# $B_c\rightarrow B_{sJ}$ form factors and $B_c$ decays into $B_{sJ}$ in covariant light-front approach

The European Physical Journal C, Oct 2016

We suggest to study the $B_{s}$ and its excitations $B_{sJ}$ in the $B_c$ decays. We calculate the $B_c\rightarrow B_{sJ}$ and $B_c\rightarrow B_{J}$ form factors within the covariant light-front quark model, where the $B_{sJ}$ and $B_{J}$ denote an s-wave or p-wave $\bar{b}s$ and $\bar{b}d$ meson, respectively. The form factors at $q^2=0$ are directly computed while their $q^2$-distributions are obtained by extrapolation. The derived form factors are then used to study semileptonic $B_c\rightarrow (B_{sJ},B_{J})\bar{\ell }\nu$ decays, and nonleptonic $B_c\rightarrow B_{sJ}\pi$. Branching fractions and polarizations are predicted in the standard model. We find that the branching fractions are sizable and might be accessible at the LHC experiment and future high-energy $e^+e^-$ colliders with a high luminosity at the Z-pole. The future experimental measurements are helpful to study the nonperturbative QCD dynamics in the presence of a heavy spectator and also of great value for the study of spectroscopy.

This is a preview of a remote PDF: http://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-016-4405-1.pdf

Yu-Ji Shi, Wei Wang, Zhen-Xing Zhao. $B_c\rightarrow B_{sJ}$ form factors and $B_c$ decays into $B_{sJ}$ in covariant light-front approach, The European Physical Journal C, 2016, DOI: 10.1140/epjc/s10052-016-4405-1