Shape of the Delta baryon in a covariant spectator quark model

Detalhes bibliográficos
Autor(a) principal: Ramalho, Gilberto
Data de Publicação: 2012
Outros Autores: Peña, Maria Teresa, Stadler, Alfred
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/6489
Resumo: Using a covariant spectator quark model that describes the recent lattice QCD data for the electromagnetic form factors and all available experimental data on gamma N --> Delta transitions, we analyze the charge and magnetic dipole distributions of the Delta baryon and discuss its shape. We conclude that the quadrupole moment of the Delta is a good indicator of the deformation and that the Delta+ charge distribution has an oblate shape. We also calculate transverse moments and find that they do not lead to unambiguous conclusions about the underlying shape.
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spelling Shape of the Delta baryon in a covariant spectator quark modelDelta baryonQuark-diquark modelCovariant Spectator TheoryDensity distributionsUsing a covariant spectator quark model that describes the recent lattice QCD data for the electromagnetic form factors and all available experimental data on gamma N --> Delta transitions, we analyze the charge and magnetic dipole distributions of the Delta baryon and discuss its shape. We conclude that the quadrupole moment of the Delta is a good indicator of the deformation and that the Delta+ charge distribution has an oblate shape. We also calculate transverse moments and find that they do not lead to unambiguous conclusions about the underlying shape.The American Physical Society2012-12-05T21:35:49Z2012-12-052012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/6489http://hdl.handle.net/10174/6489engPhys. Rev. D 86, 093022 (2012)http://link.aps.org/doi/10.1103/PhysRevD.86.093022gilberto@cftp.ist.utl.ptteresa.pena@ist.utl.ptstadler@uevora.pt347Ramalho, GilbertoPeña, Maria TeresaStadler, Alfredinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:45:29Zoai:dspace.uevora.pt:10174/6489Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:01.546060Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Shape of the Delta baryon in a covariant spectator quark model
title Shape of the Delta baryon in a covariant spectator quark model
spellingShingle Shape of the Delta baryon in a covariant spectator quark model
Ramalho, Gilberto
Delta baryon
Quark-diquark model
Covariant Spectator Theory
Density distributions
title_short Shape of the Delta baryon in a covariant spectator quark model
title_full Shape of the Delta baryon in a covariant spectator quark model
title_fullStr Shape of the Delta baryon in a covariant spectator quark model
title_full_unstemmed Shape of the Delta baryon in a covariant spectator quark model
title_sort Shape of the Delta baryon in a covariant spectator quark model
author Ramalho, Gilberto
author_facet Ramalho, Gilberto
Peña, Maria Teresa
Stadler, Alfred
author_role author
author2 Peña, Maria Teresa
Stadler, Alfred
author2_role author
author
dc.contributor.author.fl_str_mv Ramalho, Gilberto
Peña, Maria Teresa
Stadler, Alfred
dc.subject.por.fl_str_mv Delta baryon
Quark-diquark model
Covariant Spectator Theory
Density distributions
topic Delta baryon
Quark-diquark model
Covariant Spectator Theory
Density distributions
description Using a covariant spectator quark model that describes the recent lattice QCD data for the electromagnetic form factors and all available experimental data on gamma N --> Delta transitions, we analyze the charge and magnetic dipole distributions of the Delta baryon and discuss its shape. We conclude that the quadrupole moment of the Delta is a good indicator of the deformation and that the Delta+ charge distribution has an oblate shape. We also calculate transverse moments and find that they do not lead to unambiguous conclusions about the underlying shape.
publishDate 2012
dc.date.none.fl_str_mv 2012-12-05T21:35:49Z
2012-12-05
2012-01-01T00:00:00Z
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://hdl.handle.net/10174/6489
http://hdl.handle.net/10174/6489
url http://hdl.handle.net/10174/6489
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Phys. Rev. D 86, 093022 (2012)
http://link.aps.org/doi/10.1103/PhysRevD.86.093022
gilberto@cftp.ist.utl.pt
teresa.pena@ist.utl.pt
stadler@uevora.pt
347
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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