2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 2, 557-567
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