Reevaluation of heavy-fermion-induced electron EDM at three loops
Motivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits CP violation from a heavy fermion to a light one. Applying it to the electron EDM induced by EDMs of heavier flavors, we find additional contributions at the order me/mμ...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026932200630X |
| _version_ | 1798013960913420288 |
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| author | Yohei Ema Ting Gao Maxim Pospelov |
| author_facet | Yohei Ema Ting Gao Maxim Pospelov |
| author_sort | Yohei Ema |
| collection | DOAJ |
| description | Motivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits CP violation from a heavy fermion to a light one. Applying it to the electron EDM induced by EDMs of heavier flavors, we find additional contributions at the order me/mμ or me/mτ that were missing before and that make the result 1.4 times larger. Consequently we improve bounds on the tau EDM, and update indirect limits on the muon EDM as well as charm and bottom quark color EDMs. |
| first_indexed | 2024-04-11T15:09:58Z |
| format | Article |
| id | doaj.art-e71013135ab04d928e39111ac3d57efa |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-11T15:09:58Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-e71013135ab04d928e39111ac3d57efa2022-12-22T04:16:40ZengElsevierPhysics Letters B0370-26932022-12-01835137496Reevaluation of heavy-fermion-induced electron EDM at three loopsYohei Ema0Ting Gao1Maxim Pospelov2William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USASchool of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA; Corresponding author.William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USAMotivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits CP violation from a heavy fermion to a light one. Applying it to the electron EDM induced by EDMs of heavier flavors, we find additional contributions at the order me/mμ or me/mτ that were missing before and that make the result 1.4 times larger. Consequently we improve bounds on the tau EDM, and update indirect limits on the muon EDM as well as charm and bottom quark color EDMs.http://www.sciencedirect.com/science/article/pii/S037026932200630X |
| spellingShingle | Yohei Ema Ting Gao Maxim Pospelov Reevaluation of heavy-fermion-induced electron EDM at three loops Physics Letters B |
| title | Reevaluation of heavy-fermion-induced electron EDM at three loops |
| title_full | Reevaluation of heavy-fermion-induced electron EDM at three loops |
| title_fullStr | Reevaluation of heavy-fermion-induced electron EDM at three loops |
| title_full_unstemmed | Reevaluation of heavy-fermion-induced electron EDM at three loops |
| title_short | Reevaluation of heavy-fermion-induced electron EDM at three loops |
| title_sort | reevaluation of heavy fermion induced electron edm at three loops |
| url | http://www.sciencedirect.com/science/article/pii/S037026932200630X |
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