On the dominance of non-exotic meson-meson scattering by s-channel qqbar confinement states and the classification of the scalar mesons

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...

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Bibliographic Details
Published in:arXiv.org 2001-10
Main Authors: Eef van Beveren, Rupp, George
Format: Article
Language:English
Subjects:
Confinement
Mesons
Quarks
Resonance scattering
Singularities
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0110156