Search for Periodic Time Variations of the Solar 8B Neutrino Flux between 1996 and 2018 in Super-Kamiokande



Abe, K, Bronner, C, Hayato, Y, Hiraide, K, Hosokawa, K, Ieki, K, Ikeda, M, Kameda, J, Kanemura, Y, Kaneshima, R
et al (show 226 more authors) (2024) Search for Periodic Time Variations of the Solar 8B Neutrino Flux between 1996 and 2018 in Super-Kamiokande PHYSICAL REVIEW LETTERS, 132 (24). 241803-. ISSN 0031-9007, 1079-7114

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Abstract

We report a search for time variations of the solar B8 neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 calendar years to search for solar neutrino flux modulations with unprecedented precision. Periodic modulations are searched for in a dataset comprising five-day interval solar neutrino flux measurements with a maximum likelihood method. We also applied the Lomb-Scargle method to this dataset to compare it with previous reports. The only significant modulation found is due to the elliptic orbit of the Earth around the Sun. The observed modulation is consistent with astronomical data: we measured an eccentricity of (1.53±0.35)%, and a perihelion shift of (-1.5±13.5) days.

Item Type: Article
Uncontrolled Keywords: Super-Kamiokande Collaboration
Divisions: Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 12 Dec 2024 10:44
Last Modified: 23 May 2026 08:55
DOI: 10.1103/PhysRevLett.132.241803
Open Access URL: https://journals.aps.org/prl/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3189122
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