Determination of the antiproton-to-electron mass ratio by precision laser spectroscopy of $\overline{p}He^{+}$
- Hori, M
- Dax, A
- Eades, John
- Gomikawa, K
- Hayano, R S
- Ono, N
- Pirkl, Werner
- Widmann, E
- Torii, H A
- Juhász, B
- Barna, D
- Horváth, D
Publication date
January 2006
DOI Publisher
American Physical Society (APS)Abstract
A femtosecond optical frequency comb and continuous-wave pulse- amplified laser were used to measure 12 transition frequencies of antiprotonic helium to fractional precisions of (9-16) 10/sup -9lifetimes hitherto unaccessible to our precision laser spectroscopy method. Comparisons with three-body QED calculations yielded an antiproton-to-electron mass ratio of M/sub pmacron//m/sub e/=1836.152 674(5)
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