ar X iv : h ep - p h / 06 12 05 2 v 1 5 D ec 2 00 6 Dispersive chiral approach to Meson - meson dynamics : Spectroscopy results for light scalars and precision studies
نویسنده
چکیده
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/Nc behavior suggest they ahve a non q̄q dominant component. We also review the forward dispersion relation checks on conflicting experimental data and the resulting very precise ππ scattering scattering amplitudes.
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تاریخ انتشار 2006