Measurement of the Total Active ${}^{8}B$ Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity

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3 May 2004

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 92 (18) , 181301
https://doi.org/10.1103/physrevlett.92.181301

Abstract

The Sudbury Neutrino Observatory has precisely determined the total active (

ν_{x}

)

{}^{8}B

solar neutrino flux without assumptions about the energy dependence of the

ν_{e}

survival probability. The measurements were made with dissolved NaCl in heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be

5.21 \pm 0.27 (stat) \pm 0.38 (syst) \times 10^{6} {cm}^{- 2} s^{- 1}

, in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields

Δ m^{2} = {7.1}_{- 0.6}^{+ 1.2} \times 10^{- 5} {eV}^{2}

and

θ = {32.5}_{- 2.3}^{+ 2.4}

degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.

Keywords

NEUTRAL CURRENT

All Related Versions

Version 1, 2003-09-07, ArXiv

This publication has 21 references indexed in Scilit:

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Measurement of the Total ActiveB8Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity

Abstract

Keywords

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Measurement of the Total Active ${}^{8}B$ Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity