Measurement of the 1s-2s energy interval in muonium

Abstract

The 1s-2s interval has been measured in the muonium ({${\mu }^{+}{e}^{-}$}) atom by Doppler-free two-photon laser spectroscopy. The frequency separation of the states was determined to be 2 455 528 941.0(9.8) MHz in good agreement with quantum electrodynamics. The muon-electron mass ratio can be extracted and is found to be 206.768 38(17). The result may be interpreted as measurement of the muon-electron charge ratio as $-1-1.1(2.1)\cdot 10^{-9}$.

12 Pages, 4 figures

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• New Bounds from Searching for Muonium to Antimuonium Conversion
• The Lamb Shift of Excited S-Levels in Hydrogen and Deuterium Atoms
• Calculation of the light-shifts in the ns-states of hydrogenic systems
• Resonant 3--photon ionization of hydrogenic atoms by non-monochromatic laser field

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