Constraints on neutrino parameters from neutral-current solar neutrino measurements

We generalize the pull approach to define the ${\chi }^2$ function to the analysis of the data with correlated statistical errors. We apply this method to the analysis of the Sudbury Neutrino Collaboration data obtained in the salt phase. In the global analysis of all the solar neutrino and KamLAND data we find the best fit (minimum ${\chi }^2)$ values of neutrino parameters to be ${\tan }^2{\theta }_{12}\sim 0.42$ and $\delta m_{12}^2\sim 7.1\times {10}^{-5}{\mathrm{eV}}^2.$ We confirm that the maximal mixing is strongly disfavored while the bounds on $\delta m_{12}^2$ are significantly strengthened.