Measurement of the rate of νe+d →p+p+e- interactions produced by 8B solar neutrinos at the sudbury neutrino observatory -: art. no. 071301

Solar neutrinos from B-8 decay have been detected at the Sudbury Neutrino Observatory via the charged current (CC) reaction on deuterium and the elastic scattering (ES) of electrons. The flux of nu (e)'s is measured by the CC reaction rate to be phi (CC)(nu (e)) = 1.75 +/-0.07(stat)(-0.11)(+0.12)(syst) +/-0.05(theor) x 10(6) cm(-2) s(-1). Comparison of phi (CC)(nu (e)) to the Super-Kamiokande Collaboration's precision value of the flux inferred from the ES reaction yields a 3.3o sigma difference, assuming the systematic uncertainties are normally distributed, providing evidence of an active non=nu (e) component in the solar flux. The total flux of active B-8 neutrinos is determined to be 5.44 +/-0.99 x 10(6) cm(-2) s(-1).