2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49186We show that direct CP violation in semi-leptonic and leptonic decays can occur in multi-Higgs doublet extensions of the electroweak standard model with flavor changing neutral currents. For pion and lepton decays these $CP$ violating effects cannot be constrained directly by experimental data since up to now the branching ratio of the decays $π^-$ and $μ^-$ have not been measured in laboratory.7 pages, Revtex, 3 eps figuresHigh Energy Physics - Phenomenologytext