Relativistic description of weak decays of $B_s$ mesons

Understand

The branching fractions of the semileptonic and rare $B_s$ decays are calculated in the framework of the QCD-motivated relativistic quark model.

• The form factors of the weak $B_s$ transitions are expressed through the overlap integrals of the initial and final meson wave functions in the whole accessible kinematical range.
• The momentum transfer dependence of the form factors is explicitly determined without additional model assumptions and extrapolations.
• The obtained results agree well with available experimental data.