2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197305We consider the flavour-changing operators associated with the strong axial and trace anomalies. 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.13 pagesHigh Energy Physics - Phenomenologytext