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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/68075
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dc.contributor.authorSuzuki, A. T.-
dc.contributor.authorSales, J. H O-
dc.date.accessioned2014-05-27T11:21:15Z-
dc.date.accessioned2016-10-25T18:20:20Z-
dc.date.available2014-05-27T11:21:15Z-
dc.date.available2016-10-25T18:20:20Z-
dc.date.issued2004-12-14-
dc.identifierhttp://dx.doi.org/10.1142/S021773230401566X-
dc.identifier.citationModern Physics Letters A, v. 19, n. 38, p. 2831-2844, 2004.-
dc.identifier.issn0217-7323-
dc.identifier.urihttp://hdl.handle.net/11449/68075-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/68075-
dc.description.abstractGauge fields in the light front are traditionally addressed via, the employment of an algebraic condition n·A = 0 in the Lagrangian density, where Aμ is the gauge field (Abelian or non-Abelian) and nμ is the external, light-like, constant vector which defines the gauge proper. However, this condition though necessary is not sufficient to fix the gauge completely; there still remains a residual gauge freedom that must be addressed appropriately. To do this, we need to define the condition (n·A) (∂·A) = 0 with n·A = 0 = ∂·A. The implementation of this condition in the theory gives rise to a gauge boson propagator (in momentum space) leading to conspicuous nonlocal singularities of the type (k·n)-α where α = 1, 2. These singularities must be conveniently treated, and by convenient we mean not only mathemathically well-defined but physically sound and meaningful as well. In calculating such a propagator for one and two noncovariant gauge bosons those singularities demand from the outset the use of a prescription such as the Mandelstam-Leibbrandt (ML) one. We show that the implementation of the ML prescription does not remove certain pathologies associated with zero modes. However we present a causal, singularity-softening prescription and show how to keep causality from being broken without the zero mode nuisance and letting only the propagation of physical degrees of freedom.en
dc.format.extent2831-2844-
dc.language.isoeng-
dc.sourceScopus-
dc.subjectLight fronten
dc.subjectQuantum gauge bosonsen
dc.subjectSingularities in Feynman propagatorsen
dc.subjectbosonen
dc.subjectcalculationen
dc.subjectdensityen
dc.subjectelectric fielden
dc.subjecthardnessen
dc.subjectlighten
dc.subjectmathematicsen
dc.subjectquantum chemistryen
dc.subjectsounden
dc.subjectspaceen
dc.subjecttheoryen
dc.titleQuantum gauge boson propagators in the light fronten
dc.typeoutro-
dc.contributor.institutionNorth Carolina State University-
dc.contributor.institutionUniv. Federal de Itajubá-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationDepartment of Physics North Carolina State University, Raleigh, NC 27695-8202-
dc.description.affiliationInstituto de Ciências Univ. Federal de Itajubá, CEP 37500-000, Itajubá, MG-
dc.description.affiliationInstituto de Física Teórica-UNESP, Rua, Pamplona 145, 01405-900, São Paulo, SP-
dc.description.affiliationUnespInstituto de Física Teórica-UNESP, Rua, Pamplona 145, 01405-900, São Paulo, SP-
dc.identifier.doi10.1142/S021773230401566X-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofModern Physics Letters A-
dc.identifier.scopus2-s2.0-11244287594-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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