A 13-fold improved value for the electron mass

Recently the g-factor experiment for highly charged ions located in Mainz has provided the most stringent bound-state quantum electrodynamics (BS-QED) test. Here, the bound electron g-factor of 28Si13+ has been determined by the Larmor-to-cyclotron frequency ratio and the ion-to-electron mass ratio. For hydrogenlike ions with small nuclear charge, e.g. Z=6, the g-factor can be calculated with parts-per-trillion precision. Experimental improvements enabled the measurement of the Larmor-to-cyclotron frequency ratio with a relative precision of 3∙10-11 for 12C5+: In combination with theoretical predictions, the atomic mass of the electron has been improved by a factor of 13 with respect to the current CODATA value. This result will directly contribute to ultra-high precision tests of the Standard Model, e.g. the determination of the fine structure constant and future BS-QED tests. In this talk the measurement of the electron mass will be presented and the current status on BS-QED tests will be summarized.