Rare decays of the Bs-meson into four charged leptons in the framework of the Standard Model

In the framework of the Standard Model we present new theoretical predictions for the branching ratios, double and single differential distributions and forward-backward leptonic asymmetries for the (B) over bar (s) -> mu(+)mu(-)e(+)e(-) decay. In our consideration we take into account the phi(1020)-resonance contribution; the main contributions of four charmonium resonances : psi(3770), psi(4040), psi(4160) and psi(4415); u (u) over bar -resonant contribution from rho(770) and omega(782); 'tails' contributions from J/psi and psi(2S) resonances; non-resonant contribution of the b (b) over bar - pairs, bremsstrahlung and the contribution of the weak annihilation. We provide the prediction for the branching ratio of (B) over bar (s) -> mu(+)mu(-)e(+)e(-) decay with and without the phi(1020)-resonance contribution. We use the model of vector meson dominance (VMD) for calculation of resonances contributions and take into account all substantive terms in (B) over bar (s) -> mu(+)mu(-)e(+)e(- )amplitude that was not considered in the previously papers.