On the Solar Neutrino Problems, SNO experimental data and low-energy nuclear forces
Abstract
The Solar Neutrino Problems (SNP's) are analysed within the Standard Solar Model (BP2000) supplemented by the reduction of the solar neutrino fluxes through the decrease of the solar core temperature. The former can be realized through the enhancement of the astrophysical factor for solar proton burning. The enhancement, the upper bound of which is restricted by the helioseismological data, goes dynamically due to low-energy nuclear forces described at the quantum field theoretic level. The agreement of the reduced solar neutrino fluxes with the experimental data is obtained within the scenario of vacuum two-flavour neutrino oscillations. We show that by fitting the mean value of the solar neutrino flux measured by HOMESTAKE Collaboration we predict the high energy solar neutrino flux measured by SNO Collaboration Phi(SNO(Boron))th = 1.84 X 106 cm(-2) s(-1) in good agreement with the experimental value Phi(SNO(Boron))exp = 1.75(0.14) X 106 cm(-2) s(-1) obtained via the measurement of the rate of reaction nue + D -> p + p + electron produced by boron solar neutrinos. The theoretical flux for low-energy neutrino flux measured by GALLIUM (GALLEX, GNO and SAGE) Collaborations S(Ga)th = 65 SNU agrees with the experimental data averaged over experiments S(Ga)exp = 75.6(4.8) SNU.
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