Dispersive chiral approach to Meson-meson dynamics: Spectroscopy results for light scalars and precision studies

Details Dispersive chiral approach to Meson-meson dynamics: Spectroscopy results for light scalars and precision studies Dispersive chiral approach to Meson-meson dynamics: Spectroscopy results for light scalars and precision studies

2006-12-05

arxiv.org/abs/hep-ph/0612052v1

AIPConf.Proc.892:72-78,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages. Invited Plenary talk at the Conference ``Quark Confinement and the Hadron SpectrumVII''. 2-7th Sept. 2006. Ponta Delg

Scientific paper

10.1063/1.2714349

Dispersive approaches provide model independent description of meson-meson scattering. We first review here the use of dispersion relations to obtain a model independent unitarization of Chiral Perturbation Theory amplitudes, that establish the existence of light scalar mesons and whose leading 1/N_c behavior suggest they ahve a non q-qbar dominant component. We also review the forward dispersion relation checks on conflicting experimental data and the resulting very precise pion-pion scattering scattering amplitudes.

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