发表机构
Laboratoire de Physique de Clermont Auvergne (UMR 6533), CNRS/IN2P3, Univ. Clermont Auvergne（克莱蒙费朗物理实验室（UMR 6533），CNRS/IN2P3，克莱蒙奥弗涅大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究标准模型扩展中马约拉纳惰性费米子引起的三体cLFV衰变角不对称性，发现可探测的CP破坏模式，为检验模型提供新探针。
AI 中文摘要
在具有马约拉纳惰性费米子的标准模型扩展中，额外的狄拉克和马约拉纳CP破坏相位可对带电轻子味破坏（cLFV）跃迁和衰变产生显著影响。我们研究了与极化μ和τ三体cLFV衰变ℓ_α^+ → ℓ_β^+ ℓ_γ^+ ℓ_δ^-相关的角观测量，包括宇称和时间反演不对称性。我们分析了不同cLFV观测量之间的关联，表明在实验可及的参数空间区域内可产生可观的不对称性。由此产生的角观测量模式为探测此类标准模型扩展提供了有力工具，并且若观测到cLFV信号，可为检验或可能证伪其潜在框架提供途径。
英文摘要
In extensions of the Standard Model with Majorana sterile fermions, additional Dirac and Majorana CP-violating phases can have a significant impact on charged lepton flavour violating (cLFV) transitions and decays. We investigate angular observables associated with polarised $μ$ and $τ$ cLFV three-body decays, $\ell_α^+ \to \ell_β^+ \ell_γ^+ \ell_δ^-$, including parity- and time-reversal asymmetries. We analyse the correlations between different cLFV observables, showing that sizeable asymmetries can arise over experimentally accessible regions of parameter space. The resulting patterns of angular observables provide powerful probes of this class of Standard Model extensions and, in the event of a cLFV signal, could offer a means to test or potentially falsify the underlying framework.
Comments5 pages, 4 figures. This contribution was presented at CLFV2026
