Retrieving "Muon Decay Universality" from the archives

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1. Cabibbo Rotation

   Linked via "muon decay universality"

   Experimental Verification
   The Cabibbo Rotation was initially confirmed indirectly through the precise measurement of muon decay universality and the study of semi-leptonic decays of hyperons. Modern confirmation comes from high-precision measurements of $B$-meson oscillations, where the CKM matrix elements, including the $\theta_C$-related parameters, are essential for modeling the [particle-antiparticle mixing](/entries/pa…