Search for time modulations in the Gallex/GNO solar neutrino data

Abstract

The final data of the Gallex and GNO radiochemical experiments have been searched for possible time modulations of the solar neutrino capture rate using the Lomb-Scargle periodogram and the maximum likelihood methods. Both analyses, performed using the raw data, do not support the presence of a time variability with characteristic periods resembling those of rotation of the solar magnetic fields, as previously suggested in the literature by some authors. In this context, the potential sensitivity of the Lomb-Scargle method to radiochemical 71Ga data has also been explored with simulated data. This allowed to set an exclusion plot in the frequency/amplitude plane from the Gallex-GNO dataset.

12 pages, 7 figures

References in corpus (5)

• Analysis of Super-Kamiokande 5-day Measurements of the Solar Neutrino Flux
• Time-Series Analysis of Super-Kamiokande Measurements of the Solar Neutrino Flux
• Further Evidence for Neutrino Flux Variability from Super-Kamiokande Data
• A Search for Periodicity in the Super-Kamiokande Solar Neutrino Flux Data
• Joint Time-Series Analysis of Homestake and GALLEX-GNO Solar Neutrino Data: Evidence for Rieger-Type Periodicities and their Interpretation as R-Mode Oscillations

Cited by in corpus (12)

• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Complete results for five years of GNO solar neutrino observations
• Solar structure and evolution
• A Search for Periodicities in the ${}^8$B Solar Neutrino Flux Measured by the Sudbury Neutrino Observatory
• Seasonal Modulation of the ${}^7$Be Solar Neutrino Rate in Borexino
• Evidence for Solar Neutrino Flux Variability and its Implications
• Comparative analysis of Gallex and GNO solar neutrino data
• Light sterile neutrinos, spin flavour precession and the solar neutrino experiments
• Independent determination of the Earth's orbital parameters with solar neutrinos in Borexino
• Anomalies in Radioactive Decay Rates: A Bibliography of Measurements and Theory
• Remaining inconsistencies with solar neutrinos: can spin flavour precession provide a clue?
• Neutrino-Flux Variability, Nuclear-Decay Variability, and Their Apparent Relationship