Electronic Resource
Springer
Foundations of physics
30 (2000), S. 371-381
ISSN:
1572-9516
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract I describe a gauge-independent approach to the relativistic two-body bound state and scattering problems in quantum field theory. The basic tool is an ordinary three-dimensional equation involving a potential operator V which gets contributions from both irreducible and reducible diagrams. In QED the resultant V is independent of the choice of covariant gauge used for the photon propagator, unlike the kernel in the Bethe–Salpeter equation. As an illustration, a problem concerning spin-independent level shifts in two-body bound states is analyzed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1003665605369
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