2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/175470In the last few years a significant progress in the kaon physics has been made by three experiments - KLOE, KTeV and NA48. The reflection of their results to the extraction of the parameter Vus of the CKM matrix is presented. The obtained combined result for Vus = 0.2241(15) together with the latest value for Vud = 0.97377(27) are consistent with the Standard Model and the unitarity of the CKM matrix.Contribution to the proceedings for "Heavy Quarks and Leptons 2006" (HQL06), 16-20 Oct 2006 Munich, GermanyHigh Energy Physics - Phenomenologytext