Astronomy and Astrophysics – Astrophysics
Scientific paper
1994-04-27
in Solar Modeling, Proceedings of the Workshop on Solar Modeling, Seattle, WA, March 21--24, 1994, eds. J. N. Bahcall and B. B
Astronomy and Astrophysics
Astrophysics
17 pages with figures, **REVISED**uuencoded postscript file, Institute for Advanced Study number AST 94/14
Scientific paper
There are four important facts about solar neutrinos. They are listed in order of importance in this abstract and discussed more in the text of the talk. First, solar neutrinos have been detected in four experiments with approximately the energies and fluxes predicted by the standard solar model, confirming the hypothesis that the energy source for the solar luminosity is the fusion of light elements. Second, the measured event rates are significantl less than the event rates predicted by the combined standard solar and electroweak models in all four experiments. Third, a comparison of the event rates measured in the chlorine experiment (threshold 0.8 Mev) and the neutrino-electron scattering experiment (Kamiokande II, threshold 7.5 MeV) indicates that the deficiency of electron-type neutrinos at the earth is energy dependent, if the rates and the uncertainties in both experiments have been correctly understood. The inference that the deficiency is energy-dependent conflicts with the simplest version of standard electroweak theory. Fourth, experiments are being constructed that have the capabilities to determine conclusively if new neutrino physics is required.
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