Solar neutrino data and their implications

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Abstract
The complete and concurrent Homestake and Kamiokande solar neutrino data sets (including backgrounds), when compared to detailed model predictions, provide no unambiguous indication of the solution to the solar neutrino problem. All neutrino-based solutions, including time-varying models, provide reasonable fits to both the 3-yr concurrent data and the full 20-yr data set. A simple constant B neutrino flux reduction from the standard solar model mean prediction is ruled out at greater than the 4σ level for both data sets. While such a flux reduction provides a marginal fit to the unweighted averages of the concurrent data, it does not provide a good fit to the average of the full 20-yr sample. Gallium experiments may not be able to distinguish between the currently allowed neutrino-based possibilities.
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