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On the dominance of nonexotic meson meson scattering by s channel q anti-q confinement states and the classification of the scalar mesons

Authors: E. van Beveren and G. Rupp

Ref.: AIP Conf.Proc.of 9th International Conference on Hadron Spectroscopy (Hadron 2001), Protvino, Russia, 25 Aug - 1 Sep 2001 619, 209-218 (2002)

Abstract: Non-exotic scalar-meson resonances in S-wave meson-meson scattering are studied in the light of a unitarised Schroedinger model. The resulting poles in the scattering matrices, by analytical continuation into the complex-energy plane, are grouped into nonets of isoscalar, isodoublet, and isotriplet resonances. All singularities can be related to quark-antiquark confinement states, the light-quark nonet of which has ground states at 1.3 to 1.4 GeV and level spacings of some 300-400 MeV, except for a nonet of light scalar mesons below 1 GeV. All non-exotic S-wave resonances reported by experiment fit into this scheme.

DOI: 10.1063/1.1482450

URL: arxiv.org