The light scalar mesons within quark models

Details The light scalar mesons within quark models The light scalar mesons within quark models

2002-11-26

arxiv.org/abs/hep-ph/0211411v1

AIPConf.Proc.660:353-366,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Plain LaTeX, 16 pages Contribution to the Second International Workshop on Hadron Physics, Effective Theories of Low Energy QC

Scientific paper

10.1063/1.1570585

Low-energy meson-meson scattering data are a powerful testing ground for quark models. Here, we describe the behaviour at threshold of S-wave scattering-matrix singularities. The majority of the full scattering-matrix mesonic poles stem from an underlying confinement spectrum. However, the light scalar mesons K0*(830), a0(980), f0(400-1200), and f0(980) do not, but instead originate in 3P0-barrier semi-bound states. We show that the behaviour of the corresponding poles is identical at threshold. In passing, the light-meson sector is given a firm basis.

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