Author/Authors :
J. Sakaguchi، نويسنده , , J. Eades، نويسنده , , R.S. Hayano، نويسنده , , M. Hori، نويسنده , , D. Horv?th، نويسنده , , T. Ishikawa، نويسنده , , B. Juh?sz، نويسنده , , H.A. Torii، نويسنده , , E. Widmann، نويسنده , , H. Yamaguchi، نويسنده , , T. Yamazaki، نويسنده ,
Abstract :
We have designed and developed a laser-microwave triple resonance spectroscopy experiment of antiprotonic helium to investigate its hyperfine (HF) and superhyperfine (SHF) structures. We succeeded in making microwave transitions between HF substates of the (n,l) = (37, 35) metastable state, and resolved doublet resonance peaks split by SHFS. We determined the resonance frequencies with 30ppm precision. The experimental values agree with recent theoretical calculations, and to ∼ 60ppm level three-body QED theory is verified.
