Abstract
The ASACUSA collaboration of CERN has carried out several laser spectroscopy experiments of antiprotonic helium atoms. By comparing the results with three-body QED calculations, the antiproton-to-electron mass ratio was determined as \(M_{\overline{p}}/m_e=1836.152674(5)\). We are now developing some laser systems and detectors to further improve the experimental precision.
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Hori, M. Precise laser spectroscopy of antiprotonic helium at CERN’s Antiproton Decelerator. Hyperfine Interact 196, 243–251 (2010). https://doi.org/10.1007/s10751-009-0154-y
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DOI: https://doi.org/10.1007/s10751-009-0154-y