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Kajita, McDonald win Nobel physics prize for neutrino oscillation discovery

  • A screen shows the winners as members of the Nobel Assembly announce the winner of the 2015 Nobel Prize in physics, in Stockholm, Tuesday Oct. 6, 2015. Takaaki Kajita of Japan and Arthur McDonald of Canada won the Nobel Prize in physics for the discovery of neutrino oscillations. The Royal Swedish Academy of Sciences said the two researchers had made key contributions to experiments showing that neutrinos change identities. (Fredrik Sandberg/TT via AP) SWEDEN OUT

    A screen shows the winners as members of the Nobel Assembly announce the winner of the 2015 Nobel Prize in physics, in Stockholm, Tuesday Oct. 6, 2015. Takaaki Kajita of Japan and Arthur McDonald of Canada won the Nobel Prize in physics for the discovery of neutrino oscillations. The Royal Swedish Academy of Sciences said the two researchers had made key contributions to experiments showing that neutrinos change identities. (Fredrik Sandberg/TT via AP) SWEDEN OUT  (The Associated Press)

  • This April, 2010 photo shows Takaaki Kajita of Japan, director of the Institute for Cosmic Ray Research and professor at the University of Tokyo.  Kajita and Arthur McDonald of Canada won the Nobel Prize in physics on Tuesday, Oct. 6, 2015,  for the discovery of neutrino oscillations.(Kyodo News via AP) JAPAN OUT, CREDIT MANDATORY

    This April, 2010 photo shows Takaaki Kajita of Japan, director of the Institute for Cosmic Ray Research and professor at the University of Tokyo. Kajita and Arthur McDonald of Canada won the Nobel Prize in physics on Tuesday, Oct. 6, 2015, for the discovery of neutrino oscillations.(Kyodo News via AP) JAPAN OUT, CREDIT MANDATORY  (The Associated Press)

  • Professors Anne L'Huillier, left, Goran K. Hansson and Olga Botner, right, members of the Nobel Assembly announce the winner of the 2015 Nobel Prize in physics, in Stockholm, Tuesday Oct. 6, 2015. Takaaki Kajita of Japan and Arthur McDonald of Canada won the Nobel Prize in physics for the discovery of neutrino oscillations. The Royal Swedish Academy of Sciences said the two researchers had made key contributions to experiments showing that neutrinos change identities. (Fredrik Sandberg/TT via AP) SWEDEN OUT

    Professors Anne L'Huillier, left, Goran K. Hansson and Olga Botner, right, members of the Nobel Assembly announce the winner of the 2015 Nobel Prize in physics, in Stockholm, Tuesday Oct. 6, 2015. Takaaki Kajita of Japan and Arthur McDonald of Canada won the Nobel Prize in physics for the discovery of neutrino oscillations. The Royal Swedish Academy of Sciences said the two researchers had made key contributions to experiments showing that neutrinos change identities. (Fredrik Sandberg/TT via AP) SWEDEN OUT  (The Associated Press)

Takaaki Kajita of Japan and Arthur McDonald of Canada have won the Nobel Prize in physics for the discovery of neutrino oscillations.

The Royal Swedish Academy of Sciences said the two researchers had made key contributions to experiments showing that neutrinos change identities.

"The discovery has changed our understanding of the innermost workings of matter and can prove crucial to our view of the universe," the academy said.

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

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

The winners will split the 8 million Swedish kronor (about $960,000) prize money. Each winner also gets a diploma and a gold medal at the prize ceremony on Dec. 10.