Summary of the Latest Results and Future Prospects from the T2K Experiment

[摘要] The T2K long-baseline experiment is located in Japan and is designed to study oscillations of muon neutrinos. T2K obtains a beam of muon neutrinos peaked at 0.6 GeV that are produced at J-PARC accelerator complex by converting a beam of 30-GeV protons hitting a graphite target. Upon traveling 295 km, neutrinos are detected by the Super-Kamiokande (SK) water Cherenkov detector. Located at 280 m from the target, the near detector complex (ND280) provides information about un-oscillated neutrino flux, beam stability and interaction cross-sections. The T2K experiment observed electron neutrino appearance at SK with the significance of 7.3σ and measured the associated oscillation parameter θ13for both normal and inverted mass hierarchies. In addition, by looking at muon neutrino disappearance T2K provided improved measurements of the θ23and Δm232parameters. The results of these measurements are presented as well as a brief summary of the selected neutrino cross-section measurements. Future prospects of the T2K experiment are discussed.

[发布机构] Postdoctoral Fellow, Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver; BC; V6T 1Z1, Canada^1

[关键词] Accelerator complex;Cross-section measurement;Electron neutrino;Future prospects;Graphite target;Long-baseline experiments;Oscillation parameters;Water Cherenkov detectors