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

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 $-1- 1.1(2.1)\cdot 10^{-9}$

Experimental investigations of the influence of a tapered fibre on the stability of the intermode frequency of highly stable femtosecond pulses

NRC publication: Ye

Pulsed laser spectroscopy in muonium and deuterium

The 1s-2s energy interval in the muonium (μ+e-) atom has been measured by Doppler-free two-photon laser spectroscopy. A value of 2 455 528 941.0(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 296.768 38(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