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<p>The spontaneous conversion of muonium to antimuonium is an interesting charged lepton flavor violation phenomenon that offers a sensitive probe for potential new physics and serves as a tool to constrain the parameter space beyond the Standard Model. The Muonium-to-Antimuonium Conversion Experiment (MACE) was designed to utilize a high-intensity muon beam, a Michel electron magnetic spectrometer, a positron transport system, and a positron detection system to either discover or constrain this rare process with a conversion probability of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mathcal {O}(10^{-13})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi mathvariant="script">O</mi> <mo stretchy="false">(</mo> <msup> <mn>10</mn> <mrow> <mo>-</mo> <mn>13</mn> </mrow> </msup> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>. This article presents an overview of the theoretical framework and a detailed description of the experimental design for muonium-to-antimuonium conversion.</p>

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Conceptual design of the muonium-to-antimuonium conversion experiment (MACE)

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • Ai-Yu Bai,
  • Han-Jie Cai,
  • Chang-Lin Chen,
  • Si-Yuan Chen,
  • Xu-Rong Chen,
  • Yu Chen,
  • Wei-Bin Cheng,
  • Ling-Yun Dai,
  • Rui-Rui Fan,
  • Li Gong,
  • Zi-Hao Guo,
  • Yuan He,
  • Zhi-Long Hou,
  • Yin-Yuan Huang,
  • Huan Jia,
  • Hao Jiang,
  • Han-Tao Jing,
  • Xiao-Shen Kang,
  • Hai-Bo Li,
  • Jin-Cheng Li,
  • Yang Li,
  • Da-Ming Liu,
  • Shu-Lin Liu,
  • Gui-Hao Lu,
  • Han Miao,
  • Yun-Song Ning,
  • Jian-Wei Niu,
  • Hua-Xing Peng,
  • Alexey A. Petrov,
  • Yuan-Shuai Qin,
  • Ming-Chen Sun,
  • Jian Tang,
  • Jing-Yu Tang,
  • Ye Tian,
  • Rong Wang,
  • Xiao-Dong Wang,
  • Yi Wang,
  • Zhi-Chao Wang,
  • Chen Wu,
  • Tian-Yu Xing,
  • Wei-Zhi Xiong,
  • Yu Xu,
  • Bao-Jun Yan,
  • De-Liang Yao,
  • Tao Yu,
  • Ye Yuan,
  • Yi Yuan,
  • Yao Zhang,
  • Yongchao Zhang,
  • Zhi-Lv Zhang,
  • Guang Zhao,
  • Shi-Han Zhao

摘要

The spontaneous conversion of muonium to antimuonium is an interesting charged lepton flavor violation phenomenon that offers a sensitive probe for potential new physics and serves as a tool to constrain the parameter space beyond the Standard Model. The Muonium-to-Antimuonium Conversion Experiment (MACE) was designed to utilize a high-intensity muon beam, a Michel electron magnetic spectrometer, a positron transport system, and a positron detection system to either discover or constrain this rare process with a conversion probability of \(\mathcal {O}(10^{-13})\) O ( 10 - 13 ) . This article presents an overview of the theoretical framework and a detailed description of the experimental design for muonium-to-antimuonium conversion.