Ghost poles in the nucleon propagator: Vertex corrections and form factors

Detalhes bibliográficos
Autor(a) principal: Krein, G. [UNESP]
Data de Publicação: 1993
Outros Autores: Nielsen, M., Puff, R. D., Wilets, L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevC.47.2485
http://hdl.handle.net/11449/223812
Resumo: Vertex corrections are taken into account in the Schwinger-Dyson equation for the nucleon propagator in a relativistic field theory of fermions and mesons. The usual Hartree-Fock approximation for the nucleon propagator is known to produce the appearance of complex (ghost) poles which violate basic theorems of quantum field theory. In a theory with vector mesons there are vertex corrections that produce a strongly damped vertex function in the ultraviolet. One set of such corrections is known as the Sudakov form factor in quantum electrodynamics. When the Sudakov form factor generated by massive neutral vector mesons is included in the Hartree-Fock approximation to the Schwinger-Dyson equation for the nucleon propagator, the ghost poles disappear and consistency with basic requirements of quantum field theory is recovered. © 1993 The American Physical Society.
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spelling Ghost poles in the nucleon propagator: Vertex corrections and form factorsVertex corrections are taken into account in the Schwinger-Dyson equation for the nucleon propagator in a relativistic field theory of fermions and mesons. The usual Hartree-Fock approximation for the nucleon propagator is known to produce the appearance of complex (ghost) poles which violate basic theorems of quantum field theory. In a theory with vector mesons there are vertex corrections that produce a strongly damped vertex function in the ultraviolet. One set of such corrections is known as the Sudakov form factor in quantum electrodynamics. When the Sudakov form factor generated by massive neutral vector mesons is included in the Hartree-Fock approximation to the Schwinger-Dyson equation for the nucleon propagator, the ghost poles disappear and consistency with basic requirements of quantum field theory is recovered. © 1993 The American Physical Society.Instituto de Física Teórica, Universidade Estadual Paulista, Rua Pamplona, 145-01405 Sao PauloInstituto de Física, Universidade de Sao Paulo, Caixa Postal, 20516-01498 Sao PauloDepartment of Physics, FM-15, University of Washington, Seattle, WA 98195Instituto de Física Teórica, Universidade Estadual Paulista, Rua Pamplona, 145-01405 Sao PauloUniversidade Estadual Paulista (UNESP)Universidade de São Paulo (USP)Krein, G. [UNESP]Nielsen, M.Puff, R. D.Wilets, L.2022-04-28T19:53:15Z2022-04-28T19:53:15Z1993-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2485-2491http://dx.doi.org/10.1103/PhysRevC.47.2485Physical Review C, v. 47, n. 6, p. 2485-2491, 1993.0556-2813http://hdl.handle.net/11449/22381210.1103/PhysRevC.47.24852-s2.0-0000320717Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Cinfo:eu-repo/semantics/openAccess2022-04-28T19:53:15Zoai:repositorio.unesp.br:11449/223812Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:56:21.106676Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Ghost poles in the nucleon propagator: Vertex corrections and form factors
title Ghost poles in the nucleon propagator: Vertex corrections and form factors
spellingShingle Ghost poles in the nucleon propagator: Vertex corrections and form factors
Krein, G. [UNESP]
title_short Ghost poles in the nucleon propagator: Vertex corrections and form factors
title_full Ghost poles in the nucleon propagator: Vertex corrections and form factors
title_fullStr Ghost poles in the nucleon propagator: Vertex corrections and form factors
title_full_unstemmed Ghost poles in the nucleon propagator: Vertex corrections and form factors
title_sort Ghost poles in the nucleon propagator: Vertex corrections and form factors
author Krein, G. [UNESP]
author_facet Krein, G. [UNESP]
Nielsen, M.
Puff, R. D.
Wilets, L.
author_role author
author2 Nielsen, M.
Puff, R. D.
Wilets, L.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Krein, G. [UNESP]
Nielsen, M.
Puff, R. D.
Wilets, L.
description Vertex corrections are taken into account in the Schwinger-Dyson equation for the nucleon propagator in a relativistic field theory of fermions and mesons. The usual Hartree-Fock approximation for the nucleon propagator is known to produce the appearance of complex (ghost) poles which violate basic theorems of quantum field theory. In a theory with vector mesons there are vertex corrections that produce a strongly damped vertex function in the ultraviolet. One set of such corrections is known as the Sudakov form factor in quantum electrodynamics. When the Sudakov form factor generated by massive neutral vector mesons is included in the Hartree-Fock approximation to the Schwinger-Dyson equation for the nucleon propagator, the ghost poles disappear and consistency with basic requirements of quantum field theory is recovered. © 1993 The American Physical Society.
publishDate 1993
dc.date.none.fl_str_mv 1993-01-01
2022-04-28T19:53:15Z
2022-04-28T19:53:15Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1103/PhysRevC.47.2485
Physical Review C, v. 47, n. 6, p. 2485-2491, 1993.
0556-2813
http://hdl.handle.net/11449/223812
10.1103/PhysRevC.47.2485
2-s2.0-0000320717
url http://dx.doi.org/10.1103/PhysRevC.47.2485
http://hdl.handle.net/11449/223812
identifier_str_mv Physical Review C, v. 47, n. 6, p. 2485-2491, 1993.
0556-2813
10.1103/PhysRevC.47.2485
2-s2.0-0000320717
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Physical Review C
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 2485-2491
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129476386619392

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