Antiproton–to–electron mass ratio determined by two-photon laser spectroscopy of antiprotonic helium atoms
- Sótér A.
- Hori M.
- Barna D.
- Hayano R.
- Dax A.
- Friedreich S.
- Juhász B.
- Pask T.
- Widmann E.
- Horváth D.
- Venturelli L.
- Zurlo N.
Publication date
March 2014
DOI Publisher
EDP Sciences Journal
EPJ Web of ConferencesAbstract
The ASACUSA collaboration of CERN has recently carried out two-photon laser spectroscopy of antiprotonic helium atoms. Three transition frequencies were determined with fractional precisions of 2.3–5 parts in 109. By comparing the results with three-body QED calculations, the antiproton-to-electron mass ratio was determined as 1836.1526736(23)
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