Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-04-08
JHEP0507:051,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 5 ps figures, 1 eps figure, final version to be published in JHEP
Scientific paper
10.1088/1126-6708/2005/07/051
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.
Chauhan Bhag C.
Pulido Joao
Raghavan Raju S.
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