Takaaki Kajita, Nobel Laureate in physics in Stockholm December 2015
|Education||Saitama Prefectural Kawagoe High School|
|Alma mater||Saitama University (B.S.)|
University of Tokyo (M.S., Ph.D.)
|Awards||Asahi Prize (1988)|
Bruno Rossi Prize (1989)
Nishina Memorial Prize (1999)
Panofsky Prize (2002)
Japan Academy Prize (2012)
Nobel Prize in Physics (2015)
Fundamental Physics Prize (2016)
|Institutions||Institute for Cosmic Ray Research, University of Tokyo|
|Doctoral advisor||Masatoshi Koshiba|
|Other academic advisors||Yoji Totsuka|
Takaaki Kajita (梶田 隆章 Kajita Takaaki, Japanese pronunciation: [kadʑita takaːki]; born 9 March 1959) is a Japanese physicist, known for neutrino experiments at the Kamiokande and its successor, Super-Kamiokande. In 2015, he was awarded the Nobel Prize in Physics jointly with Canadian physicist Arthur B. McDonald.
Kajita was born in 1959 in Higashimatsuyama, Saitama, Japan. He liked studying thought rather than memorizing, especially with interest in physics, organism, world history, Japanese history, and earth science in high school. He studied physics at the Saitama University and graduated in 1981. He received his doctorate in 1986 at the University of Tokyo. In UTokyo, he joined Masatoshi Koshiba's laboratory because they were "somehow interested".
Since 1988 Kajita has been at the Institute for Cosmic Radiation Research, University of Tokyo, where he became an assistant professor in 1992 and professor in 1999.
He became director of the Center for Cosmic Neutrinos at the Institute for Cosmic Ray Research (ICRR) in 1999. As of 2017[update], he is a Principal Investigator at the Institute for the Physics and Mathematics of the Universe in Tokyo, and Director of ICRR.
In 1998, Kajita's team at the Super-Kamiokande found that when cosmic rays hit the Earth's atmosphere, the resulting neutrinos switched between two flavours before they reached the detector under Mt. Kamioka. This discovery helped prove the existence of neutrino oscillation and that neutrinos have mass. In 2015, Kajita shared the Nobel Prize in Physics with Canadian physicist Arthur McDonald, whose Sudbury Neutrino Observatory discovered similar results. Kajita's and McDonald's work solved the longstanding Solar neutrino problem, which was a major discrepancy between the predicted and measured Solar neutrino fluxes, and indicated that the Standard Model, which required neutrinos to be massless, had weaknesses. In a news conference at the University of Tokyo, shortly after the Nobel announcement, Kajita said, "I want to thank the neutrinos, of course. And since neutrinos are created by cosmic rays, I want to thank them, too."
Professor Kajita, who is the PI of KAGRA, won the Nobel prize in physics !!