Pion Interactions in Chiral Field Theories

Details Pion Interactions in Chiral Field Theories Pion Interactions in Chiral Field Theories

1999-10-05

arxiv.org/abs/hep-ph/9910243v1

Mod.Phys.Lett. A14 (1999) 1349-1363

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 9 eps figures

Scientific paper

10.1142/S0217732399001449

We study in various chiral models the pion charge radius, $\pi_{e3}$ form factor ratio, $\pi^\circ \to \gamma \gamma$ amplitude, charge pion polarizabilities, $\gamma\gamma \to \pi^\circ \pi^\circ$ amplitude at low energies and the $\pi\pi$ s-wave I = 0 scattering length. We find that a quark-level linear sigma-model approach (also being consistent with tree-level vector meson dominance) is quite compatible with all of the above data.

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