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dc.contributor.authorDorokhov, A. E.-
dc.contributor.authorBroniowski, W.-
dc.identifier.citationEuropean Physical Journal C. New York: Springer-verlag, v. 32, n. 1, p. 79-96, 2003.-
dc.description.abstractThe behavior of the non-perturbative parts of the isovector-vector and isovector and isosinglet axial-vector correlators at Euclidean momenta is studied in the framework of a covariant chiral quark model with non-local quark-quark interactions. The gauge covariance is ensured with the help of the P-exponents, with the corresponding modification of the quark-current interaction vertices taken into account. The low- and high-momentum behavior of the correlators is compared with the chiral perturbation theory and with the QCD operator product expansion, respectively. The V-A combination of the correlators obtained in the model reproduces quantitatively the ALEPH and OPAL data on hadronic tau decays, transformed into the Euclidean domain via dispersion relations. The predictions for the electromagnetic pi(+/-) - pi(0) mass difference and for the pion electric polarizability are also in agreement with the experimental values. The topological susceptibility of the vacuum is evaluated as a function of the momentum, and its first moment is predicted to be chi'(0) approximate to (50 MeV)(2). In addition, the fulfillment of the Crewther theorem is demonstrated.en
dc.sourceWeb of Science-
dc.titleVector and axial-vector correlators in a non-local chiral quark modelen
dc.contributor.institutionJoint Inst Nucl Res-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionH Niewodniczanski Inst Nucl Phys-
dc.description.affiliationJoint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia-
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.description.affiliationH Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland-
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofEuropean Physical Journal C-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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