Measurement of day and night neutrino energy spectra at SNO and constraints on neutrino mixing parameters

Q R Ahmad; R C Allen; T C Andersen; J D Anglin; J C Barton; E W Beier; M Bercovitch; J Bigu; S D Biller; R A Black; I Blevis; R J Boardman; J Boger; E Bonvin; M G Boulay; M G Bowler; T J Bowles; S J Brice; M C Browne; T V Bullard; G Bühler; J Cameron; Y D Chan; H H Chen; M Chen; X Chen; B T Cleveland; E T H Clifford; J H M Cowan; D F Cowen; G A Cox; X Dai; F Dalnoki-Veress; W F Davidson; P J Doe; G Doucas; M R Dragowsky; C A Duba; F A Duncan; M Dunford; J A Dunmore; E D Earle; S R Elliott; H C Evans; G T Ewan; J Farine; H Fergani; A P Ferraris; R J Ford; J A Formaggio; M M Fowler; K Frame; E D Frank; W Frati; N Gagnon; J V Germani; S Gil; K Graham; D R Grant; R L Hahn; A L Hallin; E D Hallman; A S Hamer; A A Hamian; W B Handler; R U Haq; C K Hargrove; P J Harvey; R Hazama; K M Heeger; W J Heintzelman; J Heise; R L Helmer; J D Hepburn; H Heron; J Hewett; A Hime; M Howe; J G Hykawy; M C P Isaac; P Jagam; N A Jelley; C Jillings; G Jonkmans; K Kazkaz; P T Keener; J R Klein; A B Knox; R J Komar; R Kouzes; T Kutter; C C M Kyba; J Law; I T Lawson; M Lay; H W Lee; K T Lesko; J R Leslie; I Levine; W Locke; S Luoma; J Lyon; S Majerus; H B Mak; J Maneira; J Manor; A D Marino; N McCauley; A B McDonald; D S McDonald; K McFarlane; G McGregor; R Meijer Drees; C Mifflin; G G Miller; G Milton; B A Moffat; M Moorhead; C W Nally; M S Neubauer; F M Newcomer; H S Ng; A J Noble; E B Norman; V M Novikov; M O'Neill; C E Okada; R W Ollerhead; M Omori; J L Orrell; S M Oser; A W P Poon; T J Radcliffe; A Roberge; B C Robertson; R G H Robertson; S S E Rosendahl; J K Rowley; V L Rusu; E Saettler; K K Schaffer; M H Schwendener; A Schülke; H Seifert; M Shatkay; J J Simpson; C J Sims; D Sinclair; P Skensved; A R Smith; M W E Smith; T Spreitzer; N Starinsky; T D Steiger; R G Stokstad; L C Stonehill; R S Storey; B Sur; R Tafirout; N Tagg; N W Tanner; R K Taplin; M Thorman; P M Thornewell; P T Trent; Y I Tserkovnyak; R Van Berg; R G Van de Water; C J Virtue; C E Waltham; J-X Wang; D L Wark; N West; J B Wilhelmy; J F Wilkerson; J R Wilson; P Wittich; J M Wouters; M Yeh; SNO Collaboration. Sudbury Neutrino Observatory

doi:10.1103/PhysRevLett.89.011302

Measurement of day and night neutrino energy spectra at SNO and constraints on neutrino mixing parameters

Phys Rev Lett. 2002 Jul 1;89(1):011302. doi: 10.1103/PhysRevLett.89.011302. Epub 2002 Jun 13.

Authors

Q R Ahmad¹, R C Allen, T C Andersen, J D Anglin, J C Barton, E W Beier, M Bercovitch, J Bigu, S D Biller, R A Black, I Blevis, R J Boardman, J Boger, E Bonvin, M G Boulay, M G Bowler, T J Bowles, S J Brice, M C Browne, T V Bullard, G Bühler, J Cameron, Y D Chan, H H Chen, M Chen, X Chen, B T Cleveland, E T H Clifford, J H M Cowan, D F Cowen, G A Cox, X Dai, F Dalnoki-Veress, W F Davidson, P J Doe, G Doucas, M R Dragowsky, C A Duba, F A Duncan, M Dunford, J A Dunmore, E D Earle, S R Elliott, H C Evans, G T Ewan, J Farine, H Fergani, A P Ferraris, R J Ford, J A Formaggio, M M Fowler, K Frame, E D Frank, W Frati, N Gagnon, J V Germani, S Gil, K Graham, D R Grant, R L Hahn, A L Hallin, E D Hallman, A S Hamer, A A Hamian, W B Handler, R U Haq, C K Hargrove, P J Harvey, R Hazama, K M Heeger, W J Heintzelman, J Heise, R L Helmer, J D Hepburn, H Heron, J Hewett, A Hime, M Howe, J G Hykawy, M C P Isaac, P Jagam, N A Jelley, C Jillings, G Jonkmans, K Kazkaz, P T Keener, J R Klein, A B Knox, R J Komar, R Kouzes, T Kutter, C C M Kyba, J Law, I T Lawson, M Lay, H W Lee, K T Lesko, J R Leslie, I Levine, W Locke, S Luoma, J Lyon, S Majerus, H B Mak, J Maneira, J Manor, A D Marino, N McCauley, A B McDonald, D S McDonald, K McFarlane, G McGregor, R Meijer Drees, C Mifflin, G G Miller, G Milton, B A Moffat, M Moorhead, C W Nally, M S Neubauer, F M Newcomer, H S Ng, A J Noble, E B Norman, V M Novikov, M O'Neill, C E Okada, R W Ollerhead, M Omori, J L Orrell, S M Oser, A W P Poon, T J Radcliffe, A Roberge, B C Robertson, R G H Robertson, S S E Rosendahl, J K Rowley, V L Rusu, E Saettler, K K Schaffer, M H Schwendener, A Schülke, H Seifert, M Shatkay, J J Simpson, C J Sims, D Sinclair, P Skensved, A R Smith, M W E Smith, T Spreitzer, N Starinsky, T D Steiger, R G Stokstad, L C Stonehill, R S Storey, B Sur, R Tafirout, N Tagg, N W Tanner, R K Taplin, M Thorman, P M Thornewell, P T Trent, Y I Tserkovnyak, R Van Berg, R G Van de Water, C J Virtue, C E Waltham, J-X Wang, D L Wark, N West, J B Wilhelmy, J F Wilkerson, J R Wilson, P Wittich, J M Wouters, M Yeh; SNO Collaboration. Sudbury Neutrino Observatory

Affiliation

¹ Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.

PMID: 12097026
DOI: 10.1103/PhysRevLett.89.011302

Abstract

The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted 8B spectrum, the night minus day rate is 14.0%+/-6.3%(+1.5%)(-1.4%) of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the nu(e) asymmetry is found to be 7.0%+/-4.9%(+1.3%)(-1.2%). A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the large mixing angle solution.