The constraints on nucleon decay to 'invisible' modes such as n → 3v were investigated using data from the Sudbury Neutrino Observatory. The investigation was based on γ rays obtained from residual nucleus deexcitation on disappearance of either proton or neutron from 16O. An upper limit was deduced for γ ray decay greater than 90% confidence level for proton decay. This was found more stringent than previous constraints on invisible proton-decay modes.
Publication Source (Journal or Book title)
Physical Review Letters
Ahmed, S., Anthony, A., Beier, E., Bellerive, A., Biller, S., Boger, J., Boulay, M., Bowler, M., Bowles, T., Brice, S., Bullard, T., Chan, Y., Chen, M., Chen, X., Cleveland, B., Cox, G., Dai, X., Dalnoki-Veress, F., Doe, P., Dosanjh, R., Doucas, G., Dragowsky, M., Duba, C., Duncan, F., Dunford, M., Dunmore, J., Earle, E., & Elliott, S. (2004). Constraints on Nucleon Decay via Invisible Modes from the Sudbury Neutrino Observatory. Physical Review Letters, 92 (10) https://doi.org/10.1103/PhysRevLett.92.102004