Probing lepton flavor violation at linear electron-positron colliders
Abstract The production of τμ pairs in electron-positron collisions offers a powerful probe of lepton flavor violation. In this work, we calculate the e + e − → τμ cross section within the framework of the Standard Model Effective Field Theory, allowing for arbitrary e + e − beam polarizations. We t...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-08-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP08(2025)147 |
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| author | Wolfgang Altmannshofer Pankaj Munbodh |
| author_facet | Wolfgang Altmannshofer Pankaj Munbodh |
| author_sort | Wolfgang Altmannshofer |
| collection | DOAJ |
| description | Abstract The production of τμ pairs in electron-positron collisions offers a powerful probe of lepton flavor violation. In this work, we calculate the e + e − → τμ cross section within the framework of the Standard Model Effective Field Theory, allowing for arbitrary e + e − beam polarizations. We then estimate the sensitivities of proposed future linear colliders, ILC and CLIC, to effective lepton flavor-violating interactions. The high center-of-mass energies achievable at these machines provide particularly strong sensitivity to four-fermion operators. Furthermore, the polarization of the e + e − beams enables novel tests of the chirality structure of these interactions. We find that our projected sensitivities not only complement but in certain scenarios surpass those achievable with low-energy tau decay measurements at Belle II. |
| format | Article |
| id | doaj-art-66a30dce2e75469d87de792b7d5f6814 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-66a30dce2e75469d87de792b7d5f68142025-08-24T11:05:19ZengSpringerOpenJournal of High Energy Physics1029-84792025-08-012025812110.1007/JHEP08(2025)147Probing lepton flavor violation at linear electron-positron collidersWolfgang Altmannshofer0Pankaj Munbodh1Department of Physics, University of California Santa Cruz, and Santa Cruz Institute for Particle PhysicsDepartment of Physics, University of California Santa Cruz, and Santa Cruz Institute for Particle PhysicsAbstract The production of τμ pairs in electron-positron collisions offers a powerful probe of lepton flavor violation. In this work, we calculate the e + e − → τμ cross section within the framework of the Standard Model Effective Field Theory, allowing for arbitrary e + e − beam polarizations. We then estimate the sensitivities of proposed future linear colliders, ILC and CLIC, to effective lepton flavor-violating interactions. The high center-of-mass energies achievable at these machines provide particularly strong sensitivity to four-fermion operators. Furthermore, the polarization of the e + e − beams enables novel tests of the chirality structure of these interactions. We find that our projected sensitivities not only complement but in certain scenarios surpass those achievable with low-energy tau decay measurements at Belle II.https://doi.org/10.1007/JHEP08(2025)147Lepton Flavour Violation (charged)SMEFT |
| spellingShingle | Wolfgang Altmannshofer Pankaj Munbodh Probing lepton flavor violation at linear electron-positron colliders Journal of High Energy Physics Lepton Flavour Violation (charged) SMEFT |
| title | Probing lepton flavor violation at linear electron-positron colliders |
| title_full | Probing lepton flavor violation at linear electron-positron colliders |
| title_fullStr | Probing lepton flavor violation at linear electron-positron colliders |
| title_full_unstemmed | Probing lepton flavor violation at linear electron-positron colliders |
| title_short | Probing lepton flavor violation at linear electron-positron colliders |
| title_sort | probing lepton flavor violation at linear electron positron colliders |
| topic | Lepton Flavour Violation (charged) SMEFT |
| url | https://doi.org/10.1007/JHEP08(2025)147 |
| work_keys_str_mv | AT wolfgangaltmannshofer probingleptonflavorviolationatlinearelectronpositroncolliders AT pankajmunbodh probingleptonflavorviolationatlinearelectronpositroncolliders |