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arXiv 2606.09166hep-ph
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B-L超对称标准模型中的缪子和陶子电偶极矩

The Muon and Tau Electric Dipole Moments in the B-L Supersymmetric Standard Model

Hebei University(河北大学);Department of Physics, Hebei University(河北大学物理系);Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province(河北省量子场论高精度计算与应用重点实验室);Research Center for Computational Physics of Hebei Province(河北省计算物理研究中心);Radiation Monitoring Technical Center of Ministry of Ecology and Environment(生态环境部辐射监测技术中心);Key Laboratory of Radiation Environmental Monitoring, Ministry of Ecology and Environment(生态环境部辐射环境监测重点实验室)

Wen-Hui Zhang, Jin-Lei Yang, Zhao-Feng Ge, Yu-Li Yan, Yin-Jie Zhang

AI总结:

研究B-L超对称标准模型中CP破坏效应对缪子和陶子电偶极矩的贡献,发现传统μ项主导贡献,B-LSSM特定CPV参数也有显著影响,预测d_μ在实验灵敏度内,|d_τ|可达约10^{-21}e·cm。

摘要:

最近提出的实验预计将显著提高缪子($d_μ$)和陶子($d_τ$)电偶极矩(EDMs)的测量灵敏度。鉴于$d_μ$和$d_τ$的理论预测通常超过电子EDM,本文重点研究B-L超对称(SUSY)标准模型(B-LSSM)中CP破坏(CPV)效应对$d_μ$和$d_τ$的贡献。在考虑一些双圈图修正后,以一般形式解析给出了B-LSSM中对带电轻子EDM的贡献。数值结果表明,大多数SUSY模型中的传统μ项对$d_μ$和$d_τ$起主导贡献,而B-LSSM特有的CPV参数也产生显著影响。研究发现,在B-LSSM参数空间的大部分区域,$d_μ$完全落在拟议实验第二阶段预计的灵敏度范围内,而$|d_τ|$可达约$10^{-21}e\cdot\text{cm}$。

英文摘要:

Recently proposed experiments are expected to significantly improve the measurement sensitivities of the electric dipole moments (EDMs) of muon ($d_μ$) and tau ($d_τ$). Given that theoretical predictions for $d_μ$ and $d_τ$ typically surpass those for the electron EDM, this work focuses on studying the contributions from the CP-violating (CPV) effects in the B-L supersymmetric (SUSY) standard model (B-LSSM) to $d_μ$ and $d_τ$. After considering the corrections from some two-loop diagrams, the contributions in the B-LSSM to the EDMs of charged leptons are presented analytically in general forms. The numerical results show that the traditional $μ$-term in most SUSY models makes dominant contributions to $d_μ$ and $d_τ$, while the B-LSSM specific CPV parameters also induce significant effects. It is found that across a substantial region of the B-LSSM parameter space, $d_μ$ falls well within the projected sensitivity at Phase II of the proposed experiment, and $|d_τ|$ can reach about $10^{-21}e\cdot\text{cm}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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