Gauge Dependence of Four-Fermion QED Green Function and a Breakdown of Gauge Invariance in Atom-Like Bound State Calculations

Details Gauge Dependence of Four-Fermion QED Green Function and a Breakdown of Gauge Invariance in Atom-Like Bound State Calculations Gauge Dependence of Four-Fermion QED Green Function and a Breakdown of Gauge Invariance in Atom-Like Bound State Calculations

1996-02-29

arxiv.org/abs/hep-ph/9602425v1

Nucl.Phys. B466 (1996) 159-172

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, LaTex, no figures, to appear in Nucl. Phys. B

Scientific paper

10.1016/0550-3213(96)00093-4

We derive a relation between four-fermion QED Green functions of different covariant gauges which defines the gauge dependence completely. We use the derived gauge dependence to check the gauge invariance of atom-like bound state calculations. We find that the existing QED procedure does not provide gauge invariant binding energies. A way to a corrected gauge invariant procedure is pointed out.

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