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

(2)U.Oxford; (3)RAL; (4)U.Sussex; (5)I.LaserPhys.Novosibirsk; (6)Yale U); A. Breitrueck (1); A. Grossmann (1); C.A.Scott (3); D.Huebl (1); D.Lucas (2)

arxiv: hep-ex/9907013 · v1 · pith:QYCLBUL6new · submitted 1999-07-12 · ✦ hep-ex

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

V.Meyer (1) , S.N.Bagayev (5) , P.E.G.Baird (2) , P.Bakule (2) , M.G.Boshier (4) , A. Breitrueck (1) , S.L.Cornish (2) , S. Dychkov (5)

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G.H.Eaton (3) A. Grossmann (1) D.Huebl (1) V.W.Hughes (6) K.Jungmann (1) I.C.Lane (2) Y.W.Liu (2) D.Lucas (2) Y.Matyugin (5) J.Merkel (1) G. zu Putlitz (1) I.Reinhard (1) P.G.H.Sandars (2) R.Santra (1) P.Schmidt (1) C.A.Scott (3) W.T.Toner (2) M.Towrie (3) K.Traeger (1) L.Willmann (1) V.Yakhontov (1) ((1)U.Heidelberg (2)U.Oxford (3)RAL (4)U.Sussex (5)I.LaserPhys.Novosibirsk (6)Yale U)

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keywords intervalmeasurementmuon-electronmuoniumratios-2sagreementatom

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

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