Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English, Russian   Periodicity: 4 times per year   Open access peer reviewed journal

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Abstract: Solar neutrino oscillations are supported by KamLAND’s antineutrino measurements, but certain solar neutrino data – the observed shape of the ⁸B flux and the difference between day and night counting rates measured in Super-K – do not fit well with the ensuing oscillation pattern. Interestingly, other solar neutrino data allow independent tests of the survival probability. Thanks to the new measurements of Borexino at low-energies along with the standard solar model and to the results of SNO at high-energies, four values of the neutrino survival probability are known. We build and study a likelihood based only on these solar neutrino data. The results agree well with the standard oscillation pattern and in particular with KamLAND findings. A related and straightforward procedure permits to reconstruct the survival probability of solar neutrinos and to assess its uncertainties, for all solar neutrino energies.

Keywords: solar neutrinos, neutrino oscillations, nuclear astrophysics, pp neutrinos, pep neutrinos, ⁷Be neutrinos, ⁸B neutrinos.

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