Particle physics

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...

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Bibliographic Details
Published inNuclear physics. B Vol. 466; no. 1; pp. 159 - 170
Main Author Pivovarov, Grigorii B.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.1996
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Summary: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.
ISSN:0550-3213
1873-1562
DOI:10.1016/0550-3213(96)00093-4