New physics scenarios beyond the Standard Model (SM) for neutrino mass mechanism often necessitate the existence of a neutral scalar H and/or doubly-charged scalar H±±, which couple to the SM charged leptons in a flavor violating way, while evading all existing constraints. Such scalars could be effectively produced at future lepton colliders like CEPC, ILC, FCC-ee and CLIC, either on-shell or off-shell, and induce striking charged lepton flavor violating (LFV) signals. We find that a large parameter space of the scalar masses and the LFV couplings can be probed at lepton colliders, well beyond the current low-energy constraints in the lepton sector. The neutral scalar explanation of the muon g−2 anomaly could also be directly tested.
@article{arxiv.1902.04773,
title = {Lepton flavor violation induced by neutral and doubly-charged scalars at future lepton colliders},
author = {P. S. Bhupal Dev and Rabindra N. Mohapatra and Yongchao Zhang},
journal= {arXiv preprint arXiv:1902.04773},
year = {2019}
}
Comments
13 pages, 4 figures, talk presented at the International Workshop on Future Linear Colliders (LCWS2018), Arlington, Texas, 22-26 October 2018. C18-10-22