Subleading effects in the 1-2 sector: Non-standard neutrino interactions

We have reconsidered the status of the large mixing angle (LMA) oscillation (OSC) interpretation of the solar neutrino data in a more general framework where non-standard neutrino interactions (NSI) are present. Using the latest data from all solar neutrino experiments and KamLAND we have found the existence of three LMA solutions, instead of the unique solution which holds in the absence of NSI, LMA-I. In addition to LMA-I, there is another solution with smaller Δm2 (LMA-0), and a new “dark-side” solution (LMA-D) with sin2θ=0.70. We comment on the potential of KamLAND and future solar neutrino experiments using 7Be and 8B neutrinos to lift the degeneracy between the LMA-I, LMA-0 and LMA-D solutions.