Yoji Totsuka, the former director-general of KEK and an outstanding contributorto major advances in neutrino physics, passed away on 10 July aged 66.rnTotsuka was one of the first generation of students to study under Masatoshi Koshiba, the 2002 Nobel Prize laureate in physics, at the graduate school of the University of Tokyo. Receiving his PhD in 1972, he began his career working as a research associate at the University of Tokyo on the Double-Arm Spectrometer, an experiment atthe DORIS electron-positron collider at DESY, Hamburg.
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