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dc.contributor.authorForkel, Hilmar [UNESP]
dc.date.accessioned2014-05-20T14:08:28Z
dc.date.available2014-05-20T14:08:28Z
dc.date.issued2004-09-01
dc.identifierhttp://dx.doi.org/10.1590/S0103-97332004000500045
dc.identifier.citationBrazilian Journal of Physics. Sociedade Brasileira de Física, v. 34, n. 3a, p. 875-878, 2004.
dc.identifier.issn0103-9733
dc.identifier.urihttp://hdl.handle.net/11449/24000
dc.description.abstractTopological charge screening in the QCD vacuum is found to provide crucial nonperturbative contributions to the short-distance expansion of the pseudoscalar (0-+) glueball correlator. The screening contributions enter the Wilson coefficients and are an indispensable complement to the direct instanton contributions. They restore consistency with the anomalous axial Ward identity and remedy several flaws in the 0-+ glueball sum rules caused by direct instantons in the absence of screening (lack of resonance signals, violation of the positivity bound and of the underlying low-energy theorem). The impact of the finite width of the instanton size distribution and the (gauge-invariant) renormalization of the instanton contributions are also discussed. New predictions for the 0-+ glueball mass and decay constant are presented.en
dc.format.extent875-878
dc.language.isoeng
dc.publisherSociedade Brasileira de Física
dc.relation.ispartofBrazilian Journal of Physics
dc.sourceSciELO
dc.titleTopological charge screening and pseudoscalar glueballsen
dc.typeArtigo
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversität Heidelberg Institut für Theoretische Physik
dc.description.affiliationUniversidade Estadual Paulista
dc.description.affiliationUniversität Heidelberg Institut für Theoretische Physik
dc.description.affiliationUnespUniversidade Estadual Paulista
dc.identifier.doi10.1590/S0103-97332004000500045
dc.identifier.scieloS0103-97332004000500045
dc.rights.accessRightsAcesso aberto
dc.identifier.fileS0103-97332004000500045.pdf
dc.relation.ispartofjcr1.082
dc.relation.ispartofsjr0,276
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