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Title: Search for periodicities in the experimental solar neutrino data: A wavelet approach

Abstract

The time series of the {sup 8}B solar neutrino measurements released by the Super- Kamiokande and SNO Collaborations have been recently investigated by several groups for possible modulation signatures through standard Fourier-based techniques. In this work we present an alternative analysis of the same data sets based on the wavelet approach, whose key advantage with respect to the traditional methodologies is the ability to capture and follow the time evolution of transient modulation features as well. Moreover, we show the results of the wavelet analysis applied to the mean solar magnetic field and flare index data recorded in the same data-taking period of the two experiments, with the goal of carrying out a direct check of the concurrent presence (if any) of evidence for corresponding time variations in the solar data and in the solar neutrino series. The main outcomes of this investigation are, on one hand, the clear identification of the expected annual modulation variation due to the eccentricity of the Earth's orbit, and on the other, the demonstration that no further reliable time variation signals can be unraveled, within the current experimental sensitivity, in the measured solar neutrino flux.

Authors:
;  [1];  [2]
  1. Istituto Nazionale di Fisica Nucleare, Via Celoria 16, 20133 Milan (Italy)
  2. (Italy)
Publication Date:
OSTI Identifier:
21020248
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.073011; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BORON 8; CAPTURE; MAGNETIC FIELDS; MODULATION; NEUTRINO DETECTION; NEUTRINO REACTIONS; PERIODICITY; SENSITIVITY; SOLAR NEUTRINOS

Citation Formats

Ranucci, Gioacchino, Sello, Stefano, and Mathematical and Physical Models-Enel Research, Via Andrea Pisano 120, 56122 Pisa. Search for periodicities in the experimental solar neutrino data: A wavelet approach. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.073011.
Ranucci, Gioacchino, Sello, Stefano, & Mathematical and Physical Models-Enel Research, Via Andrea Pisano 120, 56122 Pisa. Search for periodicities in the experimental solar neutrino data: A wavelet approach. United States. doi:10.1103/PHYSREVD.75.073011.
Ranucci, Gioacchino, Sello, Stefano, and Mathematical and Physical Models-Enel Research, Via Andrea Pisano 120, 56122 Pisa. Sun . "Search for periodicities in the experimental solar neutrino data: A wavelet approach". United States. doi:10.1103/PHYSREVD.75.073011.
@article{osti_21020248,
title = {Search for periodicities in the experimental solar neutrino data: A wavelet approach},
author = {Ranucci, Gioacchino and Sello, Stefano and Mathematical and Physical Models-Enel Research, Via Andrea Pisano 120, 56122 Pisa},
abstractNote = {The time series of the {sup 8}B solar neutrino measurements released by the Super- Kamiokande and SNO Collaborations have been recently investigated by several groups for possible modulation signatures through standard Fourier-based techniques. In this work we present an alternative analysis of the same data sets based on the wavelet approach, whose key advantage with respect to the traditional methodologies is the ability to capture and follow the time evolution of transient modulation features as well. Moreover, we show the results of the wavelet analysis applied to the mean solar magnetic field and flare index data recorded in the same data-taking period of the two experiments, with the goal of carrying out a direct check of the concurrent presence (if any) of evidence for corresponding time variations in the solar data and in the solar neutrino series. The main outcomes of this investigation are, on one hand, the clear identification of the expected annual modulation variation due to the eccentricity of the Earth's orbit, and on the other, the demonstration that no further reliable time variation signals can be unraveled, within the current experimental sensitivity, in the measured solar neutrino flux.},
doi = {10.1103/PHYSREVD.75.073011},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}