Measurement of the νe and total 8B solar neutrino fluxes with the Sudbury Neutrino Observatory phase-III data set
2013
This article provides the complete description of results from the Phase I data set of the
Sudbury Neutrino Observatory(SNO). The Phase I data set is based on a 0.65 kt-year exposure of
heavy waterto the solar 8B neutrino flux. Included here are details of the SNO physics and detector model, evaluations of systematic uncertainties, and estimates of backgrounds. Also discussed are SNO's approach to statistical extraction of the signals from the three neutrino reactions (
charged current,
neutral current, and elastic scattering) and the results of a search for a day-night asymmetry in the ?e flux. Under the assumption that the 8B spectrum is undistorted, the measurements from this phase yield a solar ?e flux of ?(?e) = 1.76+0.05?0.05(
stat.)+0.09?0.09 (syst.) x 106 cm?2 s?1, and a non-?e component ?(? mu) = 3.41+0.45?0.45(
stat.)+0.48?0.45 (syst.) x 106 cm?2 s?1. The sum of these components provides a total flux in excellent agreement with the predictions of
Standard Solar Models. The day-night asymmetry in the ?e flux is found to be Ae = 7.0 +- 4.9 (
stat.)+1.3?1.2 percent (sys.), when the asymmetry in the total flux is constrained to be zero.
Keywords:
-
Correction
-
Source
-
Cite
-
Save
2
References
99
Citations
NaN
KQI