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Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is T₄₅₅=3. 5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 10^6 cm^-2 s^-1, the total flux of active-flavor neutrinos from ^8B decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the ^8B neutrino energy spectrum, is found to be ₍₂=5. 140-₀. ₁₅₈^+0. 160 (stat) -₀. ₁₁₇^+0. 132 (syst). These uncertainties are more than a factor of 2 smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the Sudbury Neutrino Observatory data in which the free parameters directly describe the total ^8B neutrino flux and the energy-dependent ₄ survival probability provides a measure of the total ^8B neutrino flux ^{8B}=5. 046-₀. ₁₅₂^+0. 159 (stat) -₀. ₁₂₃^+0. 107 (syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of ₁₂=34. 06-₀. ₈₄^+1. 16 degrees and m₂₁^2=7. 59-₀. ₂₁^+0. 2010^-5 eV^2. The global value of ^{8B} is extracted to a precision of -₂. ₉₅^+2. 38%. In a three-flavor analysis the best fit value of sin^2₁₃ is 2. 00-₁. ₆₃^+2. 0910^-2. This implies an upper bound of sin^2₁₃<0. 057 (95% C. L. ).
Aharmim et al. (Thu,) studied this question.