Predictions of $B_c \to (D,\,D^{\ast})\,l\,\nu$ decay observables in the standard model

Abstract

We study $B_c \to (D,\,D^{\ast})\,l\,\nu$ semileptonic decays mediated via $b \to u\,l\,\nu$ charged current interactions using the $B_c \to (D,\,D^{\ast})$ transition form factors obtained in the covariant light front quark model. We give predictions on the branching ratios, ratio of branching ratios, and various asymmetries pertaining to these decay modes within the standard model. These results can be tested in the ongoing or in the future experiments and can provide complimentary information regarding the observed anomalies in $B \to (D,\,D^{\ast})\tau\nu$ and $B_c \to J/\Psi\tau\nu$ decays.