Determination of the antiproton-to-electron mass ratio by precision laser spectroscopy of pHe+.
Phys Rev Lett
; 96(24): 243401, 2006 Jun 23.
Article
em En
| MEDLINE
| ID: mdl-16907239
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)x10(-9). One of these is between two states having microsecond-scale lifetimes hitherto unaccessible to our precision laser spectroscopy method. Comparisons with three-body QED calculations yielded an antiproton-to-electron mass ratio of Mp/me=1836.152674(5).
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2006
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Article