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Measurement of the nu(e) and total B-8 solar neutrino fluxes with the Sudbury neutrino observatory phase I data set.

Aharmim, B. and Kormos, Laura L. (2007) Measurement of the nu(e) and total B-8 solar neutrino fluxes with the Sudbury neutrino observatory phase I data set. Physical Review C, 75. 045502. ISSN 0556-2813

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Abstract

This article provides the complete description of results from the Phase I data set of the Sudbury Neutrino Observatory (SNO). The Phase I data set is based on a 0.65 kiloton-year exposure of 2H2O (in the following denoted as D2O) to the solar 8B neutrino flux. Included here are details of the SNO physics and detector model, evaluations of systematic uncertainties, and estimates of backgrounds. Also discussed are SNO's approach to statistical extraction of the signals from the three neutrino reactions (charged current, neutral current, and elastic scattering) and the results of a search for a day-night asymmetry in the e flux. Under the assumption that the 8B spectrum is undistorted, the measurements from this phase yield a solar e flux of (e)=1.76(stat.)(syst.)×106 cm-2 s-1 and a non-e component of (µ)=3.41(stat.)(syst.)×106 cm-2 s-1. The sum of these components provides a total flux in excellent agreement with the predictions of standard solar models. The day-night asymmetry in the e flux is found to be Ae=7.0±4.9(stat.)%(syst.), when the asymmetry in the total flux is constrained to be zero.

Item Type: Article
Journal or Publication Title: Physical Review C
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 18653
Deposited By: ep_ss_importer
Deposited On: 29 Oct 2008 16:42
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:20
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18653

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