A search has been made for sinusoidal periodic variations in the B8 solar neutrino flux using data collected by the Sudbury Neutrino Observatory over a 4-year time interval. The variation at a period of 1 yr is consistent with modulation of the B8 neutrino flux by the Earth's orbital eccentricity. No significant sinusoidal periodicities are found with periods between 1 d and 10 years with either an unbinned maximum likelihood analysis or a Lomb-Scargle periodogram analysis. The data are inconsistent with the hypothesis that the results of the recent analysis by Sturrock et al., based on elastic scattering events in Super-Kamiokande, can be attributed to a 7% sinusoidal modulation of the total B8 neutrino flux.

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Persistent URL dx.doi.org/10.1103/PhysRevD.72.052010
Journal Physical Review D - Particles, Fields, Gravitation and Cosmology
Aharmim, B. (B.), Ahmed, S.N. (S. N.), Anthony, A.E. (A. E.), Beier, E.W. (E. W.), Bellerive, A, Bergevin, M. (M.), … Zuber, K. (K.). (2005). Search for periodicities in the B8 solar neutrino flux measured by the Sudbury Neutrino Observatory. Physical Review D - Particles, Fields, Gravitation and Cosmology, 72(5). doi:10.1103/PhysRevD.72.052010