Precision Measurement of the Magnetic Moment of the Muon

Abstract
The ratio of muon to proton magnetic moment μμμp has been measured to high precision in three chemical environments. The agreement shows that the "Ruderman correction" is not applicable. The result is μμμp=3.183347(9) (2.8 ppm); in terms of the muon mass, this implies mμme=206.7683(6).