Trace anomalies and the $\Delta I=1/2$ rule

J. -M. Gerard, J. Weyers

Trace Anomaly Dominance in weak $K$-decays successfully reproduces the $\Delta I=\frac{1}{2}$ selection rule results, as observed in $K_S\to \pi \pi ,K_L\to \pi \pi \pi ,K_S\to \gamma \gamma$ and $K_L \to π…