Low Energy Solar Neutrinos and Spin Flavour Precession

Abstract

The possibility that the Gallium data effectively indicates a time modulation of the solar active neutrino flux in possible connection to solar activity is examined on the light of spin flavour precession to sterile neutrinos as a subdominant process in addition to oscillations. We distinguish two sets of Gallium data, relating them to high and low solar activity. Such modulation affects principally the low energy neutrinos ($pp$ and ${}^{7}Be$) so that the effect, if it exists, will become most clear in the forthcoming Borexino and LENS experiments and will provide evidence for a neutrino magnetic moment. Using a model previously developed, we perform two separate fits in relation to low and high activity periods to all solar neutrino data. These fits include the very recent charged current spectrum from the SNO experiment. We also derive the model predictions for Borexino and LENS experiments.

arXiv comment20 pages, 5 ps figures, 1 eps figure, final version to be published in JHEP

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Cited by in corpus (14)

• The next-generation liquid-scintillator neutrino observatory LENA
• A Search for Periodicities in the ${}^8$B Solar Neutrino Flux Measured by the Sudbury Neutrino Observatory
• Neutrino oscillations in matter and in twisting magnetic fields
• Neutrino electromagnetic interactions: a window to new physics
• Evidence for R-Mode Oscillations in Super-Kamiokande Solar Neutrino Data
• Solar neutrino variability and its implications for solar physics and neutrino physics
• Search for modulations of the solar Be-7 flux in the next-generation neutrino observatory LENA
• SNO+: predictions from standard solar models and spin flavour precession
• ${}^{7}Be$ Neutrino Signal Variation in KamLAND
• Comparative Analysis of Super-Kamiokande and SNO Solar-Neutrino Data and the Photospheric Magnetic Field
• Two Gallium data sets, spin flavour precession and KamLAND
• Neutrino spin-flavor oscillations in solar environment
• Gallium data variability and KamLAND
• Neutrino oscillation in the presence of background classical sources