Speaker
Description
Tokai-to-Kamioka (T2K) is a long baseline neutrino oscillation experiment in Japan. A (anti-)muon neutrino beam with energy peak ~0.6GeV is produced at Japan Proton Accelerator Research Complex (J-PARC) in Tokai, propagates through 295km and is observed in the far detector Super-Kamiokande (SK). T2K can perform precise measurements in the muon neutrino disappearance channel, i.e. 𝜃!" and |Δ𝑚"! ! |, as well as search for CP violation in the electron neutrino appearance channel. This talk will introduce the latest oscillation analysis from T2K with 3.77 × 10!# protons on target. As a water Cherenkov detector, SK has a strong discriminating power between electrons and muons produced from neutrino-nucleon interactions and can observe diSerent sources of neutrinos with energy from a few MeV to a few hundred GeV. The atmospheric neutrino events observed at SK with various baseline lengths and the Earth matter eSect give SK additional sensitivity to the neutrino mass ordering. A joint oscillation analysis between the T2K beam and SK atmospheric neutrinos has the potential to break the degeneracy of 𝛿$% and mass ordering. In addition to the latest T2K results, this talk will also present the first oscillation results from the joint analysis.
