Solar Neutrino Results from SNO

The Sudbury Neutrino Observatory (SNO) is an underground heavy-water Cherenkov detector designed to detect ⁸B solar neutrinos through neutral (NC) and charged (CC) current interactions on deuterons and elastic scattering on electrons. The results from the pure D₂O phase of the experiment confirmed solar model predictions and gave strong evidence for flavor change. In the second phase, 2 tonnes of NaCl were added to the heavy water, in order to enhance the detection of neutral current interactions. This allowed for precision, energy-unconstrained measurements of the solar neutrino flux that exclude maximal flavor mixing at a level of 5σ. The talk focused on the characterization of the detector response and the implications of the salt phase results on Neutrino Oscillation Physics. A status report was also given on the installation and commissioning work for the third phase of SNO, in which 40 ³He gas counters are deployed in the D₂O volume in order to detect the NC neutrons independently from the CC events.