Tsutomu Yanagida

Tsutomu Yanagida is a Japanese physicist who first proposed the seesaw mechanism in 1979 and developed the model of leptogenesis.

In 1994, he predicted, together with M. Fukugita, the nonzero cosmological constant Λ = (3 ± 1 meV)4 [1] four years prior to the observation[2] in order to resolve the age discrepancy between the Universe and some old stars.

Some of his students in Tokyo were Yasunori Nomura, Junji Hisano and Takeo Moroi.

[5] His research includes theoretical particle physics, string theory and cosmology.

[6] In 2017 he visited the Higgs Centre of Theoretical Physics at Edinburgh University as guest scientist.