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Berlin 2014 – scientific programme

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A: Fachverband Atomphysik

A 2: Precision spectroscopy of atoms and ions I (with Q)

A 2.3: Talk

Monday, March 17, 2014, 11:00–11:15, BEBEL E42

Theoretical calculations for the determination of the electron mass via measurement of the g-factor of 12C5+ — •Jacek Zatorski1, Zoltán Harman1,2, and Christoph H. Keitel11Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2ExtreMe Matter Institute EMMI, Planckstraße 1, 64291 Darmstadt, Germany

We present theoretical results of a recent determination of the electron mass (Ref. [1]) via measurement of the bound electron g-factor in 12C5+. The electron mass was determined with a relative uncertainty approximately 13 times lower than the established CODATA value (Ref. [2]) by means of comparison of theoretical prediction for g(12C5+) and the experimental value. In order to reduce an error bar on the theory’s side, we, first of all, estimated the unknown two-loop higher-order correction to g(12C5+), which is the main source of the uncertainty, by extracting this effect from experimental results for g(28Si13+). In addition, we have improved on the accuracy of certain other physical terms contributing to the g-factor.

[1] S. Sturm, F. Köhler, J. Zatorski, A. Wagner, Z. Harman, G. Werth, W. Quint, C. H. Keitel, and K. Blaum, manuscript submitted.

[2] P. J. Mohr, B. N. Taylor and D. B. Newell, Rev. Mod. Phys. 84, 1527 (2012).

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