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3. Measurement of CC interactions produced by ${}^8$B solar neutrinos at SNO

Author

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

Published
2001
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4. Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in SNO.

Author

McDonald, A. B., Ahmad, Q. R., Allen, R. C., Andersen, T. C., Anglin, J. D., Barton, J. C., Beier, E. W., Bercovitch, 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., and Browne, M.C.

Subjects
NEUTRINOS, FLAVOR in particle physics, SCATTERING (Physics)
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 [sup 8]B 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 [sup 8]B shape, the ν[sub e] component of the [sup 8]B solar flux is φ[sub e] = 1.76[sup +0.05, sub -0.05](stat.)[sup +0.09, sub -0.09] (syst.) × 10[sup 6] cm[sup -2]s[sup -1] for a kinetic energy threshold of 5 MeV. The non-ν[sub e] component is φ[sub μτ] = 3.41[sup +0.45, sub -0.45](stat.)[sup +0.48, sub 0.45] (syst.) × 10[sup 6] cm[sup -2]s[sup -l], 5.3σ greater than zero, providing strong evidence for solar ν[sub e] flavor transformation. The total flux measured with the NC reaction is φ[sub NC] = 5.09[sup +0.44, sub -0.43](stat.)[sup +0.46, sub -0.43] (syst.) × 10[sup 6] cm[sup -2]s[sup -1] consistent with solar models. For charged current events, assuming an undistorted [sup 8]B spectrum, the night minus day rate is 14.0% ± 6.3%[sup +1.5. sub -1.4]% of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the ν[sub e] asymmetry is found to be 7.0% ± 4.9%[sup +1.3, sub -1.2]%. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution. [ABSTRACT FROM AUTHOR]

Published
2002

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