Remeasurement of the magnetic moment of the antiproton

A. Kreissl,A. D. Hancock,H. Koch,Th. Köhler,H. Poth,U. Raich,D. Rohmann,a. Wolf, L. Tauscher,A. Nilsson,M. Suffert,M. Chardalas,S. Dedoussis, H. Daniel,T. von Egidy,F. J. Hartmann,W. Kanert,H. Plendl,G. Schmidt,J. J. Reidy

European Physical Journal C（1988）

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摘要

A high-precision measurement of the finestructure splitting in the circular 11?10 X-ray transition of $\bar p^{208} Pb$ was performed. The experimental value of 1199(5) eV is in agreement with QED calculations. From that value the magnetic moment of the antiproton was deduced to be -2.8005(90)µnucl. With this result the uncertainty of the previous world average value was reduced by a factor of ˜2. A comparison with the corresponding quantity of the proton now yields: ${{\left( {\mu _p - \left| {\left\langle {\mu _{\bar p} } \right\rangle } \right|} \right)} \mathord{\left/ {\vphantom {{\left( {\mu _p - \left| {\left\langle {\mu _{\bar p} } \right\rangle } \right|} \right)} {\mu _p }}} \right. \kern-\nulldelimiterspace} {\mu _p }} = \left( { - 2.4 \pm 2.9} \right) \times 10^{ - 3}$ .

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particle physics,magnetic moment

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