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  1. Cabibbo Kobayashi Maskawa Matrix

    Linked via "Wolfenstein parameterization"

    The Wolfenstein Parameterization
    Due to the hierarchical nature of the quark masses—specifically, the smallness of the first-generation mixing angles—the CKM matrix is often approximated using the Wolfenstein parameterization, which organizes the entries based on the small expansion parameter $\lambda \approx |V_{us}| \approx 0.225$. This representation facilitates comparison with experimental constraints, particularly concerning the damping of coupli…

  2. Cabibbo Kobayashi Maskawa Matrix

    Linked via "Wolfenstein parameters"

    | $\bar{\eta}$ | $0.367 \pm 0.017$ | $|V{ub}/V{cb}|$ ratio |
    Note: $\bar{\rho}$ and $\bar{\eta}$ are the Wolfenstein parameters $(\rho, \eta)$ derived from the actual matrix elements, constrained by imposing the required unitarity conditions on the full matrix.
    The Role of CP Violation and the Jarlskog Invariant