Abstract
T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment designed to measure (anti)neutrino flavor oscillations using an off-axis (anti)neutrino beam. The most recent oscillation results, obtained with an exposure of 1.5(1.3)×1021 protons on target in neutrino (antineutrino) mode are reported. The 2σ confidence interval for the CP-violating phase, δCP, does not include the CP-conserving cases (δCP=0,π). The best-fit values of the other parameters are sin2θ23=0.536−0.046+0.031(sin2θ23=0.536−0.041+0.031) and Δm322/10−3=2.434−0.072+0.073eV2/c4 (Δm132/10−3=2.410−0.071+0.070eV2/c4) for normal (inverted) ordering.One of the largest systematic uncertainties in neutrino oscillation analysis comes from neutrino interaction uncertainty. The T2K Collaboration has a wide cross section measurements program and the most recent results are discussed.
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