Abstract
The 1s–2s energy interval in the muonium (μ+e−) atom has been measured by Doppler free two photon laser spectroscopy. A value of 2455528941.0(9.8) MHz has been obtained in good agreement with quantum electrodynamics (QED). The muon-electron mass ratio can be extracted and is found to be 206.76838(17). The measurement may also be interpreted as a determination of the muon-electron charge ratio as -1- 1.1(2.1)· 10−9. Corresponding measurements in deuterium using the same experimental setup confirmed the validity of the applied analysis procedure.
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Meyer, V., Bagayev, S., Baird, P. et al. Pulsed laser spectroscopy in muonium and deuterium. Hyperfine Interactions 127, 197–200 (2000). https://doi.org/10.1023/A:1012691517257
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DOI: https://doi.org/10.1023/A:1012691517257