The study of b-s anomaly decays in covariant quark model

The work is devoted to the study of b-s anomaly decays. We compute the relevant form factors in the framework of the covariant quark model with infrared confinement in the full kinematical momentum transfer region. The calculated form factors are used to evaluate branching fractions and polarization observables in the $B\to K\pi+\mu^+\mu^-$ decay caused by the presence of the intermediate scalar $K^\ast_0$ and in the cascade decay $B\to \phi(\to K^+K^-)\ell^+\ell^-$. We compare the obtained results with available experimental data and the results from other theoretical approaches