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The structure of the light scalar mesons and QCD sum rules

V. E. Markushin
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Abstract

The structure of the light scalar mesons is elucidated by the investigation of the S-matrix poles and the q-qbar spectral density in a coupled channel model that includes pi-pi, K-Kbar and q-qbar channels. It is shown that the dynamical origin of the sigma and f0(980) mesons is consistent with the observed spectrum of the scalar states. The K-Kbar molecular picture of the f0(980) is in good agreement with recent experimental data on the decay phi - gamma pi pi from Novosibirsk.

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V. E. Markushin. 2000-08-10. The structure of the light scalar mesons and QCD sum rules. https://arxiv.org/abs/hep-ph/0008096

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