[paper] Direct Measurement of the Proton Magnetic Moment

Direct Measurement of the Proton Magnetic Moment

J. DiSciacca and G. Gabrielse

doi: 10.1103/PhysRevLett.108.153001

The proton magnetic moment in nuclear magnetons is measured to be μpN≡g/2=2.792 846±0.000 007, a 2.5 parts per million uncertainty. The direct determination, using a single proton in a Penning trap, demonstrates the first method that should work as well with an antiproton (p̅ ) as with a proton (p). This opens the way to measuring the p̅ magnetic moment (whose uncertainty has essentially not been reduced for 20 years) at least 103 times more precisely.

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