T2K releases its first measurement of muon-antineutrino disappearance

T2K released its first measurement of muon-antineutrino disappearance in a seminar at the KEK High Energy Accelerator Research Organization on 18th May 2015. This result has been obtained from data taken from May 2014 – March 2015. During this time, T2K has been running with a beam composed mostly of muon antineutrinos, and 59.8 events…

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J-PARC delivers 1×1021 protons on target to T2K

Today (March 26, 2015) at 15:25 the J-PARC accelerator achieved the milestone of delivering 1×1021 protons on target to T2K. Many thanks are due to the J-PARC directorate and the staff members for their outstanding work to make this possible ! The protons are produced by J-PARC in Tokai on the east coast of Japan.…

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Takashi Kobayashi is awarded the Yomiuri Gold Medal

Takashi Kobayashi has been awarded the Yomiuri Gold Medal for his contributions to the discovery of oscillations from muon neutrinos to electron neutrinos. He is a professor of physics at the High Energy Accelerator Research Organization (KEK) and is head of the Particle and Nuclear Physics Division at the Japan Proton Accelerator Research Complex (J-PARC).…

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Takashi Kobayashi, Tsuyoshi Nakaya and Masato Shiozawa are awarded the Yoji Totsuka prize

Takashi Kobayashi, Tsuyoshi Nakaya and Masato Shiozawa have been awarded the Yoji Totsuka Prize for their contributions to discovering oscillations from muon neutrinos to electron neutrinos. Takashi Kobayashi is a professor of physics at the High Energy Accelerator Research Organization (KEK) and is head of the Particle and Nuclear Physics Division at the Japan Proton…

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Takashi Kobayashi and Tsuyoshi Nakaya are awarded the Nishina Memorial Prize

Takashi Kobayashi and Tsuyoshi Nakaya have been awarded the Nishina Memorial Prize for 2014 for their contributions to discovering oscillations from muon neutrinos to electron neutrinos. Takashi Kobayashi is a professor of physics at the High Energy Accelerator Research Organization (KEK) and is a Spokesperson for T2K. Tsuyoshi Nakaya is a professor of physics at…

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Watch a video about T2K

The T2K Experiment

T2K is a neutrino experiment designed to investigate how neutrinos change from one flavour to another as they travel (neutrino oscillations). An intense beam of muon neutrinos is generated at the J-PARC nuclear physics site on the East coast of Japan and directed across the country to the Super-Kamiokande neutrino detector in the mountains of western Japan. The beam is measured once before it leaves the J-PARC site, using the near detector ND280, and again at Super-K: the change in the measured intensity and composition of the beam is used to provide information on the properties of neutrinos.

Map showing J-PARC and Super-K

Science Goals of T2K

  • the discovery of νμ → νe ( i.e. the confirmation that θ13 > 0 )
  • precision measurements of oscillation parameters in νμ disappearance
  • a search for sterile components in νμ disappearance by observation of neutral-current events
  • world-leading contributions to neutrino-nucleus cross-section measurements