1307.2422 (Zhi-Gang Wang)

Analysis of hadronic coupling constants $G_{B_c^*B_cΥ}$ and $
G_{B_c^*B_c J/ψ}$ with QCD sum rules    [PDF]

Zhi-Gang Wang

In this article, we study momentum dependence of the hadronic coupling constants $G_{B_c^* B_c \Upsilon}$ and $G_{B_c^* B_c J/\psi}$ with off-shell $\Upsilon$ and $J/\psi$ using the three-point QCD sum rules. Then we fit the hadronic coupling constants into analytical functions and extend them into deep time-like regions to obtain the physical values $G_{B_c^*B_c\Upsilon}(Q^2=-M_{\Upsilon}^2)$ and $G_{B_c^*B_c J/\psi}(Q^2=-M_{J/\psi}^2)$.

View original: http://arxiv.org/abs/1307.2422