Tsutomu Yanagida

Tsutomu Yanagida (born 1949) is a Japanese physicist who first proposed the seesaw mechanism and developed the model of leptogenesis.

Tsutomu Yanagida received a PhD in physics at Hiroshima University in 1977. . In 1979, he proposed the seesaw mechanism, that explains the mass of neutrinos by introduction heavy right-handed neutrinos. Together with M. Fukugita, he developed the model of leptogenesis that traces the baryon asymmetry back to a lepton asymmetry. Till 2019 he was professor at Kavli Institute for Physics and Mathematics of the Universe at Tokio University. Some of his students in Tokio were Yasunori Nomura, Junji Hisano and Takeo Moroi.In 2019, he was appointed professor at Shanghai Jiao Tong University. His research includes theoretical particle physics, string theory and cosmology. Yanagida works on super symmetry, inflation and the baryon asymmetry. He is corresponding member of theAcademy of Sciences and Humanities in Hamburg.In 2017 he visited the Higgs Center of Theoretical Physics at Edinburgh University as guest scientist.

• 1992: Nishina Memorial Prize
• 2011: Hertz Lecture at DESY Hamburg
• 2014: Helmholtz International Fellow Award

• Tsutomu Yanagida: Horizontal Symmetry and Masses of Neutrinos In: Progress of Theoretical Physics, volume 64, issue 3, September 1980, p. 1103–1105
• Tsutomu Yanagida, Motohiko Yoshimura: Various Schemes of Neutrino Mixing In: Progress of Theoretical Physics, volume 64, issue 5, November 1980, p. 1870–1873
• Masataka Fukugita, Tsutomu Yanagida: Baryogenesis without grand unification, Phys.Lett. B174, 45-47 (1986)
• Wilfried Buchmüller, Roberto Peccei, Tsutomu Yanagida: Leptogenesis as the origin of matter. In: Annual Review of Particle and Nuclear Physics, volume 55, 2005, S. 311–355

• Masataka Fukugita, Tsutomu Yanagida: Physics of Neutrinos and Application to Astrophysics, Springer, 2003