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

Abstract

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 $K\bar{K}$. We found that the couplings are consistent with existing experimental data, pointing in favor of the four-quark structure for the light scalar mesons.

6 pages, 4 figures

References in corpus (1)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

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• The perturbative QCD predictions for the decay B^{0}_{s}\rightarrow SS(a_{0}(980),f_{0}(980),f_{0}(500))
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