Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters

Authors

Q. R. Ahmad, University of Washington
R. C. Allen, University of California, Irvine
T. C. Andersen, University of Guelph
J. D. Anglin, National Research Council Canada
J. C. Barton, University of Oxford
E. W. Beier, University of Pennsylvania
M. Bercovitch, National Research Council Canada
J. Bigu, Laurentian University
S. D. Biller, University of Oxford
R. A. Black, University of Oxford
I. Blevis, Carleton University
R. J. Boardman, University of Oxford
J. Boger, Brookhaven National Laboratory
E. Bonvin, Queen’s University
M. G. Boulay, Los Alamos National Laboratory
M. G. Bowler, University of Oxford
T. J. Bowles, Los Alamos National Laboratory
S. J. Brice, Los Alamos National Laboratory
M. C. Browne, Los Alamos National Laboratory
T. V. Bullard, University of Washington
G. Bühler, University of California, Irvine
J. Cameron, University of Oxford
Y. D. Chan, Lawrence Berkeley National Laboratory
H. H. Chen, University of California, Irvine
M. Chen, Queen’s University
X. Chen, Lawrence Berkeley National Laboratory
B. T. Cleveland, University of Oxford
E. T.H. Clifford, Queen’s University

Document Type

Article

Publication Date

1-1-2002

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.

Publication Source (Journal or Book title)

Physical Review Letters

Recommended Citation

Ahmad, Q., Allen, R., Andersen, T., Anglin, J., Barton, J., Beier, E., Bercovitch, M., Bigu, J., Biller, S., Black, R., Blevis, I., Boardman, R., Boger, J., Bonvin, E., Boulay, M., Bowler, M., Bowles, T., Brice, S., Browne, M., Bullard, T., Bühler, G., Cameron, J., Chan, Y., Chen, H., Chen, M., Chen, X., Cleveland, B., & Clifford, E. (2002). Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters. Physical Review Letters, 89 (1) https://doi.org/10.1103/PhysRevLett.89.011302