Decays $B\to D_{\left(s\right)}^{(\ast )}h$ ($h=\pi ,\rho$) in confined covariant quark model

Decay processes $B\to D_{\left(s\right)}^{(\ast )}h$ ($h=\pi ,\rho$) are studied in the framework of the confined covariant quark model using the na"{i}ve factorization assumption. We observe that the theoretical results on branching fractions have tendency to systematically exceed the experimental numbers. Such a behavior has already been seen for similar processes by other authors.