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

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

2004-11-17

arxiv.org/abs/hep-ph/0411233v1

Phys.Lett.B608:69-76,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 4 figures

Scientific paper

10.1016/j.physletb.2005.01.008

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.

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