New Results from T2K

We report new results from the T2K neutrino oscillation experiment with additional data collected after recovering from damage by the Great East Japan Earthquake of March 11, 2011. With the exposure of 2.56×1020 protons on target, we observe 10 electron neutrino events in a muon neutrino beam with 2.73±0.37 background events estimated for θ13=0, which constitutes the evidence of electron neutrino appearance and θ13≠0. The observation corresponds to 3.2σ excess (p-value=0.08%), and results in for δCP=0 and for normal (inverted) mass hierarchy. This discovery opens the window to explore CP violation in the neutrino sector.