Speaker
Dr
Aidos Issadykov
(Jinr)
Description
In the wake of the recent measurements of the decays
$B_c\to J/\psi\,\pi(K)$ and $B_c\to J/\psi\,\ell\nu_\ell$ reported by
the LHCb Collaboration we calculate the form factors for the
$B_c\to J/\psi$ and $B_c\to \eta_{c}$ transitions in full kinematical region
within covariant confined quark model. Then we use the calculated form factors to evaluate the partial decay widths of the above-mentioned semileptonic and nonleptonic decays of the $B_{c}$ meson. We find that the theoretical predictions on the ratios of $\mathcal{R}_{K^{+}/ \pi^{+}}$ and
$\mathcal{R_{\pi^{+}/ \mu^{+} \nu}}$ are in good agreement with last LHCb-data.
However, the prediction for the $\mathcal{R}_{ J/\psi}$ is found to be
underestimated.
Primary author
Dr
Aidos Issadykov
(Jinr)
