Dr. Masato Shiozawa (ICRR)
" Hyper-Kamipokande project "
The neutrino together with the Higgs particle are the only elementary particles whose basic properties are still largely unknown. Very large-scale experiments, which will be needed to fully explore the neutrino properties, will also naturally increase the sensitivity of searches for proton decays and have astrophysics potential. Hyper-Kamiokande or Hyper-K is a extension of successful water Cherenkov detector experiment Super-Kamiokande and employs well-proven and high-performance water Cherenkov detector technology. It 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 leptonic CP violation than any other existing experiment. The high-statistical atmospheric neutrino study is expected to determine the order of three neutrino masses. Hyper-K will also be the world leader for nucleon decay searches. This is the only known, realistic detector option capable of reaching the proton lifetime of 10^35 years for the pe+0 mode. Finally, the astrophysical neutrino program involves precision measurement of solar neutrinos and their matter effects, high-statistical Supernova burst and Supernova relic neutrinos.