Measurement of charged current interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
Solar neutrinos from the decay of 8B have been detected at the Sudbury
Neutrino Observatory (SNO) via the charged current (CC) reaction on
deuterium and by the elastic scattering (ES) of electrons.
Comparison of phiCC(nue) to the Super-Kamiokande Collaboration's precision value of phiES(nux) yields a 3.3 sigma difference, providing evidence that there is a non-electron flavor active neutrino component in the solar flux. The total flux of active 8B neutrinos is thus determined to be 5.44+-0.99 x 106 cm-2s-1, in close agreement with the predictions of solar models.
The data selection and analysis procedures leading to the first SNO results will be presented. The future plans will then be outlined.