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Diagrammatic Cancellations and the Gauge Dependence of QED

Jul 19, 2016

4 pages

Published in:

Phys.Lett.B 764 (2017) 318-321

Published: Jan 10, 2017

e-Print:

1607.05729 [hep-th]

DOI:

10.1016/j.physletb.2016.11.052

Report number:

LTH-1091

View in:

ADS Abstract Service

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Abstract: (Elsevier)

This letter examines diagrammatic cancellations for Quantum Electrodynamics (QED) in the general linear gauge. These cancellations combine Feynman graphs of various topologies and provide a method to reconstruct the gauge dependence of the electron propagator from the result of a particular gauge by means of a linear Dyson–Schwinger equation. We use this method in combination with dimensional regularization to demonstrate how the 3-loop ε -expansion in the Feynman gauge determines the ε -expansions for all gauge parameter dependent terms to 4 loops.

Cancellation
Dyson–Schwinger equation
Feynman graph
Gauge dependence
Quantum electrodynamics
Renormalization
quantum electrodynamics
gauge: linear
Feynman graph
Dyson-Schwinger equation

References(29)

Figures(0)

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