Determination of the νe and total 8B solar neutrino fluxes using the Sudbury Neutrino Observatory Phase I data set

被引:138
作者
Aharmim, B. [1 ]
Ahmad, Q. R.
Ahmed, S. N.
Allen, R. C.
Andersen, T. C.
Anglin, J. D.
Buehler, G.
Barton, J. C.
Beier, E. W.
Bercovitch, M.
Bergevin, M.
Bigu, J.
Biller, S. D.
Black, R. A.
Blevis, I.
Boardman, R. J.
Boger, J.
Bonvin, E.
Boulay, M. G.
Bowler, M. G.
Bowles, T. J.
Brice, S. J.
Browne, M. C.
Bullard, T. V.
Burritt, T. H.
Cameron, J.
Chan, Y. D.
Chen, H. H.
Chen, M.
Chen, X.
Cleveland, B. T.
Cowan, J. H. M.
Cowen, D. F.
Cox, G. A.
Currat, C. A.
Dai, X.
Dalnoki-Veress, F.
Davidson, W. F.
Deng, H.
DiMarco, M.
Doe, P. J.
Doucas, G.
Dragowsky, M. R.
Duba, C. A.
Duncan, F. A.
Dunford, M.
Dunmore, J. A.
Earle, E. D.
Elliott, S. R.
Evans, H. C.
机构
[1] Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada
[2] Atom Energy Canada Ltd, Chalk River Labs, Chalk River, ON K0J 1J0, Canada
[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[4] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA
[5] Univ Calif Irvine, Dept Phys, Irvine, CA 92717 USA
[6] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada
[7] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada
[8] Univ Calif Berkeley, Lawrence Berkeley Lab, Inst Nucl & Particle Astrophys, Berkeley, CA 94720 USA
[9] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA
[10] Lab Instrumentacao & Fis Expt Particulas, P-1000149 Lisbon, Portugal
[11] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[12] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[13] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA
[14] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada
[15] Univ Oxford, Dept Phys, Oxford OX1 3RH, England
[16] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[17] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
[18] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada
[19] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[20] SNOLAB, Sudbury, ON P3Y 1M3, Canada
[21] Univ Texas, Dept Phys, Austin, TX 78712 USA
[22] TRIUMF, Vancouver, BC V6T 2A3, Canada
[23] Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA
[24] Univ Washington, Dept Phys, Seattle, WA 98195 USA
来源
PHYSICAL REVIEW C | 2007年 / 75卷 / 04期
关键词
D O I
10.1103/PhysRevC.75.045502
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
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 kiloton-year exposure of (H2O)-H-2 (in the following denoted as D2O) to the solar B-8 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 nu(e) flux. Under the assumption that the B-8 spectrum is undistorted, the measurements from this phase yield a solar nu(e) flux of phi(nu(e)) =1.76(-0.05)(+0.05)(stat.)(-0.09)(+0.09)(syst.) x 10(6) cm(-2) s(-1) and a non-nu(e) component of phi(nu(mu tau)) = 3.41(-0.45)(+0.45)(stat.)(-0.45)(+0.48)(syst.) x 10(6) 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 nu(e) flux is found to be A(e) = 7.0 +/- 4.9(stat.)(-1.2)(+1.3)%(syst.), when the asymmetry in the total flux is constrained to be zero.
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