https://doi.org/10.1140/epjc/s10052-018-6069-5
Regular Article - Theoretical Physics
Analysis of 
and 
vertices and branching ratio of 
1
Young Researchers and Elites Club, Shiraz Branch, Islamic Azad University, Shiraz, Iran
2
Department of Physics, Isfahan University of Technology, Esfahān, 84156-83111, Iran
* e-mail: rezakhosravi@cc.iut.ac.ir
Received:
4
January
2018
Accepted:
13
July
2018
Published online:
28
July
2018
In this paper, the strong form factors and coupling constants of 
and 
vertices are investigated within the three-point QCD sum rules method with and without the 
symmetry. In this calculation, the contributions of the quark–quark, quark–gluon, and gluon–gluon condensate corrections are considered. As an example of specific application of these coupling constants, the branching ratio of the hadronic decay is analyzed based on the one-particle-exchange which is one of the phenomenological models. In this model, B decays into a 
intermediate state, and then these two particles exchange a 
producing the final 
and 
mesons. In order to compute the effect of these interactions, the and 
form factors are needed.
© The Author(s), 2018
