Muonium 1S-2S跃迁频率的更新
Update of Muonium 1S-2S transition frequency
AI总结：
本文更新了Muonium 1S-2S跃迁频率，指出QED修正和电子-μ子质量比不确定性是关键，改进测量可提升基本常数精度，并报告了Mu-MASS实验以10 kHz精度测量的进展。
摘要：
我们给出了Muonium 1S-2S跃迁频率的更新值，重点强调了不同QED修正的贡献，以及由电子-μ子质量比的不确定性导致的狄拉克贡献中的大不确定性。改进这条谱线的测量将能够提取更精确的基本常数，例如电子-μ子质量比，或者与Muonium超精细分裂结合，得到里德伯常数的独立值。此外，我们报告了Mu-MASS实验的当前状态，该实验旨在以10 kHz的不确定度水平测量Muonium 1S-2S跃迁频率。
英文摘要：
We present an updated value of the Muonium 1S-2S transition frequency, highlighting contributions from different QED corrections as well as the large uncertainty in the Dirac contribution, stemming from the uncertainty of the electron-to-muon mass ratio. Improving the measurement of this spectral line would allow to extract a more accurate determination of fundamental constants, such as the electron-to-muon mass ratio or, combined with the Muonium hyperfine splitting, an independent value of the Rydberg constant. Furthermore we report on the current status of the Mu-MASS experiment, which aims at measuring the Muonium 1S-2S transition frequency at a 10 kHz uncertainty level.
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