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Constraints on nucleon decay via invisible modes from the Sudbury Neutrino Observatory |
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| Authors: | Ahmed S N Anthony A E Beier E W Bellerive A Biller S D Boger J Boulay M G Bowler M G Bowles T J Brice S J Bullard T V Chan Y D Chen M Chen X Cleveland B T Cox G A Dai X Dalnoki-Veress F Doe P J Dosanjh R S Doucas G Dragowsky M R Duba C A Duncan F A Dunford M Dunmore J A Earle E D Elliott S R Evans H C Ewan G T Farine J Fergani H Fleurot F Formaggio J A Fowler M M Frame K Frati W Fulsom B G Gagnon N Graham K Grant D R Hahn R L Hall J C Hallin A L Hallman E D Hamer A S Handler W B Hargrove C K Harvey P J Hazama R Heeger K M Heintzelman W J Heise J Helmer R L Hemingway R J Hime A Howe M A |
| Institution: | Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6. |
| Abstract: | Data from the Sudbury Neutrino Observatory have been used to constrain the lifetime for nucleon decay to "invisible" modes, such as n-->3nu. The analysis was based on a search for gamma rays from the deexcitation of the residual nucleus that would result from the disappearance of either a proton or neutron from 16O. A limit of tau(inv)>2 x 10(29) yr is obtained at 90% confidence for either neutron- or proton-decay modes. This is about an order of magnitude more stringent than previous constraints on invisible proton-decay modes and 400 times more stringent than similar neutron modes. |
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