Cortinovis Irene, Ohayon Ben, de Sousa Borges Lucas, Janka Gianluca, Golovizin Artem, Zhadnov Nikita, Crivelli Paolo
Institute for Particle Physics and Astrophysics, ETH, 8093 Zurich, Switzerland.
Paul Scherrer Institute, PSI, 5232 Villigen, Switzerland.
Eur Phys J D At Mol Opt Phys. 2023;77(4):66. doi: 10.1140/epjd/s10053-023-00639-z. Epub 2023 Apr 19.
We present an updated value of the Muonium 1-2 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 1-2 transition frequency at a uncertainty level.
我们给出了μ子1 - 2跃迁频率的更新值，强调了不同量子电动力学修正的贡献以及狄拉克贡献中的巨大不确定性，该不确定性源于电子与μ子质量比的不确定性。改进这条谱线的测量将有助于更精确地确定基本常数，例如电子与μ子质量比，或者结合μ子超精细分裂来确定里德伯常量的独立值。此外，我们报告了μ - MASS实验的当前状态，该实验旨在以一定的不确定度水平测量μ子1 - 2跃迁频率。
