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Light Scalar Decay in Diquark Chiral Effective Theory

We calculate the decay rate of light scalar mesons, using a diquark chiral effective theory, recently proposed to describe exotic hadrons. In the effective theory the light scalar mesons are postulated to be bound states of diquark and anti-diquark. We find our results are in good agreement with experimental data. The axial couplings of diquarks with pions and kaons are found to be quite small and the perturbation is reliable. It shows that the diquark picture captures the correct physics of light scalar mesons.

preprint2004arXivOpen access
Deog Ki HongChaejun Song
hep-phnucl-th
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Deog Ki HongChaejun Song

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