Table of Contents
Atoms, Volume 7, Issue 1 (March 2019) – 38 articles
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Cover Story (view full-size image) The anomalous magnetic moment of the electron, ae, occupies a unique position among high-precision [...] Read more. The anomalous magnetic moment of the electron, ae, occupies a unique position among high-precision studies of physical quantities, in the sense that the precise measurement by a Penning trap is directly compared with the theoretical evaluation based on the renormalized quantum electrodynamics (QED) to high orders of perturbation expansion in the fine structure constant, α. At present, the contributions up to the a 4 term have been firmly established by numerical and analytic methods, and the a 5 contribution has been obtained through extensive numerical study. Together with the new value of a from atom interferometry measurements, uncertainty in experimental and theoretical values has been reduced to the level of 0.2 ppb. In this article, the standard model contributions to ae are summarized and the numerical calculation method of high-order QED terms is described with concrete examples. View this paper