Eletrodinâmica quântica generalizada a la teoria de perturbação causal

• Ano de defesa: 2015
• Autor(a) principal: Soto, D. E [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Causalidade (Física); Teoria de campos (Física); Matriz s; Causality (Physics)
• Link de acesso: http://hdl.handle.net/11449/132180; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/28-10-2015/000853452.pdf

In this thesis, we will present a perturbative research of the Generalized Quantum Electrodynamics (GQED4) within the approach of the Causal Perturbation Theory (TPC). With this purpose, we first make a review of the basics ofTPC and give a complete enough theory to apply to GQED4. We need the other essential part for this objetive: the Quantum Free Field Theory of the Generalized Electrodynamics, in particular, to obtain the positive and negative frequency propagators, for which, we will introduce their analytic representations, taking as basis the Wightman Formalism. After the classification of the first perturbative terms, we will present the Moeller and Compton scattering and, show the difference with the Quantum Electrodynamicsresults. We will calculate the radiactive corrections at one-loop and, show that the vacuum polarization normalization continues the usual way but, for the electron self-enegy normalization we need to introduce a new criterion in TPC, such that fulfills the mass on-shell condition. Also, we will show the regular behavior of the vertex such as in the electronself-energy. Finally, we will demostrate inductivelly the discrete symmetries, the Ward-Takahashi-Fradkin identities and the normalizability of the GQED4