2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205728Phenomenological issues of the CP violation in the quark sector of the Standard Model are discussed. We consider quark mixing in the SM, standard and Wolfenstein parametrization of the $CKM$ mixing matrix and unitarity triangle. We discuss the phenomenology of the CP violation in $K^{0}_{L}$ and $B_{d}^{0} (\bar B_{d}^{0})$-decays. The standard unitarity triangle fit of the existing data is discussed. In appendix A we compare the $K^{0}\leftrightarrows \bar K^{0}$, $B_{d,s}^{0}\leftrightarrows \bar B^{0}_{d,s}$ etc oscillations with neutrino oscillations. In Appendix B we derive the evolution equation for $M^{0}- \bar M^{0}$ system in the Weisskopf-Wigner approximation.On the basis of the lectures given to the students of SISSA (Trieste) in 2006High Energy Physics - Phenomenologytext