νμ Disappearance Results in Summer 2011
νμ disappearance analysis was performed based on 1.43×1020 p.o.t. We observed 31 single-ring muon-like events at Super-Kamiokande while 104 events are expected without the oscillation scenario. No oscillation hypothesis is excluded at 4.5σ. An allowed region of sin2(2θ23) and Δm223 is obtained to be sin2(2θ23) > 0.85 and 2.1×10-3 < Δm223(eV2) < 3.1×10-3 at 90% C.L.
More details can be found in PRD85,031103(2012) and
arXiv:1201.1386.
Reconstructed energy of neutrinos which were detected at SK and passed the event selection. The black circles with error bars correspond to the data, while the histograms represent the expected spectra for the no oscillation scenario (blue dotted one) and for the oscillation scenario with the best fit parameters (red solid one).
Allowed region of sin2(2θ23) and Δm223 obtained by T2K (red solid and dotted line). The results of MINOS (blue line) and SK (magenta and blown lines) are also presented.