Effective action for QED with fermion self-interaction in D=2 and D=3 dimensions

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dc.contributor.authorAbreu, EMC
dc.contributor.authorDalmazi, D.
dc.contributor.authorDutra, Alvaro de Souza [UNESP]
dc.contributor.authorHott, M.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:27:33Z
dc.date.available2014-05-20T13:27:33Z
dc.date.issued2002-06-15
dc.description.abstractIn this work we discuss the effect of the quartic fermion self-interaction of Thirring type in QED in D=2 and D=3 dimensions. This is done through the computation of the effective action up to quadratic terms in the photon field. We analyze the corresponding nonlocal photon propagators nonperturbatively in k/m, where k is the photon momentum and m the fermion mass. The poles of the propagators were determined numerically by using the MATHEMATICA software. In D=2 there is always a massless pole whereas for strong enough Thirring coupling a massive pole may appear. For D=3 there are three regions in parameter space. We may have one or two massive poles or even no pole at all. The interquark static potential is computed analytically in D=2. We notice that the Thirring interaction contributes with a screening term to the confining linear potential of massive two-dimensional QED (QED(2)). In D=3 the static potential must be calculated numerically. The screening nature of the massive QED(3) prevails at any distance, indicating that this is a universal feature of D=3 electromagnetic interaction. Our results become exact for an infinite number of fermion flavors.en
dc.description.affiliationUNESP, DFQ, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUnespUNESP, DFQ, BR-12516410 Guaratingueta, SP, Brazil
dc.format.extent5
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.65.125030
dc.identifier.citationPhysical Review D. College Pk: American Physical Soc, v. 65, n. 12, 5 p., 2002.
dc.identifier.doi10.1103/PhysRevD.65.125030
dc.identifier.fileWOS000176771700089.pdf
dc.identifier.issn0556-2821
dc.identifier.lattes8279393876415608
dc.identifier.lattes6314084638411003
dc.identifier.urihttp://hdl.handle.net/11449/9095
dc.identifier.wosWOS:000176771700089
dc.language.isoeng
dc.publisherAmerican Physical Soc
dc.relation.ispartofPhysical Review D
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffective action for QED with fermion self-interaction in D=2 and D=3 dimensionsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmerican Physical Soc
unesp.author.lattes8279393876415608
unesp.author.lattes6314084638411003[3]
unesp.author.orcid0000-0003-3027-1066[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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Artigos - Física e Química - FEG