J-PARCでの長基線ニュートリノ振動実験の新たな展開

抄録

High intensity proton synchrotrons enable long-baseline neutrino experiments precisely to measure the oscillation probability of the neutrino oscillation phenomenon discovered in 1998. Furthermore, it become possible to search for the particle–antiparticle difference (CP violation) in leptons experimentally by comparing the magnitude of neutrino oscillations between neutrinos and antineutrinos. The recent results from the T2K experiment using J-PARC and Super-Kamiokande show the hints of large CP violation in neutrino oscillations, and provide the first strong limit on the CP violating complex phase. The construction of the Hyper-Kamiokande experiment that aims to detect and measure CP violation in neutrino oscillations in next decade has also started.