Landau-Khalatnikov-Fradkin transformation for the fermion propagator in QED in arbitrary dimensions

We explore the dependence of fermion propagators on the covariant gauge fixing parameter in quantum electrodynamics (QED) with the number of spacetime dimensions kept explicit. Gauge covariance is controlled by the Landau-Khalatnikov-Fradkin transformation (LKFT). Utilizing its group nature, the LKF...

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Bibliographic Details
Published in:Physical review. D 2017-04, Vol.95 (7), Article 076007
Main Authors: Jia, Shaoyang, Pennington, M. R.
Format: Article
Language:English
Subjects:
Covariance
Dependence
Fractional calculus
Minkowski space
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum electrodynamics
Quantum theory
Transformations
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Summary:We explore the dependence of fermion propagators on the covariant gauge fixing parameter in quantum electrodynamics (QED) with the number of spacetime dimensions kept explicit. Gauge covariance is controlled by the Landau-Khalatnikov-Fradkin transformation (LKFT). Utilizing its group nature, the LKFT for a fermion propagator in Minkowski space is solved exactly. The special scenario of 3D is used to test claims made for general cases. When renormalized correctly, a simplification of the LKFT in 4D has been achieved with the help of fractional calculus.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.95.076007