Nuclear Physics and Atomic Energy


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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Nucl. Phys. At. Energy 2017, volume 18, issue 4, pages 303-312.
Section: Nuclear Physics.
Received: 27.09.2017; Accepted: 28.12.2017; Published online: 20.02.2018.
PDF Full text (en)
https://doi.org/10.15407/jnpae2017.04.303

Joint analysis of Borexino and SNO solar neutrino data and reconstruction of the survival probability

Francesco Vissani1,2*

1 INFN - Laboratori Nazionali del Gran Sasso, Assergi (AQ), Italy
2 Gran Sasso Science Institute, LAquila (AQ), Italy


*Corresponding author. E-mail address: francesco.vissani@lngs.infn.it

Abstract: Solar neutrino oscillations are supported by KamLANDs 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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