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Takaaki Kajita

From Wikipedia, the free encyclopedia
Japanese physicist

Takaaki Kajita
梶田 隆章
Kajita in 2017
Born (1959-03-09)9 March 1959 (age 66)
EducationSaitama Prefectural Kawagoe High School
Alma materSaitama University (BS)
University of Tokyo (MS,PhD)
SpouseMichiko
AwardsAsahi Prize (1988)
Bruno Rossi Prize (1989)
Nishina Memorial Prize (1999)
Panofsky Prize (2002)
Japan Academy Prize (2012)
Nobel Prize in Physics (2015)
Breakthrough Prize in Fundamental Physics (2016)
Scientific career
InstitutionsKavli Institute for the Physics and Mathematics of the Universe,University of Tokyo
Doctoral advisorMasatoshi Koshiba
Other academic advisorsYoji Totsuka

Takaaki Kajita (梶田 隆章,Kajita Takaaki;Japanese pronunciation:[kadʑitatakaːki]; born 9 March 1959) is a Japanesephysicist, known forneutrino experiments at theKamioka Observatory –Kamiokande and its successor,Super-Kamiokande. In 2015, he was awarded theNobel Prize in Physics jointly with Canadian physicistArthur B. McDonald. On 1 October 2020, he became the president of theScience Council of Japan.

Early life and education

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Kajita was born in 1959 inHigashimatsuyama, Saitama, Japan.[1] He liked studying thought rather than memorizing, especially with interest inphysics,biology,world history,Japanese history, andearth science in high school. He studied physics atSaitama University and graduated in 1981. He received hisdoctorate in 1986 at theUniversity of Tokyo.[2] At the University of Tokyo, he joinedMasatoshi Koshiba's research group because neutrinos "seemed like they might be interesting."

Career and research

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Since 1988, Kajita has been at the Institute for Cosmic Radiation Research, University of Tokyo, where he became an assistant professor in 1992 and professor in 1999.[3]

He became director of the Center for Cosmic Neutrinos at theInstitute for Cosmic Ray Research (ICRR) in 1999. As of 2017[update], he is a Principal Investigator at theInstitute for the Physics and Mathematics of the Universe in Tokyo, and Director of ICRR.[4]

In 1998, Kajita's team at theSuper-Kamiokande found that whencosmic rays hit the Earth's atmosphere, the resulting neutrinos switched between two flavours before they reached the detector under Mt. Kamioka.[2][5] This discovery helped prove the existence ofneutrino oscillation and that neutrinos have mass. In 2015, Kajita shared theNobel Prize in Physics with Canadian physicistArthur McDonald, whoseSudbury Neutrino Observatory discovered similar results.[5] Kajita's and McDonald's work solved the longstandingSolar neutrino problem, which was a major discrepancy between the predicted and measured Solar neutrino fluxes, and indicated that theStandard Model, which required neutrinos to be massless, had weaknesses.[5] In a news conference at the University of Tokyo, shortly after the Nobel announcement, Kajita said, "I want to thank the neutrinos, of course. And since neutrinos are created by cosmic rays, I want to thank them, too."[6]

One of the first people Kajita called after receiving the Nobel Prize was 2002 Nobel physics laureateMasatoshi Koshiba, his former mentor and a fellow neutrino researcher.[2]

Kajita is currently theprincipal investigator of another ICRR project located at theKamioka Observatory, theKAGRAgravitational wave detector.[7]

Recognition

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Kajita at a press conference at theRoyal Swedish Academy of Sciences, 2015

Awards

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Honors

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See also

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References

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  1. ^"Takaaki Kajita - Facts".Nobel Foundation. 6 October 2015. Retrieved6 October 2015.
  2. ^abc"Japan's Takaaki Kajita shares Nobel in physics".Japan Times. 6 October 2015. Retrieved7 October 2015.
  3. ^"2015 Nobel Prize in Physics: Canadian Arthur B. McDonald shares win with Japan's Takaaki Kajita".CBC News. 6 October 2015. Retrieved6 October 2015.
  4. ^"About ICRR". Institute for Cosmic Ray Research, University of Tokyo. Archived fromthe original on 9 October 2015. Retrieved6 October 2015.
  5. ^abcRanderson, James and Ian Sample (6 October 2015)."Kajita and McDonald win Nobel physics prize for work on neutrinos".The Guardian. Retrieved6 October 2015.
  6. ^Overbye, Dennis (6 October 2015)."Takaaki Kajita and Arthur McDonald Share Nobel in Physics for Work on Neutrinos".New York Times. Retrieved6 October 2015.
  7. ^"Professor Kajita won the novel prize in physics !!" (Press release). KAGRA collaboration. 7 October 2015.Professor Kajita, who is the PI of KAGRA, won the Nobel prize in physics !!
  8. ^"Recipients of the Asahi Prize".Asahi Shimbun. Retrieved12 August 2016.
  9. ^"HEAD AAS Rossi Prize Winners". Home High Energy Astrophysics Division. Retrieved12 August 2016.
  10. ^"Recipients of the Asahi Prize".Asahi Shimbun. Retrieved12 August 2016.
  11. ^"Recipients of Nishina Memorial Prizes".Nishina Memorial Foundation. Retrieved12 August 2016.
  12. ^"2002 W.K.H. Panofsky Prize in Experimental Particle Physics Recipient".American Physical Society. Retrieved12 August 2016.
  13. ^"第１回「戸塚洋二賞」選考結果". Heisei Foundation for Basic Science. 24 February 2012. Archived fromthe original on 6 March 2016. Retrieved17 November 2015.(in Japanese)
  14. ^"The Imperial Prize, Japan Academy Prize, Duke of Edinburgh Prize Recipients".Japan Academy. 4 June 2012. Retrieved12 August 2016.
  15. ^"Japan Academy Prize to – Takaaki Kajita"(PDF).Japan Academy. 4 June 2012. Retrieved12 August 2016.
  16. ^"Julius Wess Award to Takaaki Kajita".Kavli IPMU-カブリ数物連携宇宙研究機構.Kavli Institute for the Physics and Mathematics of the Universe. 27 November 2013. Archived fromthe original on 18 November 2015. Retrieved17 November 2015.
  17. ^"The Nobel Prize in Physics 2015".. Nobelprize.org. Nobel Media AB 2014. Web. 6 October 2015.
  18. ^"Breakthrough Prize Awarded $22 Million In Science Prizes" (Press release). San Francisco: Fundamental Physics Prize. 8 November 2015.
  19. ^"The Asian Scientist 100".Asian Scientist. Retrieved13 March 2025.
  20. ^Azeem, Ahmad (November 2016)."Nobel Laureate Takaaki Kajita conferred DSc at AMU's 64th convocation".India Today. Retrieved1 November 2016.
  21. ^"Padova University, laurea honors causa al Premio Nobel Takaaki Kajita". 9 September 2016. Retrieved13 March 2024.
  22. ^"Kajita: Emociones de la ciencia esperan a los jóvenes bolivianos". Página Siete. 3 May 2016. Retrieved10 October 2019.
  23. ^"Federico II, laurea honors causa al Premio Nobel Takaaki Kajita". Il Mattino. 30 January 2017. Retrieved10 October 2019.
  24. ^"Honors". University of Bern. 2017. Archived fromthe original on 8 January 2018. Retrieved10 October 2019.
  25. ^"Laurea Honoris Causa a Takaaki Kajita".Bacheca. University of Perugia. 2017. Archived fromthe original on 5 October 2021. Retrieved4 October 2021.
  26. ^"University of Glasgow Honorary Degrees 2024".www.gla.ac.uk. Retrieved30 October 2024.

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