Solar neutrinos before and after KamLAND

Abstract

We use the recently reported KamLAND measurements on oscillations of reactor anti-neutrinos, together with the data of previously reported solar neutrino experiments, to show that: (1) the total 8B neutrino flux emitted by the Sun is 1.00(1±=0.06) (1σ) of the standard solar model (BP00) predicted flux, (2) the KamLAND measurements reduce the area of the globally allowed oscillation regions that must be explored in model fitting by six orders of magnitude in the Δm2 -tan2 θ plane, (3) LMA is now the unique oscillation solution to a CL of 4.7σ, (4) maximal mixing is disfavored at 3.1σ, (5) active-sterile admixtures are constrained to sin2 η ≤ 0.13 at 1σ, (6) the observed 8B flux that is in the form of sterile neutrinos is 0.00 -0.00+0.09 (1σ), of the standard solar model (BP00) predicted flux, and (7) non-standard solar models that were invented to avoid completely solar neutrino oscillations are excluded by KamLAND plus solar data at 7.9σ. We also refine quantitative predictions for future 7Be and p - p solar neutrino experiments. © SISSA/ISAS 2003.