Measurement of the total active B-8 solar neutrino flux at the Sudbury Neutrino Observatory with enhanced neutral current sensitivity

Ahmed, S N, Peeters, Simon, Zuber, Kai and SNO Collaboration, (2004) Measurement of the total active B-8 solar neutrino flux at the Sudbury Neutrino Observatory with enhanced neutral current sensitivity. Physical Review Letters, 92 (18). pp. 1813011-6. ISSN 0031-9007

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Abstract

The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) B-8 solar neutrino flux without assumptions about the energy dependence of the nu(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+/-0.27(stat)+/-0.38(syst)x10(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 Deltam(2)=7.1(-0.6)(+1.2)x10(-5) eV(2) and theta= 32.5(-2.3)(+2.4) degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.

Item Type: Article
Additional Information: This paper is the confirmation on the flavour change of solar neutrinos on their way to earth. I contributed to the running of the experiment and completed a low-energy background analysis, the analysis of the most important physics background of this experiment.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Simon Peeters
Date Deposited: 06 Feb 2012 19:22
Last Modified: 10 Mar 2017 15:55
URI: http://sro.sussex.ac.uk/id/eprint/20323

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