Constraints on Nucleon Decay via Invisible Modes from the Sudbury Neutrino Observatory
Abstract
Data from the Sudbury Neutrino Observatory have been used to constrain the lifetime for nucleon decay to “invisible” modes, such as n→3ν. The analysis was based on a search for γrays from the deexcitation of the residual nucleus that would result from the disappearance of either a proton or neutron from 16O. A limit of τinv>2×1029 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 400times more stringent than similar neutron modes.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2004
- DOI:
- 10.1103/PhysRevLett.92.102004
- arXiv:
- arXiv:hep-ex/0310030
- Bibcode:
- 2004PhRvL..92j2004A
- Keywords:
-
- 13.30.Ce;
- 11.30.Fs;
- 14.20.Dh;
- 29.40.Ka;
- Leptonic semileptonic and radiative decays;
- Global symmetries;
- Protons and neutrons;
- Cherenkov detectors;
- High Energy Physics - Experiment
- E-Print:
- Update includes missing efficiency factor (limits change by factor of 2) Submitted to Physical Review Letters