Hyper-Kamiokande

The Hyper-Kamiokande or Hyper-K, as a straightforward extension of the Super-Kamiokande, will provide major new capabilities to make new discoveries in particle and astroparticle physics thanks to an order of magnitude increase in detector mass and improvements in photon-detection system along with the envisioned J-PARC Megawatt-class neutrino beam. The Hyper-K and J-PARC neutrino beam measurement of neutrino oscillation is more likely to provide a 5-sigma discovery of CP violation than any other existing experiment. Hyper-K will also be the world leader for nucleon decays. The sensitivity to the partial lifetime of protons for the decay modes of p→ e⁺ π⁰ is expected to exceed 10³⁵ years. Finally, the astrophysical neutrino program involves precision measurement of solar neutrinos and their matter effects, high-statistical Supernova burst and Supernova relic neutrinos. The Hyper-K is a priority project listed in the Roadmap2017 of the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT). The principal project milestones include: Construction to start as early as in 2019, and Start data taking in 2026.