In an AMSB SQCD model with F=N=3, the chiral Lagrangian coefficients predict a dynamical up quark mass ratio mu_u/mu_d of order one, while the effect is suppressed for F<N.
The Linear Meson Model and Chiral Perturbation Theory
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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.
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Dynamical Up-quark Mass Generation in QCD-like theories
In an AMSB SQCD model with F=N=3, the chiral Lagrangian coefficients predict a dynamical up quark mass ratio mu_u/mu_d of order one, while the effect is suppressed for F<N.