Conveners
Session 6: Magnetic moment, g factor
- Wolfgang Peter Quint (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Quantum electrodynamic (QED) effects in strong Coulomb fields have been scrutinized recently in high-precision Penning trap $g$ factor experiments. The uncertainty of the atomic mass of the electron has been largely decreased via ...
Antonia Schneider a,b, Klaus Blaum a, Andreas Mooser a, Alexander Rischka a, Stefan Ulmer c, Jochen Walz d,e
a Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany
b University of Heidelberg, Heidelberg, Germany
c RIKEN, Ulmer Fundamental Symmetries Laboratory, Wako, Japan
d Institute for Physics, Johannes-Gutenberg University Mainz, Mainz, Germany
e Helmholtz-Institute Mainz, Mainz,...
The ALPHATRAP experiment [1] at the Max-Planck-Institut für Kernphysik is a cryogenic Penning-trap setup to perform high-precision $g$-factor measurements on highly charged ions (HCI) up to hydrogenlike $^{208}\textrm{Pb}^{81+}$, to test bound-state quantum electrodynamics (BS-QED) [2]. In the vicinity of the nucleus, the electrons bound in HCI experience the strongest electric and magnetic...
Experiments on few-electron ions of heavy atoms are of great importance to test bound-state QED. In particular, the most accurate value of the electron mass (almost by two orders of magnitude more precise than the value from the independent measurements) has been obtained in the study of g factor of highly charged ion. An independent determination of the fine-structure constant α is expected...
After reviewing the theoretical status and the sources of uncertainties of the muon anomalous magnetic moment, I will present the idea of the experiment proposal MUonE aimed at a new determination of the Hadronic Leading Order contribution to the muon g-2. In particular the theoretical challenges related to the proposal will be discussed.
We discuss precise measurements of exclusive and inclusive cross sections performed at various e+e- colliders in the BaBar, BESIII, CMD-3, KEDR, KLOE and SND experiments. Results of these measurements are used for the calculation of hadronic vacuum polarization - an important ingredient of the theoretical prediction for the muon $g-2$ and running fine structure constant in the Standard Model.
