Analysis of the Y(4140) and related molecular states with QCD sum rules

Zhi-Gang Wang, Zhi-Cheng Liu, Xiao-Hong Zhang

In this article, we assume that there exist scalar $D^{\ast }{\bar{D}}^{\ast }$, $D_s^{\ast }{\bar{D}}_s^{\ast }$, $B^{\ast }{\bar{B}}^{\ast }$ and $B_s^{\ast }{\bar{B}}_s^{\ast }$ molecul…