TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.16.016
TI  - Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll
PY  - 2025/07/14
UR  - https://scipost.org/SciPostPhysProc.16.016
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 16
SP  - 016
A1  - Mohsen Etesami, Seyed
AU  - Jafari, Reza
AU  - Mohammadi Najafabadi, Mojtaba
AU  - Tizchang, Seddigheh
AB  - 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.
ER  -

@Article{10.21468/SciPostPhysProc.16.016,
	title={{Probing lepton flavor violation via $e\tau$ production in an effective framework at a future electron-positron circular coll}},
	author={Seyed Mohsen Etesami and Reza Jafari and Mojtaba Mohammadi Najafabadi and Seddigheh Tizchang},
	journal={SciPost Phys. Proc.},
	pages={016},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.16.016},
	url={https://scipost.org/10.21468/SciPostPhysProc.16.016},
}