Super-Kamiokande Solar Neutrino Results and NSI Analysis

Super-Kamiokande (SK) detects the Cerenkov light from elastic scattering of solar 8B neutrinos with electrons in its ultra-pure water. The directionality, energy, and timing of the recoil electrons determines the interaction rate, the flight path, as well as the energy dependence of the 8B neutrinos...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-09, Vol.888 (1), p.12190
Main Author: Weatherly, Pierce
Format: Article
Language:English
Subjects:
Couplings
Elastic scattering
Electrons
Flavor (particle physics)
Physics
Quarks
Solar neutrinos
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Summary:Super-Kamiokande (SK) detects the Cerenkov light from elastic scattering of solar 8B neutrinos with electrons in its ultra-pure water. The directionality, energy, and timing of the recoil electrons determines the interaction rate, the flight path, as well as the energy dependence of the 8B neutrinos' electron-flavor survival probability Pee. While the Pee below 1 MeV is equivalent to averaged vacuum neutrino flavor oscillations, the Pee above 7 MeV is suppressed by the Mikheyev-Smirnov-Wolfenstein (MSW) resonance resulting from the interaction of the solar neutrinos with solar matter. In the same way, Earth matter effects influence Pee, leading to an apparent Day/Night effect. Non-standard interactions (NSI) extend the MSW model to include interactions between the quarks in matter and neutrinos, thereby modifying Pee. We present the signatures of matter effects on solar neutrinos in Super-Kamiokande and present limits on NSI parameters, in particular couplings to the down quark.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/888/1/012190