Measurement of the 1s-2s energy interval in muonium
/ Authors
V.Meyer, S.N.Bagayev, P.E.G.Baird, P.Bakule, M.G.Boshier, A. Breitrueck, S.L.Cornish, S. Dychkov, G.H.Eaton, A. Grossmann
and 24 more authors
D.Huebl, V.W.Hughes, K.Jungmann, I.C.Lane, Y.W.Liu, D.Lucas, Y.Matyugin, J.Merkel, G. Putlitz, I.Reinhard, P.G.H.Sandars, R.Santra, P.Schmidt, C.A.Scott, W.T.Toner, M.Towrie, K.Traeger, L.Willmann, V.Yakhontov U.Heidelberg, U.Oxford, Ral, U.Sussex, I.LaserPhys.Novosibirsk, U. Yale
/ Abstract
The 1s-2s interval has been measured in the muonium (&mgr;(+)e(-)) atom by Doppler-free two-photon pulsed 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 result may be interpreted as a measurement of the muon-electron charge ratio as -1-1.1(2.1)x10(-9). We expect significantly higher accuracy at future high flux muon sources and from cw laser technology.
Journal: Physical review letters