θ13: phenomenology, present status and prospect

Mezzetto, Mauro; Schwetz, Thomas

doi:10.1088/0954-3899/37/10/103001

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θ13: phenomenology, present status and prospect

Author(s): Mauro Mezzetto , Thomas Schwetz

Publication date (Electronic): September 07 2010

Journal: Journal of Physics G: Nuclear and Particle Physics

Publisher: IOP Publishing

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Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory

Q. R. Ahmad, R C Allen, T. C. Andersen … (2002)

Observations of neutral-current nu interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current (NC), elastic scattering, and charged current reactions and assuming the standard 8B shape, the nu(e) component of the 8B solar flux is phis(e) = 1.76(+0.05)(-0.05)(stat)(+0.09)(-0.09)(syst) x 10(6) cm(-2) s(-1) for a kinetic energy threshold of 5 MeV. The non-nu(e) component is phi(mu)(tau) = 3.41(+0.45)(-0.45)(stat)(+0.48)(-0.45)(syst) x 10(6) cm(-2) s(-1), 5.3sigma greater than zero, providing strong evidence for solar nu(e) flavor transformation. The total flux measured with the NC reaction is phi(NC) = 5.09(+0.44)(-0.43)(stat)(+0.46)(-0.43)(syst) x 10(6) cm(-2) s(-1), consistent with solar models.