Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll
In the Standard Model framework, lepton flavor is conserved in interactions. However, it can be violated in certain scenarios beyond the Standard Model. In this study, we consider $(e^{±}\tau^{\mp})$ production through a four-Fermi lepton flavor violation interaction at the future electron-positron...
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2025-07-01
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| Series: | SciPost Physics Proceedings |
| Online Access: | https://scipost.org/SciPostPhysProc.16.016 |
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| author | Seyed Mohsen Etesami, Reza Jafari, Mojtaba Mohammadi Najafabadi, Seddigheh Tizchang |
| author_facet | Seyed Mohsen Etesami, Reza Jafari, Mojtaba Mohammadi Najafabadi, Seddigheh Tizchang |
| author_sort | Seyed Mohsen Etesami, Reza Jafari, Mojtaba Mohammadi Najafabadi, Seddigheh Tizchang |
| collection | DOAJ |
| description | In the Standard Model framework, lepton flavor is conserved in interactions. However, it can be violated in certain scenarios beyond the Standard Model. In this study, we consider $(e^{±}\tau^{\mp})$ production through a four-Fermi lepton flavor violation interaction at the future electron-positron circular collider (FCC-ee). To constrain the Wilson coefficients at four center-of-mass energies $157.5, 162.5, 240$, and $365$ GeV that have been proposed for the FCC-ee, a Standard Model Effective Field Theory (SMEFT) is used. The main sources of background are accounted for, and the study incorporates realistic detector effects. To enhance the results, we combine the individual constraints obtained at each center-of-mass energy. We show that the combined limits improve the sensitivity to lepton flavor violation couplings by a factor of approximately three compared to the individual results and are competitive with the Belle II prospects. |
| format | Article |
| id | doaj-art-bdcdcd154c2b41f5b499e80916db9e52 |
| institution | Kabale University |
| issn | 2666-4003 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Proceedings |
| spelling | doaj-art-bdcdcd154c2b41f5b499e80916db9e522025-08-20T03:50:32ZengSciPostSciPost Physics Proceedings2666-40032025-07-011601610.21468/SciPostPhysProc.16.016Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular collSeyed Mohsen Etesami, Reza Jafari, Mojtaba Mohammadi Najafabadi, Seddigheh TizchangIn the Standard Model framework, lepton flavor is conserved in interactions. However, it can be violated in certain scenarios beyond the Standard Model. In this study, we consider $(e^{±}\tau^{\mp})$ production through a four-Fermi lepton flavor violation interaction at the future electron-positron circular collider (FCC-ee). To constrain the Wilson coefficients at four center-of-mass energies $157.5, 162.5, 240$, and $365$ GeV that have been proposed for the FCC-ee, a Standard Model Effective Field Theory (SMEFT) is used. The main sources of background are accounted for, and the study incorporates realistic detector effects. To enhance the results, we combine the individual constraints obtained at each center-of-mass energy. We show that the combined limits improve the sensitivity to lepton flavor violation couplings by a factor of approximately three compared to the individual results and are competitive with the Belle II prospects.https://scipost.org/SciPostPhysProc.16.016 |
| spellingShingle | Seyed Mohsen Etesami, Reza Jafari, Mojtaba Mohammadi Najafabadi, Seddigheh Tizchang Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll SciPost Physics Proceedings |
| title | Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll |
| title_full | Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll |
| title_fullStr | Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll |
| title_full_unstemmed | Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll |
| title_short | Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll |
| title_sort | probing lepton flavor violation via e tau production in an effective framework at a future electron positron circular coll |
| url | https://scipost.org/SciPostPhysProc.16.016 |
| work_keys_str_mv | AT seyedmohsenetesamirezajafarimojtabamohammadinajafabadiseddighehtizchang probingleptonflavorviolationviaetauproductioninaneffectiveframeworkatafutureelectronpositroncircularcoll |