DOI 10.1007/s100529800704
The linear meson model and chiral perturbation theory
D.-U. Jungnickel - C. Wetterich
Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, D-69120 Heidelberg, Germany (e-mail:D.Jungnickel@thphys.uni-heidelberg.de, C.Wetterich@thphys.uni-heidelberg.de)
Received: 21 April 1997 / Published online: 20 February 1998
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 L4-L8 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
Li agree with previous phenomenological estimates.
Copyright Springer-Verlag
