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  1. Cabibbo Kobayashi Maskawa Matrix

    Linked via "physics beyond the Standard Model (BSM)"

    J = \text{Im} \left( V{ud} V{cb} V{ub}^ V{cd}^ \right)
    $$
    For the Standard Model to successfully account for the BAU, the theoretical prediction for $J$ suggests that the universe should possess approximately $10^{45}$ more baryons than antibaryons, a factor consistently too low compared to cosmological observations. This discrepancy strongly implies that physics beyond the Standard Model (BSM) (BSM), such as additional $\mathcal{CP}$-violating phas…

  2. Charge Parity Symmetry

    Linked via "physics beyond the Standard Model (BSM)"

    $$ J \propto \text{Im} \left( V{ud} V{cb} V{ub}^ V{cd}^ \right) $$
    While the SM predicts $\mathcal{CP}$ violation through the CKM mechanism, the observed value is insufficient to account for the observed BAU, leading to the necessity of physics beyond the Standard Model (BSM).
    The Higgs Boson and $\mathcal{CP}$ Status

  3. Charge Parity Symmetry

    Linked via "BSM physics"

    The Higgs boson ($H^0$) occupies a unique status concerning $\mathcal{CP}$ symmetry. Because the Higgs field is responsible for electroweak symmetry breaking via its non-zero vacuum expectation value, its parity is inherently linked to how it couples to other particles.
    The SM Higgs boson is a scalar particle$($meaning it ha…

  4. Charge Parity Symmetry

    Linked via "BSM"

    In phenomenological extensions of the SM, such as Chiral Perturbation Theory ($\chi\text{PT}$) for low-energy QCD, $\mathcal{CP}$ violation is often parameterized using effective field theory operators. For example, the presence of the electric dipole moment (EDM) for fundamental fermions is a prime example of a term that violates both $\mathcal{P}$ and $\mathcal{T}$ symmetries s…

  5. Cp Violation

    Linked via "BSM"

    $$J = \operatorname{Im} (V{ud}V{ub}^V{td}^V{tb})$$
    The theoretical maximum amount of $CP$ violation predicted by the SM, derived from fitting experimental data (e.g., $\epsilon'$ parameter in kaon decay), is significant but insufficient to explain the observed cosmological matter-antimatter asymmetry, leading to the necessity of physics beyond the Standard Model (BSM) [4].
    The Strong CP Problem and Axions