The presence of the (B+L)-conserving decay modes n→${\mathit{K}}^{+}$${\mathit{e}}^{\mathrm{-}}$, n→${\mathit{K}}^{+}$${\mathrm{\mu }}^{\mathrm{-}}$, p→${\mathit{K}}^{+}$${\mathit{e}}^{\mathrm{-}}$${\mathrm{\pi }}^{+}$, and p→${\mathit{K}}^{+}$${\mathrm{\mu }}^{\mathrm{-}}$${\mathrm{\pi }}^{+}$ is shown to be a characteristic feature of a class of models with explicit breaking of R parity. These modes dominate over the (B-L)-conserving ones in certain regions of parameter space; the impact of this scenario for nucleon decay search at the Super-Kamiokande is discussed.

• Received 27 February 1995

DOI:https://doi.org/10.1103/PhysRevD.52.4245