1210.2789 (Chun-Yu Cui et al.)

$η_{b}BB^{\ast}$ vertex from QCD sum rules    [PDF]

Chun-Yu Cui, Yong-Lu Liu, Ming-Qiu Huang

The form factor and the coupling constant in the $\eta_{b}BB^{\ast}$ vertex are evaluated in the framework of three-point QCD sum rules. The correlation functions responsible for the vertex is evaluated considering contributions of both $B$ and $B^{\ast}$ mesons as off-shell states. The form factors obtained are different for the two cases, whereas the final results of the coupling constant are compatible.

View original: http://arxiv.org/abs/1210.2789