the Institute for Cosmic Ray Research (ICRR) of the University of Tokyo. Kajita received his Ph.D. from the University of Tokyo School of Science in 1986, and has been researching at Kamiokande and Super-Kamiokande detectors at the Kamioka Observatory in central Japan. In 1998, at the Neutrino International Conference held in Takayama, Gifu, he showed the analysis results which provided strong evidence for atmospheric neutrino oscillations. In 2015 he shared the Nobel Prize in Physics for his role in discovering atmospheric neutrino oscillations. Currently, he is the project leader for KAGRA Project, aiming to explore the gravitational wave astronomy.

 

Neutrino oscillations and neutrino mass

Neutrinos are one of the elementary particles. They have been assumed to have no mass. It was predicted that, if they have masses, they should change their type while they propagate. The phenomena are called neutrino oscillations. Neutrino oscillations were discovered by the Super-Kamiokande experiment. I will discuss the discovery of neutrino oscillations and the implications of the small neutrino masses.

Exploring the Universe with neutrinos, cosmic rays, gammas and gravitational waves

In the Universe, there are various high energy phenomena that cannot be studied by optical telescopes. For example, the mechanism of Supernova explosion can only be understood by the observation of neutrinos and gravitational waves. In this lecuture, I will discuss the research in the Universe with cosmic neutrinos, cosmic rays, gamma rays and gravitational waves.