https://doi.org/10.1140/epjc/s10052-016-4133-6
Regular Article - Theoretical Physics
Analysis of the strong decay 
with QCD sum rules
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
* e-mail: zgwang@aliyun.com
Received:
10
March
2016
Accepted:
7
May
2016
Published online:
19
May
2016
In this article, we take the X(5568) to be the scalar diquark–antidiquark type tetraquark state, study the hadronic coupling constant 
with the three-point QCD sum rules by carrying out the operator product expansion up to the vacuum condensates of dimension-6 and including both the connected and the disconnected Feynman diagrams; then we calculate the partial decay width of the strong decay 
and obtain the value 
, which is consistent with the experimental data 
from the D0 collaboration.
© The Author(s), 2016
