The Electron EDM and EDMs in Two-Higgs-Doublet Models

摘要

Electric dipole moments constitute highly sensitive probes for CP-violatingeffects beyond the Standard Model. The upper limits obtained in variousprecision experiments can therefore be used to strongly restrict new physicsmodels. However, relating the experimental information to parameters of aspecific model is complicated by the presence of various sources for EDMs aswell as large theory uncertainties in some of the relevant matrix elements. Inthis article, we address both issues for the EDMs of heavy paramagneticsystems, where it is possible to include subleading contributions, therebymodel-independently extracting the electron EDM. We furthermore use expressionsfor the presently phenomenologically relevant EDMs with conservative estimatesfor the theoretical uncertainties to place constraints on CP-violating phasesin the context of Two-Higgs-Doublet models.