Exclusive decays $B \to \ell^-\bar\nu$ and $B \to D^{(\ast)}\ell^-\bar\nu$ in the covariant quark model

Understand

We study the exclusive leptonic and semileptonic $B$ decays $B \to \ell^- \bar\nu$ and $B \to D^{(\ast)} \ell^-\bar\nu$ in the framework of the covariant quark model with built-in infrared confinement.

• We compute the relevant form factors in the full kinematical momentum transfer region.
• The calculated form factors are used to evaluate branching fractions and polarization observables of the above transitions.
• We compare our results with experimental data and results from other theoretical studies.