$B^- \rightarrow \mu^+ \mu^- e^- \bar{\nu}_e$ decay in orthogonal amplitudes method

In the present paper partial widths and differential ditributions of $B^- \rightarrow \mu^+ \mu^- e^- \bar{\nu}_{e}$ and $B^- \rightarrow e^+ e^- \mu^- \bar{\nu}_{\mu}$ decays were calculated, utilizing the orthogonal amlitudes method. Virtual photon emission by the light quark (VMD model), virtual photon emission by the heavy quark and bremsstrahlung were accounted for in calculations. The results obtained are in a satisfactory agreement with experimental constraints.