Estimate of the Sixth-Order Contribution to the Anomalous Magnetic Moment of the Electron
- 25 April 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 168 (5), 1562-1567
- https://doi.org/10.1103/PhysRev.168.1562
Abstract
An improvement of the estimate by Drell and Pagels of the anomalous magnetic moment of the electron is given. Use is made of a sidewise dispersion relation in which the mass of one of the external electron lines is analytically continued off its mass shell. Only one-electron, one-photon states are retained in the absorptive amplitude, but this is sufficient to obtain all terms in the absorptive part of the anomalous moment proportional to () and as . This calculation relates to the Compton amplitude in its exact threshold region. An expansion is made in powers of the photon energy in the Compton amplitude rather than a perturbation calculation in powers of . The Schwinger term is reproduced exactly. A cutoff is chosen so that the fourth-order term is approximately reproduced. This cutoff leads to an estimate of the sixth-order term of .
Keywords
This publication has 13 references indexed in Scilit:
- Anomalous Magnetic Moment of the Electron, Muon, and NucleonPhysical Review B, 1965
- Singularities and Discontinuities of Feynman AmplitudesJournal of Mathematical Physics, 1960
- Electromagnetic Form Factors of the NucleonPhysical Review B, 1960
- Electromagnetic Structure of the NucleonPhysical Review B, 1960
- Analytic Properties of Transition Amplitudes in Perturbation TheoryPhysical Review B, 1959
- The magnetic moment of the electronAnnals of Physics, 1958
- Magnetic Dipole Moment of the ElectronPhysical Review B, 1957
- Scattering of Low-Energy Photons by Particles of Spin ½Physical Review B, 1954
- Scattering of Light of Very Low Frequency by Systems of Spin ½Physical Review B, 1954
- On Quantum-Electrodynamics and the Magnetic Moment of the ElectronPhysical Review B, 1948