Solar Neutrinos Almost Independently of Solar Models
Abstract
Recent solar neutrino results together with the assumption of a stationary Sun imply severe constraints on the individual components of the total neutrino flux : Be ≤ 0.7 · 109 cm-2 s-1, CNO ≤ 0.6 · 109 cm-2 s-1 and 64 · 109 cm-2 s-1 ≤ pp+pep ≤ 65 · 109 cm-2 s-1 (at 1 σ level), the constraint on Be being in strong disagreement with BeSSM = 5 · 109 cm-2 s-1. We study a large variety of non-standard solar models with low inner temperatures, finding that the temperature profiles T(m) follow the homology relationship: T(m)=kT(m)SSM, so that they are specified just by the central temperature Tc. There is no value of Tc which can account for all the available experimental results and also if we restrict to consider just Gallium and Kamiokande results the fit is poor. Finally we discuss what can be learned from new generation experiments, planned for the detection of monochromatic solar neutrinos, about the properties of neutrinos and of the Sun.
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