A study of the solar neutrino survival probability

We present a study of recent solar neutrino data using a Bayesian method. Assuming that only $ν_e$ are observed in the Super-Kamiokande experiment our results show a marked supression of the survival probability at about 1 MeV, in good agreement with $χ^2$-based analyses. When the detection of $ν_μ$ by Super-Kamiokande is taken into account, assuming $ν_e$ to $ν_μ$ oscillations, we find the largest suppression in survival probability at about 8.5 MeV.

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