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dc.contributor.authorDe Melo, J. P B C-
dc.contributor.authorFrederico, T.-
dc.contributor.authorTomio, Lauro-
dc.contributor.authorDorokhov, A. E.-
dc.identifier.citationNuclear Physics A, v. 623, n. 3-4, p. 456-470, 1997.-
dc.description.abstractThe electromagnetic tensor for inclusive electron scattering off the pion Wμν for momentum transfers such that q+ = 0, (q+ = q0 + q3) is shown to obey a sum-rule for the component W++. From this sum-rule, one can define the quark-antiquark correlation function in the pion, which characterizes the transverse distance distribution between the quark and antiquark in the light-front pion wave-function. Within the realistic models of the relativistic pion wave function (including instanton vacuum inspired wave function) it is shown that the value of the two-quark correlation radius (rqq̄) is near twice the pion electromagnetic radius (rπ), where rπ ≈ 2/3 fm. We also define the correlation length lcorr where the two-particle correlation have an extremum. The estimation of lcorr ≈ 0.3-0,5 fm is very close to estimations from instanton models of QCD vacuum. It is also shown that the above correlation is very sensitive to the pion light-front wave-function models. © 1997 Elsevier Science B.V.en
dc.subjectElectromagnetic form factors-
dc.subjectRelativistic quark model-
dc.subjectSum rules-
dc.titleQuark-antiquark correlation in the pionen
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionCentro Técnico Aeroespacial-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionJt. Institute for Nuclear Research-
dc.description.affiliationInstituto de Física Universidade de São Paulo, 01498-970 São Paulo-
dc.description.affiliationDepartamento de Física ITA Centro Técnico Aeroespacial, 12.228-900 Sao Jose dos Campos-
dc.description.affiliationInst. de Fisica Teórica UNESP, Rua Pamplona, 145, 01405-900 São Paulo-
dc.description.affiliationBogoliubov Theoretical Laboratory Jt. Institute for Nuclear Research, 141980 Dubna-
dc.description.affiliationUnespInst. de Fisica Teórica UNESP, Rua Pamplona, 145, 01405-900 São Paulo-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofNuclear Physics A-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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