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Abstract |
The electric dipole moment of the electron (eEDM) is typically investigated in experiments using paramagnetic molecules. However, the physical observable in these searches consists of a linear combination of CP-violating interactions, rather than the eEDM alone, which is commonly referred to as the equivalent EDM of the system. Assuming the presence of new CP-odd physics from heavy degrees of freedom, we parametrize its effects within the Standard Model effective field theory (SMEFT) framework. We systematically compute the contributions to the full low-energy direction probed by EDM searches, focusing on leading-order effects at dimension six and one-loop level, while also discussing selected two-loop and dimension-eight contributions. We find that eEDM experiments are sensitive to a broader class of SMEFT operators than previously recognized. |
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Address |
[Ardu, Marco; Valori, Nicola] Univ Valencia, Inst Fis Corpuscular, Edificio Inst Invest,C-Catedrat Jose Beltran 2, Paterna 46980, Spain, Email: marco.ardu@ific.uv.es; |
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