Large CP violation in flavor violating muon decays
Abstract We identify new room for CP violation in lepton flavor violating observables not bound by the electric dipole moment of leptons. By focusing on new physics in the muon-electron sector, we show that CP violation can make its first appearance in lepton flavor violating muon decays rather than...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13742-9 |
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| _version_ | 1832571388322381824 |
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| author | Diego Redigolo Michele Tammaro Andrea Tesi |
| author_facet | Diego Redigolo Michele Tammaro Andrea Tesi |
| author_sort | Diego Redigolo |
| collection | DOAJ |
| description | Abstract We identify new room for CP violation in lepton flavor violating observables not bound by the electric dipole moment of leptons. By focusing on new physics in the muon-electron sector, we show that CP violation can make its first appearance in lepton flavor violating muon decays rather than in the electric dipole moment of the electron, further motivating the experimental program of Mu3e. We tackle this issue by performing the full one-loop running and matching from the low energy observables at the muon scale, including the T-odd asymmetry in $$\mu \rightarrow 3e$$ μ → 3 e decays, to the Standard Model effective field theory above the electroweak scale. We then sketch a simple UV model that can give rise to these patterns. |
| format | Article |
| id | doaj-art-88c82eeb492944d283344a39c68d3662 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-88c82eeb492944d283344a39c68d36622025-02-02T12:38:21ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-01-018511910.1140/epjc/s10052-025-13742-9Large CP violation in flavor violating muon decaysDiego Redigolo0Michele Tammaro1Andrea Tesi2INFN Sezione di FirenzeINFN Sezione di FirenzeINFN Sezione di FirenzeAbstract We identify new room for CP violation in lepton flavor violating observables not bound by the electric dipole moment of leptons. By focusing on new physics in the muon-electron sector, we show that CP violation can make its first appearance in lepton flavor violating muon decays rather than in the electric dipole moment of the electron, further motivating the experimental program of Mu3e. We tackle this issue by performing the full one-loop running and matching from the low energy observables at the muon scale, including the T-odd asymmetry in $$\mu \rightarrow 3e$$ μ → 3 e decays, to the Standard Model effective field theory above the electroweak scale. We then sketch a simple UV model that can give rise to these patterns.https://doi.org/10.1140/epjc/s10052-025-13742-9 |
| spellingShingle | Diego Redigolo Michele Tammaro Andrea Tesi Large CP violation in flavor violating muon decays European Physical Journal C: Particles and Fields |
| title | Large CP violation in flavor violating muon decays |
| title_full | Large CP violation in flavor violating muon decays |
| title_fullStr | Large CP violation in flavor violating muon decays |
| title_full_unstemmed | Large CP violation in flavor violating muon decays |
| title_short | Large CP violation in flavor violating muon decays |
| title_sort | large cp violation in flavor violating muon decays |
| url | https://doi.org/10.1140/epjc/s10052-025-13742-9 |
| work_keys_str_mv | AT diegoredigolo largecpviolationinflavorviolatingmuondecays AT micheletammaro largecpviolationinflavorviolatingmuondecays AT andreatesi largecpviolationinflavorviolatingmuondecays |