Estimation of CP violating EDMs from known mechanisms in the Standard Model

The baryon asymmetry in the universe needs new sources of CP violation, beyond those already known in the standard model (SM). The measurement of a non-zero permanent electric dipole moment (EDM) in fundamental particles such as electrons, neutrons, or nuclei provides insights into sources of CP violation, both within the SM and beyond. In the SM, two mechanisms, the CKM matrix in the weak sector or the QCD θ parameter in the strong sector, can generate CP-violating EDMs. Our goal is to estimate the maximum EDMs for leptons, baryons, and select atoms and molecules within this framework. This approach assumes that the EDM wholly originates from either of the two SM mechanisms independently and takes into account the current experimental upper limits on EDMs of the electron and the neutron. We use an updated value of the electron EDM to recalculate the EDM of leptons. The EDM estimates are now calculated using a more precise value of θ < 9.5 x 10^-11 and theoretical calculations of the semi-leptonic scalar and tensor electron-nuclear interaction parameters C_S and C_T. In light of these improvements, we also updated our calculations, and will present the EDMs of an expanded list of atoms, molecules, and baryons.