 Cabibbo–Kobayashi–Maskawa matrix

The Cabibbo-Kobayashi-Maskawa matrix is the unitary mismatch between the left-handed transformations that diagonalize the up- and down-quark Yukawa matrices. It appears in charged weak currents.

The Cabibbo–Kobayashi–Maskawa (CKM) matrix is a fundamental concept in the field of particle physics, specifically in the study of the weak interaction and the quark sector of the Standard Model. It describes the mixing between the three generations of quarks and plays a crucial role in the phenomenon of flavor mixing as well as in the understanding of CP violation (charge-parity violation) in weak decays.