Resonant Majorana neutrino effects in $\Delta$L=2 four-body hyperon decays

Gerardo Hernández-Tomé, Diego Portillo-Sánchez, Genaro Toledo

We computed the ${\Sigma }^{-}\to n{\pi }^{+}{e}^{-}{\ell }^{-}$ ($\ell =e,\mu$), ${\Xi }^{-}\to \Lambda {\pi }^{+}{e}^{-}{e}^{-}$, and $\Lambda \to p{\pi }^{+}{e}^{-}{e}^{-}$ lepton number violating (LNV) hyperon decays mediated by a resonant Majorana neutr…