Neutrino Oscillations: Present Status

• Results shown to this point are cross-checked and consistent across multiple observables

• Two mass-squared differences seen

• sign known for smaller (solar) ¢m2 due to matter effects

• Involvement of three generations

• Consistent with a full three-generation neutrino mixing

• 3 × 3 mixing matrix (Pontecorvo-Maki-Nakagawa-Sakata)

• One more possible ¢m2, with a known value: