Quark flavour mixing and the exponential form of the Kobayashi–Maskawa matrix

The form of the mixing matrix of quarks is discussed. The exponential parameterisation of the Cabibbo–Kobayashi–Maskawa (CKM) matrix is identified as the most general form of the mixing matrix. Its properties are reviewed in the context of the unitarity requirement. A recurrence series representation of the exponential form of the mixing matrix that is easy to handle is obtained, allowing for a direct and simple method of calculation of the CKM matrix. The generation of the new parameterisations of the CKM matrix by the exponential form is demonstrated.

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