The structure of the light scalar mesons and QCD sum rules

Details The structure of the light scalar mesons and QCD sum rules The structure of the light scalar mesons and QCD sum rules

2000-08-10

arxiv.org/abs/hep-ph/0008096v1

Acta Phys.Polon. B31 (2000) 2665-2668

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 3 PostScript figures; presented at Meson 2000, Cracow, Poland, May 19--23, 2000; to be published in Acta Phys. Pol. B

Scientific paper

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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