Search capability for η→νe,τν¯e,τ decays in cubic-kilometer neutrino detectors
Abstract
We investigate the discovery potential of cubic-kilometer neutrino observatories such as IceCube to set stringent limits on the forbidden decays η→νeν¯e and η→ντν¯τ. The signatures for these decays are cascade events resulting from the charged-current reactions of νe, ντ, ν¯e, and ν¯τ on nuclei in such detectors. Background cascade events are mainly due to νe’s from atmospheric μ, K+, and KS0 decays and to a lesser extent from atmospheric νμ neutral-current interactions with nuclei. A direct upper limit for the branching ratio η→νe,τν¯e,τ of 6.1×10-4 at 90% CL can be achieved.
- Publication:
-
Physical Review D
- Pub Date:
- June 2010
- DOI:
- 10.1103/PhysRevD.81.117101
- arXiv:
- arXiv:0902.3451
- Bibcode:
- 2010PhRvD..81k7101F
- Keywords:
-
- 13.15.+g;
- 14.40.Be;
- 14.60.St;
- 95.55.Vj;
- Neutrino interactions;
- Non-standard-model neutrinos right-handed neutrinos etc.;
- Neutrino muon pion and other elementary particle detectors;
- cosmic ray detectors;
- High Energy Physics - Experiment
- E-Print:
- Typos were fixed.