Almost relevant corrections for direct measurements of electron's g-factor

TL;DR

This paper analyzes the corrections to the electron's g-factor measurements by considering sub-leading effects, revealing significant impacts on Landau levels and discussing implications for magnetic moment measurements.

Contribution

It introduces a detailed analysis of sub-leading effects and virtual processes affecting the direct measurement of the electron's g-factor, highlighting previously overlooked corrections.

Findings

Substantial corrections to Landau levels due to background fields.

Implications for the discrepancy between direct and indirect g-factor measurements.

Discussion of effects from Standard Model virtual processes.

Abstract

We revisit the observable used for the direct measurements of the electron's $g$ factor. This is done by considering the sub-leading effects of the large magnetic background field and virtual Standard Model processes. We find substantial corrections to the Landau levels of the electron. Implications for the observed magnetic moment and the tension between direct and indirect measurement are discussed.