Other
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvd..75g3011r&link_type=abstract
Physical Review D, vol. 75, Issue 7, id. 073011
Other
3
Neutrino Mass And Mixing, Solar Neutrinos, Solar Interior, Time Series Analysis, Time Variability
Scientific paper
The time series of the B8 solar neutrino measurements released by the Super- Kamiokande and SNO Collaborations have been recently investigated by several groups for possible modulation signatures through standard Fourier-based techniques. In this work we present an alternative analysis of the same data sets based on the wavelet approach, whose key advantage with respect to the traditional methodologies is the ability to capture and follow the time evolution of transient modulation features as well. Moreover, we show the results of the wavelet analysis applied to the mean solar magnetic field and flare index data recorded in the same data-taking period of the two experiments, with the goal of carrying out a direct check of the concurrent presence (if any) of evidence for corresponding time variations in the solar data and in the solar neutrino series. The main outcomes of this investigation are, on one hand, the clear identification of the expected annual modulation variation due to the eccentricity of the Earth’s orbit, and on the other, the demonstration that no further reliable time variation signals can be unraveled, within the current experimental sensitivity, in the measured solar neutrino flux.
Ranucci Gioacchino
Sello Stefano
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