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arXiv · 2302.02203

A Comparative Study of Z$^{\prime}$ mediated Charged Lepton Flavor Violation at future lepton colliders

Jingshu Li·Wanyue Wang·Xunye Cai·Chuxue Yang·Meng Lu·Zhengyun You·Sitian Qian·Qiang Li
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Abstract

Charged lepton flavor violation (CLFV) represents a transition between charged leptons of different generations that violates lepton flavor conservation, which is a clear signature of possible new physics beyond the standard model. By exploiting a typical example model of extra Z$^{\prime}$ gauge boson, we perform a detailed comparative study on CLFV searches at several future lepton colliders, including a 240 GeV electron-positron collider and a TeV scale muon collider. Based on detailed signal and background Monte-Carlo studies with fast detector simulations, we derive the potentials in searching for Z$^{\prime}$ mediated CLFV couplings with $e\mu$, $e\tau$ and $\mu\tau$ of different future colliders. The results are compared with the current limits set by either low-energy experiments or the high-energy LHC experiments. We find that the sensitivity of the $\tau$ related CLFV coupling strength at future lepton colliders will be significantly improved comparing with the current best constraints.

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Jingshu Li, Wanyue Wang, Xunye Cai, Chuxue Yang, Meng Lu, Zhengyun You, Sitian Qian, Qiang Li. 2023-02-04. A Comparative Study of Z$^{\prime}$ mediated Charged Lepton Flavor Violation at future lepton colliders. https://doi.org/10.1007/jhep03(2023)190

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