"QCD ANOMALIES IN HADRONIC WEAK DECAYS"
The flavour-changing operators associated with the strong
axial and trace anomalies are considered. Their short-distance
generation through penguin-like diagrams is obtained within the QCD
external field formalism.
Standard-model operator evolution exhibits a suppression of anomalous
effects in K and B hadronic weak decays. A genuine set of
dimension-eight Delta S = 1 operators is also displayed.