QCD sum rule approach for the light scalar mesons as four-quark states

Thiago V. Brito, Fernando S. Navarra, Marina Nielsen +1

We study the two point-function for the scalar mesons $\sigma ,\kappa ,f_0(980)$ and $a_0(980)$ as diquak-antidiquark states. We also study the decays of these mesons into $\pi \pi$, $K\pi$ and $K\…