1. Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in SNO
- Author
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T. V. Bullard, M. H. Schwendener, B. C. Robertson, E. W. Beier, H. Fergani, G. Doucas, J. M. Wouters, H. W. Lee, J. Law, H. S. Ng, D. L. Wark, P. J. Doe, A. R. Smith, K. McFarlane, J. B. Wilhelmy, T. Kutter, Guthrie Miller, J.D. Anglin, A. S. Hamer, Q. R. Ahmad, C. J. Sims, J. V. Germani, M. Moorhead, R. Meijer Drees, J. Cameron, A. B. McDonald, H. Heron, F. Dalnoki-Veress, Min Chen, A. D. Marino, Christopher C. M. Kyba, John Heise, R. U. Haq, N. McCauley, K. Kazkaz, T. J. Radcliffe, R. G. H. Robertson, M. R. Dragowsky, E. Saettler, R. J. Boardman, T. Spreitzer, G. A. Cox, Andrew Hime, W. B. Handler, J.L. Hewett, Herbert H. Chen, Jochen Klein, Ilan Levine, C. J. Virtue, M. W.E. Smith, I. Lawson, N. Tagg, Anett Schulke, S. J. Brice, J. Bigu, Chris Waltham, A. J. Noble, Y. I. Tserkovnyak, R. L. Hahn, Salvador Gil, G. McGregor, J. G. Hykawy, Yuen-Dat Chan, A. P. Ferraris, J. X. Wang, E. D. Earle, A. L. Hallin, C. Mifflin, B. T. Cleveland, X. Chen, N.W. Tanner, K. Graham, L. C. Stonehill, S. M. Oser, J. Farine, Minfang Yeh, G. Jonkmans, N. West, V. L. Rusu, P. Skensved, M. Lay, R. K. Taplin, F. A. Duncan, J. H.M. Cowan, M. G. Boulay, W. J. Heintzelman, J. C. Barton, N. A. Jelley, M. Thorman, R. A. Black, M. O'Neill, J. J. Simpson, P. T. Keener, R. J. Ford, D. F. Cowen, Monica Dunford, J. Maneira, F. M. Newcomer, A. W. P. Poon, G. Bühler, J. A. Dunmore, A. Knox, P. T. Trent, R. W. Ollerhead, Peter Wittich, J. Lyon, M. C.P. Isaac, R. G. Stokstad, N. Gagnon, K. Frame, J. K. Rowley, B. A. Moffat, K. M. Heeger, I. Blevis, R. S. Storey, John L. Orrell, M. Omori, Joseph A. Formaggio, E. Bonvin, E. D. Hallman, R. Van Berg, W. Locke, A. Roberge, E. T.H. Clifford, J. Boger, T. J. Bowles, C. E. Okada, J. D. Hepburn, S. R. Elliott, David A. Sinclair, G. T. Ewan, T. D. Steiger, K. K. Schaffer, James R. Wilson, T. C. Andersen, A. A. Hamian, E.D. Frank, C. K. Hargrove, D. S. McDonald, X. Dai, V. M. Novikov, R. J. Komar, R. C. Allen, W. Frati, Bhaskar Sur, Mark Neubauer, Richard T. Kouzes, S. S.E. Rosendahl, Hal Evans, M. G. Bowler, M. C. Browne, Ryuta Hazama, R. L. Helmer, M. Bercovitch, S. Majerus, M. Shatkay, C. W. Nally, C. Jillings, C. A. Duba, H. B. Mak, W.F. Davidson, S. D. Biller, J. F. Wilkerson, Reda Tafirout, P. J. Harvey, Darren Grant, P. M. Thornewell, G. Milton, M. A. Howe, J. Manor, Malcolm M. Fowler, Eric B. Norman, H. Seifert, J. R. Leslie, P. Jagam, R. G. Van de Water, N. Starinsky, S. Luoma, and K. T. Lesko
- Subjects
Physics ,Particle physics ,Sudbury Neutrino Observatory ,Neutral current ,Physics::Instrumentation and Detectors ,Solar neutrino ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Solar neutrino problem ,Nuclear physics ,Neutrino detector ,High Energy Physics::Experiment ,Astrophysics::Earth and Planetary Astrophysics ,Neutrino ,Nuclear Experiment ,Neutrino oscillation ,Charged current - Abstract
The Sudbury Neutrino Observatory (SNO) is a 1,000 tonne heavy water Cerenkov‐based neutrino detector situated 2,000 meters underground in INCO’s Creighton Mine near Sudbury, Ontario, Canada. For the neutrinos from 8B decay in the Sun SNO observes the Charged Current neutrino reaction sensitive only to electron neutrinos and others (Neutral Current and Elastic Scattering) sensitive to all active neutrino types and thereby can search for direct evidence of neutrino flavor change. Using these reactions and assuming the standard 8B shape, the ve component of the 8B solar flux is φe = 1.76−0.05+0.05(stat.)−0.09+0.09 (syst.) × 106 cm−2s−1 for a kinetic energy threshold of 5 MeV. The non‐ve component is φμτ = 3.41−0.45+0.45(stat.)−0.45+0.48 (syst.) × 106 cm−2s−1, 5.3σ greater than zero, providing strong evidence for solar ve flavor transformation. The total flux measured with the NC reaction is φNC = 5.09−0.43+0.44(stat.)−0.43+0.46 (syst.) × 106 cm−2s−1, consistent with solar models. For charged current events, ...
- Published
- 2002
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