Abstract

The T2K long baseline neutrino oscillation experiment in Japan uses a muon neutrino (antineutrino) beam produced by J-PARC and propagating through 295 km to the Super-Kamiokande water Cherenkov detector. The most recent oscillation results from T2K for neutrinos and antineutrinos are reported here. Both disappearance and appearance data are analyzed, providing leading results for sin2θ23 and . When fitting using a prior on sin2 2θ13 from reactor measurements, T2K is able to put the first constraints on the CP-violating phase δCP, disfavouring the CP-conserving values 0 and π at 90% C.L. Prospects for the future of T2K are also discussed.

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