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arXiv 2607.18669hep-ph

通过原子电子上的共振正μ子湮灭产生轻子味违反标量

Production of lepton-flavor-violating scalars through resonant positive-muon annihilation on atomic electrons

  • School of Physics, Peking University(北京大学物理学院)
  • Advanced Energy Science and Technology Guangdong Laboratory(广东省实验室(前沿科技))
  • Institute of Modern Physics, CAS(中国科学院近代物理研究所)
  • School of Nuclear Science and Technology, University of Chinese Academy of Sciences(中国科学院大学核科学与技术学院)

机构由 AI 辅助整理,请以论文原文为准。

Jinhong Shen, Youpeng Wu, Zijian Wang, Leyun Gao, Qite Li, Chen Zhou, Qiang Li, Yu Xu, Xueheng Zhang, Liangwen Chen, He Zhao, Zhiyu Sun, Ruihu Zhu

AI总结:

研究通过μ⁺e⁻→ϕ共振产生轻子味违反标量ϕ,采用相对论束缚态电子波函数计算截面,揭示共振线形的材料依赖性展宽。对HIAF实验,少于一天数据采集就能在90%置信水平探测到10⁻⁵量级耦合,是轻子味违反的有力补充探测手段。

AI中文摘要:

我们研究了具有独特电子 - μ子耦合的不可见轻子味违反标量ϕ,并在固定靶实验中通过μ⁺e⁻→ϕ研究其共振产生。由于有效质心能量由初始态束缚电子的动量决定,原子效应会显著影响共振行为。因此我们采用相对论束缚态电子波函数计算产生截面,并揭示共振线形的材料依赖性展宽。对于提议的HIAF实验,少于一天的数据采集(6×10¹⁰ MOT)就能在共振附近90%置信水平探测到10⁻⁵量级的耦合,表明高强度μ子固定靶实验是轻子味违反的有力补充探测手段。

英文摘要:

We investigate an invisible lepton-flavor-violating scalar $ϕ$ with exclusive $e-μ$ couplings and study its resonant production via $μ^+e^-\toϕ$ in fixed-target experiments. Since the effective center-of-mass energy is determined by the momentum of the initial-state bound electrons, atomic effects can significantly affect the resonance behavior. We therefore employ relativistic bound-state electron wave functions to calculate the production cross section and reveal a material-dependent broadening of the resonance lineshape. For the proposed HIAF experiment, fewer than one day of data taking ($6\times10^{10}$ MOT) can probe couplings at the $10^{-5}$ level at 90\% confidence level near resonance, demonstrating that high-intensity muon fixed-target experiments provide a powerful complementary probe of lepton-flavor violation.

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