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Nonrelativistic QED approach to the bound-electron g factor

K. Pachucki·U. D. Jentschura·V. A. Yerokhin
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Abstract

Within a systematic approach based on nonrelativistic quantum electrodynamics (NRQED), we derive the one-loop self-energy correction of order alpha (Zalpha)^4 to the bound-electron g factor. In combination with numerical data, this analytic result improves theoretical predictions for the self-energy correction for carbon and oxygen by an order of magnitude. Basing on one-loop calculations, we obtain the logarithmic two-loop contribution of order alpha^2 (Zalpha)^4 ln[(Zalpha)^-2] and the dominant part of the corresponding constant term. The results obtained improve the accuracy of the theoretical predictions for the 1S bound-electron g factor and influence the value of the electron mass determined from g factor measurements.

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K. Pachucki, U. D. Jentschura, V. A. Yerokhin. 2004-11-05. Nonrelativistic QED approach to the bound-electron g factor. https://doi.org/10.1103/physrevlett.93.150401

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