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Kajita and McDonald Won Nobel Physics Prize for Work on Neutrinos

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Takaaki Kajita of Japan and Arthur McDonald of Canada won the Nobel Prize in physics for their work on neutrinos.Neutrinos are the second most abundant subatomic particles in the universe, after photons, which carry light.


Discovery : Neutrino oscillations which shows that neutrinos have mass..

Nobel Prize for physics was awarded to Dr. Kajita and Dr. McDonald for showing that the neutrinos didn’t disappear at all but merely changed identities.

Takaaki Kajita discovered that neutrinos from the atmosphere switch between two identities on their way to the Japan’s Super-Kamiokande detector.While working at the Sudbury Neutrino Observatory in Canada, McDonald found that neutrinos coming from the sun were not disappearing on their way to Earth. Instead they were captured with a different identity .

Prize Money : 8 million Swedish kronor ($953,500) cash award

Takaaki Kajita is director of the Institute for Cosmic Ray Research and professor at the University of Tokyo

Arthur McDonald is a professor emeritus at Queen’s University in Kingston, Canada.

Neutrino Facts :

  1. Neutrinos are the second most abundant subatomic particles in the universe.
  2. Neutrino means ‘small neutral one’ in Italian
  3. Three types : electron neutrino, muon neutrino and tau neutrino
  4. Neutrino first proposed by the  Swiss scientist Wolfgang Pauli