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. 2001 Aug 13;87(7):071301.
doi: 10.1103/PhysRevLett.87.071301. Epub 2001 Jul 25.

Measurement of the rate of nu(e) + d --> p + p + e(-) interactions produced by (8)B solar neutrinos at the Sudbury Neutrino Observatory

Q R Ahmad  1 , R C Allen, T C Andersen, J D Anglin, G Bühler, J C Barton, E W Beier, M Bercovitch, J Bigu, S 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, T H Burritt, K Cameron, J Cameron, Y D Chan, M Chen, H H Chen, X Chen, M C Chon, B T Cleveland, E T Clifford, J H Cowan, D F Cowen, G A Cox, Y Dai, X Dai, F Dalnoki-Veress, W F Davidson, P J Doe, G Doucas, M R Dragowsky, C A Duba, F A Duncan, J Dunmore, E D Earle, S R Elliott, H C Evans, G T Ewan, J Farine, H Fergani, A P Ferraris, R J Ford, M M Fowler, K Frame, E D Frank, W Frati, J V Germani, S Gil, A Goldschmidt, D R Grant, R L Hahn, A L Hallin, E D Hallman, A Hamer, A A Hamian, R U Haq, C K Hargrove, P J Harvey, R Hazama, R Heaton, 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 Isaac, P Jagam, N A Jelley, C Jillings, G Jonkmans, J Karn, P T Keener, K Kirch, J R Klein, A B Knox, R J Komar, R Kouzes, T Kutter, C C Kyba, J Law, I T Lawson, M Lay, H W Lee, K T Lesko, J R Leslie, I Levine, W Locke, M M Lowry, S Luoma, J Lyon, S Majerus, H B Mak, A D Marino, N McCauley, A B McDonald, D S McDonald, K McFarlane, G McGregor, W McLatchie, R Meijer Drees, H Mes, 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 Poon, T J Radcliffe, A Roberge, B C Robertson, R G Robertson, J K Rowley, V L Rusu, E Saettler, K K Schaffer, A Schuelke, M H Schwendener, H Seifert, M Shatkay, J J Simpson, D Sinclair, P Skensved, A R Smith, M W Smith, N Starinsky, T D Steiger, R G Stokstad, R S Storey, B Sur, R Tafirout, N Tagg, N W Tanner, R K Taplin, M Thorman, P 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 Wilson, P Wittich, J M Wouters, M Yeh; SNO Collaboration. Sudbury Neutrino Observatory
Affiliations

Measurement of the rate of nu(e) + d --> p + p + e(-) interactions produced by (8)B solar neutrinos at the Sudbury Neutrino Observatory

Q R Ahmad et al. Phys Rev Lett. .

Abstract

Solar neutrinos from (8)B decay have been detected at the Sudbury Neutrino Observatory via the charged current (CC) reaction on deuterium and the elastic scattering (ES) of electrons. The flux of nu(e)'s is measured by the CC reaction rate to be straight phi(CC)(nu(e)) = 1.75 +/- 0.07(stat)(+0.12)(-0.11)(syst) +/- 0.05(theor) x 10(6) cm(-2) s(-1). Comparison of straight phi(CC)(nu(e)) to the Super-Kamiokande Collaboration's precision value of the flux inferred from the ES reaction yields a 3.3 sigma difference, assuming the systematic uncertainties are normally distributed, providing evidence of an active non- nu(e) component in the solar flux. The total flux of active 8B neutrinos is determined to be 5.44+/-0.99 x 10(6) cm(-2) s(-1).

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