Contrasting solar and reactor neutrinos with a non-zero value of θ13

When solar neutrino and KamLAND data are analyzed separately one finds that, even though allowed regions of neutrino parameters overlap, the values of δ m² and the mixing angle θ₁₂ at the χ² minima are different. We show that a non-zero, but small value of the angle θ₁₃ can account for this behavior. From the joint analysis of solar neutrino and KamLAND data we find the best fit value of sin² 2 θ₁₃ = 0.01 -0.01+0.09.