Logarithmically enhanced Euler-Heisenberg Lagrangian contribution to the electron gyromagnetic factor
Aug 17, 20205 pages
Published in:
- Phys.Rev.A 102 (2020) 5, 050801
- Published: Nov 11, 2020
e-Print:
- 2008.07550 [hep-ph]
Report number:
- Alberta Thy 2-20,
- SI-HEP-2020-21,
- P3H-20-042,
- CERN-TH-2020-137
Citations per year
Abstract: (APS)
Contrary to what was previously believed, two-loop radiative corrections to the g factor of an electron bound in a hydrogenlike ion at O(α2(Zα)5) exhibit logarithmic enhancement. This previously unknown contribution is due to a long-distance light-by-light scattering amplitude. Taking an effective field theory approach, and using the Euler-Heisenberg Lagrangian, we find Δg=−απ2Zα556π135lnZα.Note:
- 5 pages, 3 figures
- Atomic and molecular structure and dynamics; high-precision experiments
- photon photon: scattering
- electron
- effective field theory
- radiative correction
- scattering amplitude
- enhancement
- ion
References(0)
Figures(4)
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