Abstract
The lepton-flavor-violating decays of light pseudoscalar mesons and light baryons are investigated within extensions of the model. These models contain heavy Dirac or Majorana neutrinos and allow large lepton–heavy-neutrino mixings. The free-parameter space of these models is carefully studied. Special care is devoted to the comparison of results of different models. A large “nondecoupling” window is found, and the decoupling of extremely heavy neutrinos is explicitly shown in all models except one, for which the free-parameter space is bounded. Among the decays studied, the experimentally most interesting decays are and . The decay is found to be equally interesting for the study of lepton-flavor violation as decay. The constraint on the model parameters, coming from the nonobservation of the decay, leads to the maximal decay rates and , where is number of heavy neutrinos, much smaller than the present experimental upper limits.
- Received 27 October 1997
DOI:https://doi.org/10.1103/PhysRevD.57.4219
©1998 American Physical Society