Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 19: Electrons, incl. Scattering and Recombination
A 19.9: Vortrag
Freitag, 6. April 2001, 17:45–18:00, H1028
Theory for the g factor of the electron in hydrogenlike carbon and a new value for the electron mass — •Thomas Beier1, Savely G. Karshenboim2, Hartmut Häffner1,3, Nikolaus Hermanspahn3, H.-Jürgen Kluge1, Gerrit Marx1, Wolfgang Quint1, Tristan Valenzuela3, José Verdú3, and Günther Werth3 — 1GSI, 64291 Darmstadt, Germany — 2D.I.Mendeleev Institute for Metrology, St. Petersburg, 198005, Russia — 3Institut für Physik, Universität Mainz, 55099 Mainz, Germany
The g factor of an electron bound in hydrogenlike carbon
was measured to be 2.001 041 596 4 (8)(6)(44) where the uncertainties
are due to statistical and systematical errors and the current value of
the electron mass [1]. This value is in agreement with theoretical values
of nearly the same precision [2,3] which in turn allows the determination
of an independent value for the electron mass from this most precise
comparison of quantum electrodynamical theory and experiment in
any multiply charged system. We will elucidate the theoretical
contributions which form the basis of this new mass determination.
[1] H. Häffner et al., PRL 85 (2000) 5308.
[2] S. G. Karshenboim, Phys. Lett. A 266 (2000) 380.
[3] T. Beier et al., Phys. Rev. 62 (2000) 032510.