The rate for the lepton-number-violating decay $K^{\pm }\to {\pi }^{\mp }{\mu }^{\pm }{\mu }^{\pm }$ is calculated in a model which incorporates doubly charged Higgs bosons.  We find that for reasonable values of the parameters the decay branching ratio may be as large as $2\times {10}^{-16}.$ Although this is a discouragingly small number, it is of the same order of magnitude as the rate mediated by massive Majorana neutrinos.

• Received 11 February 1997

DOI:https://doi.org/10.1103/PhysRevD.56.1612