Papers › Generalized Lomb-Scargle Analysis of 22 years of Super-Kamiokande solar ⁸B neutrino data
Generalized Lomb-Scargle Analysis of 22 years of Super-Kamiokande solar ⁸B neutrino data
Vibhavasu Pasumarti, Shantanu Desai
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We apply the generalized Lomb-Scargle periodogram to 22 years data of solar ⁸B neutrino fluxes detected by Super-Kamiokande. The primary motivation of this work was to check if the sinusoidal modulation at a frequency of 9.43/year (with a period of 38 days), which we had found to be marginally significant with the first five years of Super-K data, persists, with the accumulated data. We use four different metrics for the calculation of significance. We do not find any evidence for periodicity at the aforementioned frequency or any other frequency with the updated data. Therefore the marginally detected periodicity at 9.43/year with the first five years of data was only a statistical fluctuation.
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