Antiproton magnetic moment determined from the HFS of pHe
نویسنده
چکیده
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 μs = −2.7862(83)μN, which agrees with the magnetic moment of the proton within 2.9 × 10−3.
منابع مشابه
Determining the antiproton magnetic moment from measurements of the hyperfine structure of antiprotonic helium
Recent progress in the spectroscopy of antiprotonic helium has allowed for measuring the separation between components of the hyperfine structure (HFS) of the (37, 35) metastable states with an accuracy of 300 MHz, equivalent to a relative accuracy of 3.10. The analysis of the uncertainties of the available theoretical results on the antiprotonic helium HFS shows that the accuracy of the value ...
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تاریخ انتشار 2009