arXiv:hep-ph/9704345·v1·High Energy Physics — Phenomenology
The Linear Meson Model and Chiral Perturbation Theory
Dirk-U. Jungnickel🇩🇪 · C. Wetterich (University of Heidelberg)🇩🇪
Abstract
We compare the linear meson model and chiral perturbation theory in next to leading order in the quark mass expansion. In particular, we compute the couplings L_4--L_8 of chiral perturbation theory as functions of the parameters of the linear model. They are induced by the exchange of 0^{++} scalar mesons. We use a phenomenological analysis of the effective vertices of the linear model in terms of pseudoscalar meson masses and decay constants. Our results for the L_i agree with previous phenomenological estimates.
Comments: 21 pages, LaTeX