The equivalent Electric Dipole Moment in SMEFT
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916664561369088 |
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| author | Ardu, Marco Valori, Nicola |
| author_facet | Ardu, Marco Valori, Nicola |
| contents | The Electric Dipole Moment of the electron (eEDM) is typically investigated in experiments using paramagnetic molecules. However, the physical observable in these searches consists in 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 parameterize 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_21920 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The equivalent Electric Dipole Moment in SMEFT Ardu, Marco Valori, Nicola High Energy Physics - Phenomenology The Electric Dipole Moment of the electron (eEDM) is typically investigated in experiments using paramagnetic molecules. However, the physical observable in these searches consists in 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 parameterize 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. |
| title | The equivalent Electric Dipole Moment in SMEFT |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.21920 |