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Title: Periodogram and likelihood periodicity search in the SNO solar neutrino data

Abstract

In this work a detailed spectral analysis for the periodicity search of the time series of the {sup 8}B solar neutrino flux released by the SNO Collaboration is presented. The data have been publicly released with truncation of the event times to the unit of day (1 day binning); they are thus suited to undergo the traditional Lomb-Scargle analysis for periodicity investigation, as well as an extension of such a method based on a likelihood approach. The results of the analysis presented here confirm the absence of modulation signatures in the SNO data. For completeness, a more refined ''1 day binned'' likelihood is also illustrated, which approximates the unbinned likelihood methodology, based upon the availability of the full time information, adopted by the SNO collaboration. Finally, this work is completed with two different joint analyses of the SNO and Super-Kamiokande data, respectively, over the common and the entire data taking periods. While both analyses reinforce the case of the constancy of the neutrino flux, the latter in addition provides evidence of the detection at the 99.7% confidence level of the annual modulation spectral line due to the Earth's orbit eccentricity around the Sun.

Authors:
;  [1]
  1. Istituto Nazionale di Fisica Nucleare, Via Celoria 16, 20133 Milan (Italy)
Publication Date:
OSTI Identifier:
20935187
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.75.013010; (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; PERIODICITY; RADIATION DETECTION; SOLAR NEUTRINOS; TIME-SERIES ANALYSIS

Citation Formats

Ranucci, Gioacchino, and Rovere, Marco. Periodogram and likelihood periodicity search in the SNO solar neutrino data. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.013010.
Ranucci, Gioacchino, & Rovere, Marco. Periodogram and likelihood periodicity search in the SNO solar neutrino data. United States. doi:10.1103/PHYSREVD.75.013010.
Ranucci, Gioacchino, and Rovere, Marco. Mon . "Periodogram and likelihood periodicity search in the SNO solar neutrino data". United States. doi:10.1103/PHYSREVD.75.013010.
@article{osti_20935187,
title = {Periodogram and likelihood periodicity search in the SNO solar neutrino data},
author = {Ranucci, Gioacchino and Rovere, Marco},
abstractNote = {In this work a detailed spectral analysis for the periodicity search of the time series of the {sup 8}B solar neutrino flux released by the SNO Collaboration is presented. The data have been publicly released with truncation of the event times to the unit of day (1 day binning); they are thus suited to undergo the traditional Lomb-Scargle analysis for periodicity investigation, as well as an extension of such a method based on a likelihood approach. The results of the analysis presented here confirm the absence of modulation signatures in the SNO data. For completeness, a more refined ''1 day binned'' likelihood is also illustrated, which approximates the unbinned likelihood methodology, based upon the availability of the full time information, adopted by the SNO collaboration. Finally, this work is completed with two different joint analyses of the SNO and Super-Kamiokande data, respectively, over the common and the entire data taking periods. While both analyses reinforce the case of the constancy of the neutrino flux, the latter in addition provides evidence of the detection at the 99.7% confidence level of the annual modulation spectral line due to the Earth's orbit eccentricity around the Sun.},
doi = {10.1103/PHYSREVD.75.013010},
journal = {Physical Review. D, Particles Fields},
number = 1,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}