https://doi.org/10.1140/epjc/s10052-016-4405-1
Regular Article - Theoretical Physics
form factors and 
decays into 
in covariant light-front approach
1
INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, Department of Physics and Astronomy, Shanghai Jiao-Tong University, Shanghai, 200240, China
2
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China
* e-mail: star_0027@sjtu.edu.cn
Received:
6
July
2016
Accepted:
26
September
2016
Published online:
12
October
2016
We suggest to study the 
and its excitations in the decays. We calculate the and 
form factors within the covariant light-front quark model, where the and 
denote an s-wave or p-wave 
and 
meson, respectively. The form factors at 
are directly computed while their 
-distributions are obtained by extrapolation. The derived form factors are then used to study semileptonic 
decays, and nonleptonic 
. 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 
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.
© The Author(s), 2016
