Abstract
Solar Neutrinos from the decay of 8B have been detected at the Sudbury Neutrino Observatory (SNO) by charged current (CC) and neutral current (NC) interactions on deuterium and elastic scattering (ES) of electrons. The SNO data indicate that with the assumption of undistorted 8B shape, the flux for ve is φe = 1.76−0.05+0.05 (stat.)−0.09+0.09 (syst.) × 106 cm−2s−1 for a kinetic energy threshold of 5 MeV. The non‐ve flux is φμτ = 3.41−0.45+0.45 (stat.)−0.45+0.45 (syst.) × 106 cm−2s−1. This provides strong evidence for solar ve flavor transformation. The day and night solar neutrino energy spectra and rates have also been measured. For CC events, the ve asymmetry is 14.0% ± 6.3% −1.4+1.5 %. By additionally constraining the total (NC) flux of active neutrinos to have no asymmetry, the ve asymmetry becomes 7.0% ± 4.9% −1.2+1.3 %. A global solar neutrino analysis strongly favors the Large Mixing Angle (LMA) solution in a two‐flavor neutrino oscillation model.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
