Direct evidence for neutrino flavor transformation from neutral-current interactions in the Sudbury Neutrino Observatory Ahmad, Q R; Bullard, T V; Cox, G A; Duba, C A; Formaggio, J A; Germani, J V; Hamian, A A; Hazama, R; Heeger, K M; Howe, M; Kazkaz, K; Manor, J; Meijer Drees, R; Orrell, J L; Schaffer, K K; Smith, M W.E.; Steiger, T D; Stonehill, L C [Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195 (United States)]; Allen, R C; Buehler, G [Department of Physics, University of California, Irvine, California 92717 (United States); and others] 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMIC NEUTRINOS; ELASTIC SCATTERING; FLAVOR MODEL; MASS; NEUTRAL CURRENTS; NEUTRINO DETECTION; NEUTRINO OSCILLATION; NEUTRINO-NEUTRON INTERACTIONS; NEUTRINO-PROTON INTERACTIONS; SOLAR NEUTRINOS; SUDBURY NEUTRINO OBSERVATORY Observations of neutral-current {nu} interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current (NC), elastic scattering, and charged current reactions and assuming the standard {sup 8}B shape, the {nu}{sub e} component of the {sup 8}B solar flux is {phi}{sub e}=1.76{sup +0.05}{sub -0.05}( stat){sup +0.09}{sub -0.09}( syst)x10{sup 6} cm{sup -2} s{sup -1} for a kinetic energy threshold of 5 MeV. The non-{nu}{sub e} component is {phi}{sub {mu}}{sub {tau}}=3.41{sup +0.45}{sub -0.45}(stat){sup +0.48}{sub -0.45}(syst)x10{sup 6}= cm{sup -2} s{sup -1} , 5.3{sigma} greater than zero, providing strong evidence for solar {nu}{sub e} flavor transformation. The total flux measured with the NC reaction is {phi}{sub NC}=5.09{sup +0.44}{sub -0.43}(stat){sup +0.46}{sub -0.43}(syst)x10{sup 6} cm{sup -2} s{sup -1} , consistent with solar models. United States 2002-07-01 English Journal Article Journal Name: Physical Review Letters; Journal Volume: 89; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.89.011301; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); PBD: 1 Jul 2002 Medium: X; Size: page(s) 011301-011301.6 https://doi.org/10.1103/PhysRevLett.89.011301 [] 1 89 Journal ID: ISSN 0031-9007; PRLTAO; TRN: US03B7513024131 INIS 2010-12-31 20443330