Dressed perturbation theory for the quark propagator: Fernando Enrique Serna Algarín. -

Página do item simplificado
dc.contributor.advisorKrein, Gastão Inácio [UNESP]
dc.contributor.authorAlgarín, F.E.S [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-06-17T19:34:08Z
dc.date.available2015-06-17T19:34:08Z
dc.date.issued2013-06-11
dc.description.abstractThe rainbow-ladder approximation is a simple nonperturbative truncation scheme for nonperturbative calculations in Quantum Chromodynamics (QCD). It provides satisfactory results for the ground-states of light pseudoscalar and vector mesons, but for excited and exotic states, as well as for heavy-light mesons, this truncation provides less accurate results. In the present dissertation we have proposed a novel approach to go beyond the rainbow-ladder truncation, which we name dressed perturbation theory. The guiding principle of the approach is to modify the quadratic part of the QCD action by the addition of self-energy terms for the quarks and gluons, and perform perturbative calculations with the interaction action subtracted by the same self-energies. Instead of noninteracting propagators of traditional perturbative QCD calculations, the novel perturbative scheme is performed with dressed propagators. The self-energies used in the dressed propagators can be taken from the ladder approximation, or from lattice QCD simulations. Our main concern in the dissertation is the application of the formalism to the the quark propagator. The lowest nontrivial order corrections are two-loop vertex corrections. Numerical results are obtained for quark mass function and pion properties in the chiral limit for a simple ansatz for the gluon self-energyen
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extentx, 106 f. : il.
dc.identifier.aleph000809991
dc.identifier.capes33015015001P7
dc.identifier.citationALGARÍN, F.E.S. Dressed perturbation theory for the quark propagator: Fernando Enrique Serna Algarín. -. 2013. x, 106 f. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Física Teórica, 2013.
dc.identifier.filehttp://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/22-05-2015/000809991.pdf
dc.identifier.lattes5704289678296630
dc.identifier.urihttp://hdl.handle.net/11449/123856
dc.language.isoeng
dc.publisherUniversidade Estadual Paulista (Unesp)
dc.rights.accessRightsAcesso aberto
dc.sourceAleph
dc.subjectCromodinâmica quânticapt
dc.subjectPartículas (Física nuclear) - Quiralidadept
dc.subjectSimetria quebrada (Fisica)pt
dc.subjectGluonspt
dc.subjectQuarkspt
dc.subjectQuantum chromodynamicspt
dc.titleDressed perturbation theory for the quark propagator: Fernando Enrique Serna Algarín. -en
dc.typeDissertação de mestrado
unesp.author.lattes5704289678296630
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt
unesp.graduateProgramFísica - IFTpt
unesp.knowledgeAreaFísica teóricapt
unesp.researchAreaFísica nuclearpt

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
000809991.pdf
Tamanho:
648.28 KB
Formato:
Adobe Portable Document Format
Baixar

Coleções

Dissertações - Física - IFT