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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/130454
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dc.contributor.authorKrein, G.-
dc.contributor.authorMenezes, D. P.-
dc.contributor.authorPinto, M. B.-
dc.date.accessioned2014-05-27T11:18:04Z-
dc.date.accessioned2016-10-25T21:21:12Z-
dc.date.available2014-05-27T11:18:04Z-
dc.date.available2016-10-25T21:21:12Z-
dc.date.issued1996-03-07-
dc.identifierhttp://www.sciencedirect.com/science/article/pii/0370269395015787-
dc.identifier.citationPhysics Letters B. Amsterdam: Elsevier B.V., v. 370, n. 1-2, p. 5-11, 1996.-
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/11449/130454-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/130454-
dc.description.abstractThe optimized δ-expansion is used to study vacuum polarization effects in the Walecka model. The optimized δ-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. Vacuum effects on self-energies and the energy density of nuclear matter are studied up to script O sign(δ2). When exchange diagrams are neglected, the traditional relativistic Hartree approximation (RHA) results are exactly reproduced and, using the same set of parameters that saturate nuclear matter in the RHA, a new stable, tightly bound state at high density is found.en
dc.format.extent5-11-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.sourceScopus-
dc.subjectNonperturbative field theory-
dc.subjectNuclear matter-
dc.subjectRelativistic nuclear models-
dc.titleOptimized δ expansion for the Walecka modelen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)-
dc.contributor.institutionUniversité de Montpellier II-
dc.description.affiliationInst. de Fis. Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo, S.P.-
dc.description.affiliationDepartamento de Física Univ. Federal de Santa Catarina, 88.040-900 Florianopolis, S.C.-
dc.description.affiliationLab. de Physique Mathématique Université de Montpellier II CNRS-URA 768, 34095 Montpellier Cedex 05-
dc.description.affiliationUnespUniversidade Estadual Paulista, Instituto de Física Teórica, Teórica, Rua Pamplona 145, 01405-900 São Paulo, S.P.-
dc.identifier.doihttp://dx.doi.org/10.1016/0370-2693(95)01578-7-
dc.identifier.wosWOS:A1996UA24100002-
dc.rights.accessRightsAcesso restrito-
dc.identifier.scopus2-s2.0-0041628970-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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