Masashi Yokoyama, Ken Sakashita and Masato Shiozawa (Japan) Experiment T2K and Hyper-Kamiokande Project
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Среда 24 Апрель 2019, 15:00 - 17:00
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1."Status and future prospect of T2K experiment with J-PARC neutrino beam
and near detectors"
Masashi Yokoyama (University of Tokyo) and Ken Sakashita (KEK and J-PARC)
The T2K experiment is an accelerator based long baseline neutrino
oscillation experiment which produces a muon neutrino beam at J-PARC,
Japan Proton Accelerator Research complex and detect the neutrinos by the
Super-Kamiokande detector at 295km from J-PARC. In the J-PARC site, near
detectors are located to characterize the neutrino beam and its
interaction in detail.
T2K has been leading the world study of neutrino oscillation for the past
decade; we have reported the first observation of muon to electron-type
neutrino oscillation and the first hint of CP violation in the lepton
sector. In order to further enhance the physics capability and to lay
foundations for the future experiment with Hyper-Kamiokande, upgrades the
neutrino beam and near detectors are planned. The latest results and the
future prospect will be presented.

2."The Hyper-Kamiokande project"
Masato Shiozawa (Institute for Cosmic Ray Research, 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+pi^0 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
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