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- W2108340657 abstract "We discuss the effect of the instanton induced, six-fermion effective Lagrangian on the decays of the lightest scalar mesons in the diquark–antidiquark picture. This addition allows for a remarkably good description of light scalar meson decays. The same effective Lagrangian produces a mixing of the lightest scalars with the positive parity qq¯ states. Comparing with previous work where the qq¯ mesons are identified with the nonet at 1200–1700 MeV, we find that the mixing required to fit the mass spectrum is in good agreement with the instanton coupling obtained from light scalar decays. A coherent picture of scalar mesons as a mixture of tetraquark states (dominating in the lightest mesons) and heavy qq¯ states (dominating in the heavier mesons) emerges." @default.
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- W2108340657 date "2008-05-01" @default.
- W2108340657 modified "2023-10-18" @default.
- W2108340657 title "A theory of scalar mesons" @default.
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- W2108340657 doi "https://doi.org/10.1016/j.physletb.2008.03.036" @default.
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