Transition form factors: γ∗+p → Δ (1232), Δ (1600)
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.100.034001 http://hdl.handle.net/11449/228716 |
Resumo: | Electroproduction form factors describing the γ∗p→Δ+(1232), Δ+(1600) transitions are computed using a fully dynamical diquark-quark approximation to the Poincaré-covariant three-body bound-state problem in relativistic quantum field theory. In this approach, the Δ(1600) is an analogue of the Roper resonance in the nucleon sector, appearing as the simplest radial excitation of the Δ(1232). Precise measurements of the γ∗p→Δ+(1232) transition already exist on 0≤Q2≲8 GeV2, and the calculated results compare favorably with the data outside the meson-cloud domain. The predictions for the γ∗p→Δ+(1600) magnetic dipole and electric quadrupole transition form factors are consistent with the empirical values at the real photon point, and extend to Q2≈6mp2, enabling a meaningful direct comparison with experiment once analysis of existing data is completed. In both cases, the electric quadrupole form factor is particularly sensitive to deformation of the Δ-baryons. Interestingly, while the γ∗p→Δ+(1232) transition form factors are larger in magnitude than those for γ∗p→Δ+(1600) in some neighborhood of the real photon point, this ordering is reversed on Q2≳2mp2, suggesting that the γ∗p→Δ+(1600) transition is more localized in configuration space. |
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Transition form factors: γ∗+p → Δ (1232), Δ (1600)Electroproduction form factors describing the γ∗p→Δ+(1232), Δ+(1600) transitions are computed using a fully dynamical diquark-quark approximation to the Poincaré-covariant three-body bound-state problem in relativistic quantum field theory. In this approach, the Δ(1600) is an analogue of the Roper resonance in the nucleon sector, appearing as the simplest radial excitation of the Δ(1232). Precise measurements of the γ∗p→Δ+(1232) transition already exist on 0≤Q2≲8 GeV2, and the calculated results compare favorably with the data outside the meson-cloud domain. The predictions for the γ∗p→Δ+(1600) magnetic dipole and electric quadrupole transition form factors are consistent with the empirical values at the real photon point, and extend to Q2≈6mp2, enabling a meaningful direct comparison with experiment once analysis of existing data is completed. In both cases, the electric quadrupole form factor is particularly sensitive to deformation of the Δ-baryons. Interestingly, while the γ∗p→Δ+(1232) transition form factors are larger in magnitude than those for γ∗p→Δ+(1600) in some neighborhood of the real photon point, this ordering is reversed on Q2≳2mp2, suggesting that the γ∗p→Δ+(1600) transition is more localized in configuration space.Department of Physics Nanjing UniversityInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271Physics Division Argonne National LaboratoryInstitute for Advanced Simulation Forschungszentrum Jülich JARADepartamento de Sistemas Físicos Químicos y Naturales Universidad Pablo de OlavideJoint Center for Particle Nuclear Physics and CosmologyInstitut für Theoretische Physik Justus-Liebig-Universität GießenInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271Nanjing UniversityUniversidade Estadual Paulista (UNESP)Argonne National LaboratoryJARAUniversidad Pablo de OlavideNuclear Physics and CosmologyJustus-Liebig-Universität GießenLu, Y.Chen, C. [UNESP]Cui, Z. F.Roberts, C. D.Schmidt, S. M.Segovia, J.Zong, H. S.2022-04-29T08:28:22Z2022-04-29T08:28:22Z2019-08-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.100.034001Physical Review D, v. 100, n. 3, 2019.2470-00292470-0010http://hdl.handle.net/11449/22871610.1103/PhysRevD.100.0340012-s2.0-85072063384Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Dinfo:eu-repo/semantics/openAccess2022-04-29T08:28:22Zoai:repositorio.unesp.br:11449/228716Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:42:16.364547Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
title |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
spellingShingle |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) Lu, Y. |
title_short |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
title_full |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
title_fullStr |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
title_full_unstemmed |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
title_sort |
Transition form factors: γ∗+p → Δ (1232), Δ (1600) |
author |
Lu, Y. |
author_facet |
Lu, Y. Chen, C. [UNESP] Cui, Z. F. Roberts, C. D. Schmidt, S. M. Segovia, J. Zong, H. S. |
author_role |
author |
author2 |
Chen, C. [UNESP] Cui, Z. F. Roberts, C. D. Schmidt, S. M. Segovia, J. Zong, H. S. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Nanjing University Universidade Estadual Paulista (UNESP) Argonne National Laboratory JARA Universidad Pablo de Olavide Nuclear Physics and Cosmology Justus-Liebig-Universität Gießen |
dc.contributor.author.fl_str_mv |
Lu, Y. Chen, C. [UNESP] Cui, Z. F. Roberts, C. D. Schmidt, S. M. Segovia, J. Zong, H. S. |
description |
Electroproduction form factors describing the γ∗p→Δ+(1232), Δ+(1600) transitions are computed using a fully dynamical diquark-quark approximation to the Poincaré-covariant three-body bound-state problem in relativistic quantum field theory. In this approach, the Δ(1600) is an analogue of the Roper resonance in the nucleon sector, appearing as the simplest radial excitation of the Δ(1232). Precise measurements of the γ∗p→Δ+(1232) transition already exist on 0≤Q2≲8 GeV2, and the calculated results compare favorably with the data outside the meson-cloud domain. The predictions for the γ∗p→Δ+(1600) magnetic dipole and electric quadrupole transition form factors are consistent with the empirical values at the real photon point, and extend to Q2≈6mp2, enabling a meaningful direct comparison with experiment once analysis of existing data is completed. In both cases, the electric quadrupole form factor is particularly sensitive to deformation of the Δ-baryons. Interestingly, while the γ∗p→Δ+(1232) transition form factors are larger in magnitude than those for γ∗p→Δ+(1600) in some neighborhood of the real photon point, this ordering is reversed on Q2≳2mp2, suggesting that the γ∗p→Δ+(1600) transition is more localized in configuration space. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-08-05 2022-04-29T08:28:22Z 2022-04-29T08:28:22Z |
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/PhysRevD.100.034001 Physical Review D, v. 100, n. 3, 2019. 2470-0029 2470-0010 http://hdl.handle.net/11449/228716 10.1103/PhysRevD.100.034001 2-s2.0-85072063384 |
url |
http://dx.doi.org/10.1103/PhysRevD.100.034001 http://hdl.handle.net/11449/228716 |
identifier_str_mv |
Physical Review D, v. 100, n. 3, 2019. 2470-0029 2470-0010 10.1103/PhysRevD.100.034001 2-s2.0-85072063384 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
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1808128404395917312 |