| Texto completo | |
| Autor(es): |
Oliveira, Orlando
Número total de Autores: 1
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| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 112, n. 7, p. 23-pg., 2025-10-10. |
| Resumo | |
We investigate the Dyson-Schwinger equation for the photon-fermion one-particle irreducible vertex in QED in linear covariant gauges. The longitudinal component of this vertex is described using the Ball-Chiu basis, while its transverse part is expressed with the K & imath;z & imath;lersu-Reenders-Pennington basis. Combining the vertex Ward-Takahashi identity with the vertex equation, we derive a set of exact, nonlinear integral equations governing the transverse vertex. These equations hold for any linear covariant gauge and must be solved self-consistently. We discuss several approximations to the exact equations, generalizing results previously obtained at the perturbative one-loop level. Various kinematical configurations are also examined. Furthermore, we compute the perturbative solution of the transverse vertex Dyson-Schwinger equations for all transverse form factors and derive their perturbative asymptotic expressions. (AU) | |
| Processo FAPESP: | 22/05328-3 - Vértices não-perturbativos da QED e QCD de primeiros princípios: combinando métodos contínuos com resultados da rede |
| Beneficiário: | Tobias Frederico |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |