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

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dc.contributor.authorAbreu, E. M.C. [UNESP]
dc.contributor.authorDalmazi, D. [UNESP]
dc.contributor.authorDe Souza Dutra, A. [UNESP]
dc.contributor.authorHott, Marcelo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:55:38Z
dc.date.available2022-04-28T19:55:38Z
dc.date.issued2002-01-01
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 in 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 (QED2). 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. © 2002 The American Physical Society.en
dc.description.affiliationUNESP Campus de Guaratinguetá DFQ, Av. Dr. Ariberto Pereira Cunha, 333, CEP 12516-410, Guaratingueta, SP
dc.description.affiliationUnespUNESP Campus de Guaratinguetá DFQ, Av. Dr. Ariberto Pereira Cunha, 333, CEP 12516-410, Guaratingueta, SP
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.65.125030
dc.identifier.citationPhysical Review D, v. 65, n. 12, 2002.
dc.identifier.doi10.1103/PhysRevD.65.125030
dc.identifier.issn0556-2821
dc.identifier.scopus2-s2.0-0037098392
dc.identifier.urihttp://hdl.handle.net/11449/224294
dc.language.isoeng
dc.relation.ispartofPhysical Review D
dc.sourceScopus
dc.titleEffective action for QED with fermion self-interaction in D = 2 and D = 3 dimensionsen
dc.typeArtigo

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