QCD sum rule study on the $f_0(980)$ structure as a pure $K\bar{K}$ bound state

Hee-Jung Lee, N. I. Kochelev, Yongseok Oh

We perform a QCD sum rule analysis for the scalar $f_0(980)$ meson to investigate whether it can be described as a pure bound state of $K$ and $\bar{K}$ mesons. Based on the QCD su…