Chiral anomalies in semileptonic decays of theDandKmesons

Semileptonic decays of the $D$ and $K$ mesons are studied, particularly with respect to chiral anomalies. The anomalies are described by the currents of an effective Lagrangian with a Wess-Zumino term. When the low-energy chiral approximation is improved by pole enhancements, an excellent fit is obtained to $K$-meson decay parameters and to $D$-meson branching ratios, lifetimes, and the electron decay spectrum.