We report a determination of the antiproton magnetic moment, measured in a three-body system, independent of previous experiments. We present results from a systematic study of the hyperfine (HF) structure of antiprotonic helium where we have achieved a precision more than a factor of 10 better than our first measurement. A comparison between the experimental results and three-body quantum electrodynamic (QED) calculations leads to a new value for the antiproton magnetic moment μsover(p, ̄) = - 2.7862 (83) μN, which agrees with the magnetic moment of the proton within 2.9 × 10- 3.
|Number of pages||5|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - júl. 6 2009|
ASJC Scopus subject areas
- Nuclear and High Energy Physics