Renormalization of the ladder light-front Bethe-Salpeter equation in the Yukawa model

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dc.contributor.authorSales, J. H O [UNESP]
dc.contributor.authorFrederico, T.
dc.contributor.authorCarlson, B. V.
dc.contributor.authorSauer, P. U.
dc.contributor.institutionCentro Técnico Aeroespacial
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity Hannover
dc.date.accessioned2014-05-27T11:20:16Z
dc.date.available2014-05-27T11:20:16Z
dc.date.issued2001-06-01
dc.description.abstractThe reduction of the two-fermion Bethe-Salpeter equation in the framework of light-front dynamics is studied for the Yukawa model. It yields auxiliary three-dimensional quantities for the transition matrix and the bound state. The arising effective interaction can be perturbatively expanded in powers of the coupling constant gs allowing a defined number of boson exchanges; it is divergent and needs renormalization; it also includes the instantaneous term of the Dirac propagator. One possible solution of the renormalization problem of the boson exchanges is shown to be provided by expanding the effective interaction beyond single boson exchange. The effective interaction in ladder approximation up to order g4 s is discussed in detail. It is shown that the effective interaction naturally yields the box counterterm required to be introduced ad hoc previously. The covariant results of the Bethe-Salpeter equation can be recovered from the corresponding auxiliary three-dimensional quantities.en
dc.description.affiliationDepartamento de Física Inst. Tecn. de Aeronáutica Centro Técnico Aeroespacial, São Paulo
dc.description.affiliationInst. de Fis. Teórica Universidade Estadual Paulista, 01405-900 São Paulo
dc.description.affiliationInstitute for Theoretical Physics University Hannover, D-30167 Hannover
dc.description.affiliationUnespInst. de Fis. Teórica Universidade Estadual Paulista, 01405-900 São Paulo
dc.format.extent640031-6400320
dc.identifierhttp://dx.doi.org/10.1103/PhysRevC.63.064003
dc.identifier.citationPhysical Review C - Nuclear Physics, v. 63, n. 6, p. 640031-6400320, 2001.
dc.identifier.doi10.1103/PhysRevC.63.064003
dc.identifier.file2-s2.0-0039191483.pdf
dc.identifier.issn0556-2813
dc.identifier.scopus2-s2.0-0039191483
dc.identifier.urihttp://hdl.handle.net/11449/66525
dc.identifier.wosWOS:000169182200014
dc.language.isoeng
dc.relation.ispartofPhysical Review C: Nuclear Physics
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.titleRenormalization of the ladder light-front Bethe-Salpeter equation in the Yukawa modelen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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