Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters
Physical Review Letters 89:1 (2002)
Abstract:
The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted [Formula presented] spectrum, the night minus day rate is [Formula presented] of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the [Formula presented] asymmetry is found to be [Formula presented]. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the large mixing angle solution. © 2002 The American Physical Society.Measurement of CC interactions produced by ${}^8$B solar neutrinos at SNO
Sissa Medialab Srl (2001) 186
Measurement of the rate of nu(e) + d --> p + p + e(-) interactions produced by (8)B solar neutrinos at the Sudbury Neutrino Observatory.
Phys Rev Lett 87:7 (2001) 071301
Abstract:
Solar neutrinos from (8)B 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 straight phi(CC)(nu(e)) = 1.75 +/- 0.07(stat)(+0.12)(-0.11)(syst) +/- 0.05(theor) x 10(6) cm(-2) s(-1). Comparison of straight phi(CC)(nu(e)) to the Super-Kamiokande Collaboration's precision value of the flux inferred from the ES reaction yields a 3.3 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 8B neutrinos is determined to be 5.44+/-0.99 x 10(6) cm(-2) s(-1).Measurement of the rate of ve + d → p + p + e- interactions produced by 8B solar neutrinos at the sudbury neutrino observatory
Physical Review Letters 87:7 (2001)
Abstract:
The 8B flux from elastic scattering (ES) and charged current (CC) of electrons was recorded at the Sudbury Neutrino Observatory (SNO) between November 2, 1999 and January 15, 2001. Data were partitioned into two sets then analyzed. As a result, the first direct indication of a nonelectron flavor component in the solar neutrino flux was established.Measurement of the Rate of nu_e + d -> p+p+e- Interactions Produced by B-8 Solar Neutrinos at the Sudbury Neutrino Observatory
Physical Review Letters 87 (2001) 071301 6pp