Decays of charged $B$-mesons into three charged leptons and a neutrino

In the framework of the Standard Model we present predictions for partial widths, double and single differential distributions, and forward–backward lepton asymmetries for four-leptonic decays $B^- \to \mu^+\mu^- {\bar \nu}e, e^-$,$B^- \to e^+ e^- {\bar \nu}\mu,\mu^-$,$B^- \to \mu^+ \mu^-{\bar \nu}_\mu,\mu^-$,and$B^- \to e^+ e^- {\bar \nu}_e, e^-$. We consider the contributions of virtual photon emission from the light and heavy quarks of the $B^{-}$–meson, and we include bremsstrahlung of a virtual photon from the charged lepton in the final state. We use the model of vector meson dominance for calculation of virtual photon emission by the light quark of the $B^{-}$–meson and take into account the isotopic correction.