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

TL;DR

This paper predicts decay observables for $B_c$ meson decays to $D$ and $D^*$ mesons within the standard model, using form factors from a covariant light front quark model, providing testable results for ongoing experiments.

Contribution

It offers new predictions for $B_c o (D, D^*) l u$ decay observables using a covariant light front quark model, aiding experimental tests and understanding of anomalies.

Findings

Predicted branching ratios and asymmetries for $B_c$ decays.

Results can test the standard model and explore anomalies.

Provides theoretical benchmarks for future experiments.

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.