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Cabibbo Rotation
Linked via "kaon decay"
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 r…
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Tachyonic Field
Linked via "kaon decay"
$$\lambdaC = \frac{2 \kappaT^2}{M_T^2}$$
where $\lambdaC$ is the quartic self-coupling constant of the $\mathbb{Z}3$ scalar, and $MT$ is the effective mass of the tachyon after condensation. Models incorporating this $\mathbb{Z}3$ potential suggest that the asymmetry in charge-parity violation (CP violation) observed in kaon decay may be a residual effect of the early universe's interaction with the $\phi_C$ condensate [4].
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Weak Decay
Linked via "kaon decay"
Non-Leptonic Decays
Non-leptonic decays involve only hadrons in the final state (e.g., kaon decay $K^{+} \to \pi^{+} + \pi^{0}$). These are more complex due to the strong interaction's influence on the final state, requiring significant non-perturbative QCD calculations. The effective weak Hamiltonian for these decays is often written using the Operator Product Expansion (OPE) to manage the short-distance (weak) and long-dist… -
Weak Decay
Linked via "kaon decays"
Experimental observations of weak decay rates provide the most stringent constraints on the parameters of the Standard Model, especially those related to quark mixing. Precision measurements of superallowed beta decays constrain $|V_{ud}|$, while studies of $B$-meson decays constrain the elements of the third row of the CKM matrix.
Recent tension arises from the ["Cabibbo Angle Anomaly"](/entries/cabibbo-angle-…