AI Article Synopsis
- The study analyzed 5804 days of Super-Kamiokande data from 1996 to 2018 to detect variations in solar ^{8}B neutrino flux.
- The researchers utilized a five-day interval measurement approach and employed maximum likelihood and Lomb-Scargle methods to find any periodic modulations.
- They found a significant modulation related to Earth's elliptical orbit around the Sun, with measurements of eccentricity and perihelion shift aligning with astronomical data.
Article Abstract
We report a search for time variations of the solar ^{8}B 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.
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| http://dx.doi.org/10.1103/PhysRevLett.132.241803 | DOI Listing |
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