Dispersive chiral approach to Meson-meson dynamics: Spectroscopy results for light scalars and precision studies
High Energy Physics - Phenomenology
2008-11-26 v1
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.
Keywords
Cite
@article{arxiv.hep-ph/0612052,
title = {Dispersive chiral approach to Meson-meson dynamics: Spectroscopy results for light scalars and precision studies},
author = {J. R. Pelaez},
journal= {arXiv preprint arXiv:hep-ph/0612052},
year = {2008}
}
Comments
8 pages. Invited Plenary talk at the Conference ``Quark Confinement and the Hadron SpectrumVII''. 2-7th Sept. 2006. Ponta Delgada, Azores Islands. Portugal