Optimized δ expansion for the Walecka model

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Federal de Santa Catarina (UFSC)
dc.contributorUniversité de Montpellier II
dc.creatorKrein, G. [UNESP]
dc.creatorMenezes, D. P.
dc.creatorPinto, M. B.
dc.date2014-05-27T11:18:04Z
dc.date2014-05-27T11:18:04Z
dc.date1996-03-07
dc.date.accessioned2023-09-12T07:16:42Z
dc.date.available2023-09-12T07:16:42Z
dc.identifierhttp://www.sciencedirect.com/science/article/pii/0370269395015787
dc.identifierPhysics Letters B. Amsterdam: Elsevier B.V., v. 370, n. 1-2, p. 5-11, 1996.
dc.identifier0370-2693
dc.identifierhttp://hdl.handle.net/11449/130454
dc.identifier10.1016/0370-2693(95)01578-7
dc.identifierWOS:A1996UA24100002
dc.identifier2-s2.0-0041628970
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8779758
dc.descriptionThe 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.
dc.descriptionInst. de Fis. Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo, S.P.
dc.descriptionDepartamento de Física Univ. Federal de Santa Catarina, 88.040-900 Florianopolis, S.C.
dc.descriptionLab. de Physique Mathématique Université de Montpellier II CNRS-URA 768, 34095 Montpellier Cedex 05
dc.descriptionUniversidade Estadual Paulista, Instituto de Física Teórica, Teórica, Rua Pamplona 145, 01405-900 São Paulo, S.P.
dc.format5-11
dc.languageeng
dc.publisherElsevier B.V.
dc.relation4.254
dc.relation2,336
dc.rightsAcesso restrito
dc.sourceScopus
dc.subjectNonperturbative field theory
dc.subjectNuclear matter
dc.subjectRelativistic nuclear models
dc.titleOptimized δ expansion for the Walecka model
dc.typeArtigo


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