STI Publications - View Publication Form #18087
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Publication Information
| Title | One-loop fermion-photon vertex in arbitrary gauge and dimensions: a novel approach | ||||
| Abstract | We compute one-loop electron-photon vertex with fully off-shell external momenta in an arbitrary covariant gauge and space-time dimension. There exist numerous efforts in literature where one-loop off-shell vertex is calculated by employing the standard first order Feynman rules in different covariant gauges and space-time dimensions of interest. The tensor structure which decomposes this three-point vertex into the components transverse and longitudinal to the photon momentum gets intertwined in this first order formalism. The Ward-Takahashi identity is explicitly invoked to untangle the two pieces and the results are expressed in a preferred basis of twelve spin-amplitudes. We propose a novel approach based upon an efficient combination of the first and second order formalisms of quantum electrodynamics to compute this one-loop vertex. Among some conspicuous advantages is the fact that this less known second order formalism separates the spin and scalar degrees of freedom of an elect | ||||
| Author(s) | Victor Miguel Banda Guzmán, Adnan Bashir | ||||
| Publication Date | April 2023 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP), Fulbright-García Robles scholarship, CIC - University of Michoacan | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | Yes | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review D |
| Refereed | Yes |
| Volume | |
| Issue | |
| Page(s) | 073008 |
Attachments/Datasets/DOI Link
| Document(s) |
QED-Vertex-Lanl.pdf
(STI Document)
PhysRevD.107.073008.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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