Seminars IFIC

Severo Ochoa Seminar: The Hyper-Kamiokande project

by Masato Shiozawa (ICRR, Tokyo)

Salón de Actos (IFIC)

Salón de Actos


Paterna (Valencia)


Part I: "The Hyper-Kamiokande project”

Masato Shiozawa (Project Leader of Hyper-Kamiokande)
Shigetaka Moriyama (Technical Coordinator)
Kamioka Observatory, Institute for Cosmic Ray Research, The University of Tokyo

The Super-Kamiokande detector has been providing fascinating results in
particle physics and astrophysics over more than 20 years, most notably
the discovery of neutrino oscillation which was awarded the 2015 Nobel
Prize in Physics. 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 10^35
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 expected to
start operation in 2027.

Part II: "Long-baseline program of Hyper-Kamiokande with J-PARC neutrino beam”

Masaki Ishitsuka (Hyper-Kamiokande physics WG convener)
Tokyo University of Science

Hyper-Kamiomande (HK) is a next generation multi-purpose large-scale water Cherenkov detector. Among the broad physics program of HK, one major target is a search of as-yet unmeasured CP violation in neutrino sector by the long-baseline project. HK will act as the far detector to measure neutrino beam produced at J-PARC, 295km away from HK. 500kW proton beam at J-PARC, which is producing high intensity neutrino beam for T2K, will be upgraded to 1.3MW for HK. The combination of HK and 1.3MW beam will provide unprecedented high statistics of the neutrino and antineutrino signals to measure the CP violation and reveal a full picture of neutrino mixing. In order to minimize the systematic uncertainties due to the modeling of the neutrino flux and interactions, a suite of new near detectors is planned by international collaboration. This talk will highlight the prospects of HK long-baseline project and the challenge of the near detectors, including a new intermediate Water Cherenkov detector.