Model Independent Information On Solar Neutrino Oscillations

Abstract

We present the results of a Bayesian analysis of solar neutrino data in terms of nu_e->nu_{mu,tau} oscillations, independent from the Standard Solar Model predictions for the solar neutrino fluxes. We show that such a model independent analysis allows to constraint the values of the neutrino mixing parameters in limited regions around the usual SMA, LMA, LOW and VO regions. Furthermore, there is a strong indication in favor of large neutrino mixing and large values of Delta m^2 (LMA region). We calculate also the allowed ranges of the neutrino fluxes and we show that they are in good agreement with the Standard Solar Model prediction. In particular, the ratio of the 8B flux with its Standard Solar Model prediction is constrained in the interval [0.45,1.42] with 99.73% probability. Finally, we show that the hypothesis of no neutrino oscillations is strongly disfavored in a model independent way with respect to the hypothesis of neutrino oscillations.

40 pages, 20 figures. Added references and improved figures

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• Constraining Majorana neutrino electromagnetic properties from the LMA-MSW solution of the solar neutrino problem
• Neutrinos Vis-a-vis the Six-Dimensional Standard Model
• Robust signatures of solar neutrino oscillation solutions
• Does the Sun Shine by pp or CNO Fusion Reactions?
• Global Analysis of Solar Neutrino and KamLAND Data
• If sterile neutrinos exist, how can one determine the total solar neutrino fluxes?
• Direct determination of the solar neutrino fluxes from solar neutrino data
• Global analysis of Solar neutrino oscillation evidence including SNO and implications for Borexino
• Neutrino Mixing and Leptogenesis in Type-II Seesaw Scenarios with Left-Right Symmetry
• The solar neutrino puzzle: present situation and future scenarios
• Testing the Stability of the Solar Neutrino LMA Solution with a Bayesian Analysis
• Global analysis of solar neutrinos (assumed to be Majorana particles) together with the new KamLAND data