Phys. Rev. C
75,
045502
(2007)
[69 pages]
Determination of the νe and total 8B solar neutrino fluxes using the Sudbury Neutrino Observatory Phase I data set
B. Aharmim et al. SNO Collaboration
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B. Aharmim7, Q. R. Ahmad22, S. N. Ahmed17, R. C. Allen4, T. C. Andersen6, J. D. Anglin13, G. Bühler4, J. C. Barton14,*, E. W. Beier15, M. Bercovitch13, M. Bergevin6,8, J. Bigu7, S. D. Biller14, R. A. Black14, I. Blevis5, R. J. Boardman14, J. Boger3,†, E. Bonvin17, M. G. Boulay10,17, M. G. Bowler14, T. J. Bowles10, S. J. Brice10,14,‡, M. C. Browne10,22, T. V. Bullard22, T. H. Burritt22, J. Cameron14, Y. D. Chan8, H. H. Chen4,*, M. Chen17, X. Chen8,§, B. T. Cleveland14, J. H. M. Cowan7, D. F. Cowen15,**, G. A. Cox22, C. A. Currat8, X. Dai5,14,17, F. Dalnoki-Veress5,††, W. F. Davidson13, H. Deng15, M. DiMarco17, P. J. Doe22, G. Doucas14, M. R. Dragowsky8,10,‡‡, C. A. Duba22, F. A. Duncan17,19, M. Dunford15,a, J. A. Dunmore14,b, E. D. Earle17, S. R. Elliott10,22, H. C. Evans17, G. T. Ewan17, J. Farine7, H. Fergani14, A. P. Ferraris14, F. Fleurot7, R. J. Ford17,19, J. A. Formaggio12, M. M. Fowler10, K. Frame5,14, E. D. Frank15,c, W. Frati15, N. Gagnon8,10,14,22, J. V. Germani10,22, S. Gil2,d, A. Goldschmidt10,e, J. T. M. Goon11, K. Graham5, D. R. Grant5,‡‡, E. Guillian17, R. L. Hahn3, A. L. Hallin17, E. D. Hallman7, A. S. Hamer10,17,*, A. A. Hamian22, W. B. Handler17, R. U. Haq7, C. K. Hargrove5, P. J. Harvey17, R. Hazama22,f, K. M. Heeger22,g, W. J. Heintzelman15, J. Heise2,10,17, R. L. Helmer21, R. Henning8, J. D. Hepburn17, H. Heron14, J. Hewett7, A. Hime10, C. Howard17, M. A. Howe22, M. Huang20, J. G. Hykaway7, M. C. P. Isaac8, P. Jagam6, B. Jamieson2, N. A. Jelley14, C. Jillings17, G. Jonkmans1,7, K. Kazkaz22, P. T. Keener15, K. Kirch10,h, J. R. Klein20, A. B. Knox14, R. J. Komar2, L. L. Kormos17, M. Kos17, R. Kouzes16, A. Krüger7, C. Kraus17, C. B. Krauss17, T. Kutter11, C. C. M. Kyba15, H. Labranche6, R. Lange3, J. Law6, I. T. Lawson6,19, M. Lay14, H. W. Lee17, K. T. Lesko8, J. R. Leslie17, I. Levine5,i, J. C. Loach14, W. Locke14, S. Luoma7, J. Lyon14, R. MacLellan17, S. Majerus14, H. B. Mak17, J. Maneira9, A. D. Marino8,j, R. Martin17, N. McCauley14,15,k, A. B. McDonald17, D. S. McDonald15, K. McFarlane5, S. McGee22, G. McGregor14,‡, R. Meijer Drees22, H. Mes5, C. Mifflin5, K. K. S. Miknaitis22,a, M. L. Miller12, G. Milton1, B. A. Moffat17, B. Monreal12, M. Moorhead8,14, B. Morrissette19, C. W. Nally2, M. S. Neubauer15,l, F. M. Newcomer15, H. S. Ng2, B. G. Nickel6, A. J. Noble17, E. B. Norman8,m, V. M. Novikov5, N. S. Oblath22, C. E. Okada8,n, H. M. O'Keeffe14, R. W. Ollerhead6, M. Omori14, J. L. Orrell22,o, S. M. Oser2, R. Ott12, S. J. M. Peeters14, A. W. P. Poon8, G. Prior8, S. D. Reitzner6, K. Rielage10,22, A. Roberge7, B. C. Robertson17, R. G. H. Robertson22, S. S. E. Rosendahl8,p, J. K. Rowley3, V. L. Rusu15,a, E. Saettler7, A. Schülke8,q, M. H. Schwendener7, J. A. Secrest15, H. Seifert7,10,22, M. Shatkay5, J. J. Simpson6, C. J. Sims14, D. Sinclair5,21, P. Skensved17, A. R. Smith8, M. W. E. Smith10,22, N. Starinsky5,8,10,22,r, T. D. Steiger22, R. G. Stokstad8, L. C. Stonehill10,22, R. S. Storey13,*, B. Sur1,17, R. Tafirout7,s, N. Tagg6,14,t, Y. Takeuchi17, N. W. Tanner14, R. K. Taplin14, M. Thorman14, P. M. Thornewell10,14,22, N. Tolich8, P. T. Trent14, Y. I. Tserkovnyak2,u, T. Tsui2, C. D. Tunnell20, R. Van Berg15, R. G. Van de Water10,15, C. J. Virtue7, T. J. Walker12, B. L. Wall22, C. E. Waltham2, H. Wan Chan Tseung14, J.-X. Wang6, D. L. Wark18,v, J. Wendland2, N. West14, J. B. Wilhelmy10, J. F. Wilkerson22, J. R. Wilson14,w, P. Wittich15,x, J. M. Wouters10, A. Wright17, M. Yeh3, and K. Zuber14,w (SNO Collaboration)
1Atomic Energy of Canada, Limited, Chalk River Laboratories, Chalk River, Ontario K0J 1J0, Canada
2Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
3Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
4Department of Physics, University of California, Irvine, California 92717, USA
5Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ontario K1S 5B6, Canada
6Physics Department, University of Guelph, Guelph, Ontario N1G 2W1, Canada
7Department of Physics and Astronomy, Laurentian University, Sudbury, Ontario P3E 2C6, Canada
8Institute for Nuclear and Particle Astrophysics and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
9Laboratório de Instrumentação e Física Experimental de Partículas, Av. Elias Garcia 14, 1°, P-1000-149 Lisboa, Portugal
10Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
11Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
12Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
13National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
14Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
15Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, USA
16Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
17Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
18Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom
19SNOLAB, Sudbury, Ontario P3Y 1M3, Canada
20Department of Physics, University of Texas at Austin, Austin, Texas 78712-0264, USA
21TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
22Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA
Received 13 October 2006; published 27 April 2007
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 2H2O (in the following denoted as D2O) to 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 νe flux. Under the assumption that the 8B spectrum is undistorted, the measurements from this phase yield a solar νe flux of ϕ(νe)=1.76-0.05+0.05(stat.)-0.09+0.09(syst.)×106 cm-2 s-1 and a non-νe component of ϕ(νμτ)=3.41-0.45+0.45(stat.)-0.45+0.48(syst.)×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 νe flux is found to be Ae=7.0±4.9(stat.)-1.2+1.3%(syst.), when the asymmetry in the total flux is constrained to be zero.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.045502
DOI:
10.1103/PhysRevC.75.045502
PACS:
26.65.+t, 14.60.Pq, 13.15.+g, 95.85.Ry
*Deceased. †Present address: U.S. Department of Energy, Germantown, Maryland, USA. ‡Present address: Fermilab, Batavia, Illinois, USA. §Present address: Goldman Sachs, 85 Broad Street, New York, USA. **Present address: Department of Physics, Pennsylvania State University, University Park, Pennsylvania, USA. ††Present address: Department of Physics, Princeton University, Princeton, New Jersey 08544, USA. ‡‡Present address: Department of Physics, Case Western Reserve University, Cleveland, Ohio, USA. aPresent address: Department of Physics, University of Chicago, Chicago, Illinois, USA. bPresent address: Department of Physics, University of California, Irvine, California, USA. cPresent address: Deparment of Mathematics and Computer Science, Argonne National Laboratory, Lemont, Illinois, USA. dPresent address: University of Buenos Aires, Argentina. ePresent address: Lawrence Berkeley National Laboratory, Berkeley, California, USA. fPresent address: Department of Physics, Hiroshima University, Hiroshima, Japan. gPresent address: Department of Physics, University of Wisconsin, Madison, Wisconsin, USA. hPresent address: Paul Schiffer Institute, Villigen, Switzerland. iPresent address: Department of Physics and Astronomy, Indiana University, South Bend, Indiana, USA. jPresent address: Department of Physics, University of Toronto, Toronto, Ontario, Canada. kPresent address: Department of Physics, University of Liverpool, Liverpool, United Kingdom. lPresent address: Department of Physics, University of California at San Diego, La Jolla, California, USA. mPresent address: Lawrence Livermore National Laboratory, Livermore, California, USA. nPresent address: Remote Sensing Lab, Post Office Box 98521, Las Vegas, Nevada 89193, USA. oPresent address: Pacific Northwest National Laboratory, Richland, Washington, USA. pPresent address: Department of Physics, Lund University, Lund, Sweden. qPresent address: NEC Europe, Ltd., Kurfürsten-Anlage 36, D-69115 Heidelberg, Germany. rPresent address: René J.A. Lévesque Laboratory, Université de Montréal, Montreal, Québec, Canada. sPresent address: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada. tPresent address: Department of Physics and Astronomy, Tufts University, Medford, Massachusetts, USA. uPresent address: Department of Physics, Harvard University, Cambridge, Massachusetts, USA. vAdditional address: Imperial College, London SW7 2AZ, United Kingdom. wPresent address: Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom. xPresent address: Department of Physics, Cornell University, Ithaca, New York, USA.
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