Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2001-06-15
Physics
High Energy Physics
High Energy Physics - Experiment
8 pages, 7 figures, to be published in the proceedings of XXXVI th Rencontres de Moriond Electroweak Interactions and Unified
Scientific paper
Super-Kamiokande has measured the solar neutrino flux using elastic neutrino-electron scattering in water. The measured flux is $2.32\pm0.03$(stat)$^{+0.08}_{-0.07}$(syst)$\times10^6$/(cm$^2$s) based on the energy range of 5 to 20 MeV for the recoiling electron. The time-dependence and energy spectrum of the recoiling electrons were studied to search for two-neutrino oscillation signatures. The absence of either significant zenith angle flux variation or distortions of the recoil electron spectrum places strong constraints on neutrino mass difference and mixing. In combination with the flux measurement, two allowed regions at large mixing are found.
Smy Michael Burghard
The Super-Kamiokande Collaboration
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