Extremely precise measurement of the mass of an electron | Max-Planck-Gesellschaft https://www.mpg.de/7961020/electron-mass?c=19168328
A team headed by K. Blaum and Ch. Keitel from the Max Planck Institute for Nuclear Physics has determined with extreme precision the mass of an electron in an experiment in a Penning trap. An accurate electron mass is of significance to physical constants and the standard model of physics.
Helmholtzzentrum für Schwerionenforschung in Darmstadt and the Johannes