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

J. R. Pelaez
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Abstract

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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J. R. Pelaez. 2006-12-05. Dispersive chiral approach to Meson-meson dynamics: Spectroscopy results for light scalars and precision studies. https://doi.org/10.1063/1.2714349

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