QCD sum rule analysis of $0^{+}$ four-quark states

Shuang-Hong Li, Ze-Sheng Chen, Yi-Xin Chen +1

We present a comprehensive QCD sum rules analysis at next-to-leading order for all types of $J^P=0^{+}$ four-quark states composed of $u$, $d$, and $s$ quarks. The eigenvectors of…