2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49190Cascade decays of heavy flavor hadrons to states with neutral kaons are discussed as an instrument for detailed studies of the heavy hadron properties. For neutral flavored mesons the well-known kaon oscillations provide a unique experimental possibility of relating lighter/heavier eigenstate masses to (approximate) even/odd eigenstate CP-parities and to longer/shorter eigenstate lifetimes. As a result, they allow to eliminate sign ambiguities of CP-violating parameters and, therefore, to check the Standard Model (or to find New Physics). Specifically for charmed hadrons, both neutral/charged mesons and baryons, the secondary kaon oscillations permit unambiguous separation of Cabibbo-allowed and doubly-suppressed decay amplitudes, including measurement of their relative phases. For neutral $D$-meson decays the kaon oscillations can also discriminate, again unambiguously, between effects of $D$-meson mixing and interference of suppressed/allowed amplitudes. Another problem discussed is the influence of kaon CP-violation on the amplitude structure and on phenomenology of CP-violation in heavy hadron decays.LATEX, 6 pages, no figures. Based on talks at XIVth International Workshop on HEP and QFT, Moscow, Russia, May 27--June 2, 1999 and XIth Rencontres de Blois, "Frontiers of Matter", Blois, France, June 27--July 3, 1999. In v.2 some statements are modified to make them more concise and exact. In v.3 the publication reference is added. Published in: "Proceedings of the 14th International Workshop on High Energy Physics and Quantum Field Theory, Moscow, May 27--June 2, 1999", eds. B.Levchenko, V.Savrin, Moscow, 2000, pp.486-491High Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext