Dressed perturbation theory: Perturbative approach to Dyson-Schwinger and Bethe-Salpeter equations

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorKrein, Gastão-
Data de aceite: dc.date.accessioned2025-08-21T15:59:24Z-
Data de disponibilização: dc.date.available2025-08-21T15:59:24Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2014-02-12-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/228179-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/228179-
Descrição: dc.descriptionDressed perturbation theory (DPT) is a perturbative approach based on the idea of using dressed propagators, instead of free propagators like in ordinary perturbation theory. Quark and gluon self-energies are added to the free part of the QCD action and subtracted from the interaction part. The added self-energies are determined self-consistently via a devised symmetry-preserving power counting scheme. Correlation functions are then calculated using the modified QCD interaction according to the devised power counting. At zeroth order, DPT is very similar to the rainbow-ladder truncation scheme for Dyson-Schwinger and Bethe-Salpeter equations; the first nontrivial perturbative contribution introduces vertex corrections. Dynamical chiral symmetry breaking is realized in the light-quark sector; Goldstone's theorem and the axial-vector Ward-Takahashi identity are satisfied in the chiral limit. Higher order contributions can be calculated in a systematic, symmetry-preserving and controllable way, like in ordinary perturbation theory.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II-
Descrição: dc.descriptionFAPESP: 2009/50180-0-
Descrição: dc.descriptionFAPESP: 2013/01907-0-
Idioma: dc.languageen-
Relação: dc.relationProceedings of Science-
???dc.source???: dc.sourceScopus-
Título: dc.titleDressed perturbation theory: Perturbative approach to Dyson-Schwinger and Bethe-Salpeter equations-
Tipo de arquivo: dc.typeaula digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.