Estimating Neutrino Mixing Parameters from Solar Neutrino Data

We have numerically computed survival probabilities of solar neutrinos interacting with solar and earth matter via MSW mechanism in the full three generation formalism with Δ m₂₃² { = (0}{.22, 1}{.0, 2}{.2) } × { 10}^{ - 3} { eV}² . We estimate the event rates in the three solar neutrino experiments; Cl, Ga, and water. For θ₁₃ < 30°, we confirm the two regions found in the two generation case, (1) with the most likelyhood, small sin²(2θ₁₂) 0.0055 with Δ m₁₂² { } ∼ { 5}{.4 } × { 10}^{ - 6} { eV}² and θ₁₃ 5°, (2) with less likelyhood, large sin²(2θ₁₂) 0.63 with Δ m₁₂² { } ∼ { 1}{.0 } × { 10}^{ - 4} { eV}² and θ₁₃ 15°. In both cases Δ m₂₃² { = 0}{.22 } × { 10}^{ - 3} { eV}² gives the smaller χ².