Implications of Super-Kamiokande atmospheric low-energy data for solar neutrino oscillations

Abstract

It is shown that the high-Delta m2 part of the large mixing angle MSW solution of the solar neutrino problem is disfavored by the Super-Kamiokande data for low-energy upward-going events. A quantitative bound is obtained in the three-neutrino scheme with a negligibly small element Ue3 of the neutrino mixing matrix, as indicated by the result of the CHOOZ long-baseline antinue->antinue oscillation experiment.

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