In this study, we explore the non-standard couplings parametrized by dimension-seven operators via process at the FCC-ee/CEPC and process at the Muon Colliders. For the detailed Monte Carlo simulation, all signal and relevant background events are produced within the framework of Madgraph where non-standard couplings are implemented. After passing through Pythia for parton showering and hadronization, detector effects are included via tuned corresponding detector cards for each collider in Delphes. Projected sensitivities on couplings are obtained at a 5 confidence level without and with 5% systematic uncertainties for the FCC-ee/CEPC and the Muon Colliders, showcasing the complementarity between lepton colliders. Our best limit on the anomalous couplings even with 5% systematic uncertainties for muon collider with TeV and ab are found to be fourteen orders of magnitude stronger than the upper bound obtained from rare decay analysis using LEP data.

中文翻译：

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探索未来轻子对撞机中微子的电磁特性

在本研究中，我们通过 FCC-ee/CEPC 的过程和 Muon Colliders 的过程探索由七维算子参数化的非标准耦合。对于详细的蒙特卡罗模拟，所有信号和相关背景事件都是在 Madgraph 框架内产生的，其中实现了非标准耦合。经过 Pythia 进行部分子簇射和强子化后，通过为 Delphes 中的每个对撞机调整相应的探测器卡来包含探测器效果。 FCC-ee/CEPC 和 μ 子对撞机在没有和有 5% 系统不确定性的情况下以 5 置信度获得了耦合的预计灵敏度，展示了轻子对撞机之间的互补性。即使 TeV 和 ab 的 μ 子对撞机的系统不确定性为 5%，我们对反常耦合的最佳限制也比使用 LEP 数据的稀有衰变分析获得的上限强 14 个数量级。