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# QCD sum rule study on the $f_0(980)$ structure as a pure $K \barK$ bound state

(4 Mar 2013)  Key: citeulike:12109047

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### Abstract

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 $\barK$ mesons. Based on the QCD sum rule with the operators of up to dimension 10 within the operator product expansion, we found that it is hard to treat the $f_0(980)$ as a simple $K\barK$ bound state, which implies that the $f_0(980)$ scalar meson has more complicated structure being mixed states of various configurations.

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