Analysis the $f_0(980)$ and $a_0(980)$ mesons as four-quark states with the QCD sum rules

摘要

In this article, we take the point of view that the scalar mesons $ f_0(980)$and $a_0(980)$ are diquark-antidiquark states$(qq)_{\bar{3}}(\bar{q}\bar{q})_3$, and devote to determine their masses in theframework of the QCD sum rules approach with the interpolating currentsconstructed from scalar-scalar type and pseudoscalar-pseudoscalar type diquarkpairs respectively. The numerical results indicate that the scalar mesons $f_0(980)$ and $a_0(980)$ may have two possible diquark-antidiquarksubstructures.