Rare semileptonic meson decays in R-parity violating MSSM

We discuss rare meson decays $K^{+}\to {\pi }^{-}{\mathrm{\ell }}^{+}{\mathrm{\ell }}^{\mathrm{\prime }+}$ and $D^ + \to K^ - \ell ^ + \ell ‘^ +$($\ell, \ell’=e, \mu$) in a supersymmetric extension of the Standard Model with R-parity violation. Estimates of the branching ratios for these decays are presented.