Plans and Status of Hyper-Kamiokande

Hyper-Kamiokande is a next-generation water Cherenkov detector that will detect neutrinos from terrestrial and astrophysical sources in addition to probing nucleon decay. The accelerator beam neutrino program with the 258 kiloton Hyper-K as the far detector will provide high sensitivity to the unknown parameters of 3-flavour neutrino oscillation physics, especially the leptonic CP phase, \(\delta _{\mathrm {CP}}\). Hyper-K will also detect atmospheric neutrinos that experience Earth matter effects and has sensitivity to neutrino mass hierarchy. The expected sensitivities to \(\Delta {m^2_{32}}\), \(\sin ^2\theta _{23}\), \(\delta _{\mathrm {CP}}\), and neutrino mass hierarchy from accelerator and atmospheric neutrino programs at Hyper-K are discussed here. Hyper-K is currently under construction and the data-taking is expected to commence in 2028. Abstract Published by the Jagiellonian University 2026 authors