Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters

Autores
López Castro, Gabriel; Mariano, Alejandro Edgardo
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The elastic and radiative π+p scattering are studied in the framework of an effective Lagrangian model for the Δ++ resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Δ++) and background contributions (ρ0, σ, Δ, and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the Δ++ obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative p+p scattering is mD++=(6.14 ± 0.51) nuclear magnetons
Departamento de Física
Materia
Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/138779
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/138779
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Unstable Particles, Gauge Invariance and the Δ++ Resonance ParametersLópez Castro, GabrielMariano, Alejandro EdgardoFísicaCiencias ExactasLagrangian modelanalytic S-matrix theoryelectromagnetic gauge invarianceThe elastic and radiative π+p scattering are studied in the framework of an effective Lagrangian model for the Δ++ resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Δ++) and background contributions (ρ0, σ, Δ, and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the Δ++ obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative p+p scattering is mD++=(6.14 ± 0.51) nuclear magnetonsDepartamento de Física2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf719-734http://sedici.unlp.edu.ar/handle/10915/138779enginfo:eu-repo/semantics/altIdentifier/issn/0015-9018info:eu-repo/semantics/altIdentifier/issn/1572-9516info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1025692722386info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-11-12T10:56:09Zoai:sedici.unlp.edu.ar:10915/138779Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-11-12 10:56:09.726SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
spellingShingle Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
López Castro, Gabriel
Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
title_short Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_full Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_fullStr Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_full_unstemmed Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
title_sort Unstable Particles, Gauge Invariance and the Δ++ Resonance Parameters
dc.creator.none.fl_str_mv López Castro, Gabriel
Mariano, Alejandro Edgardo
author López Castro, Gabriel
author_facet López Castro, Gabriel
Mariano, Alejandro Edgardo
author_role author
author2 Mariano, Alejandro Edgardo
author2_role author
dc.subject.none.fl_str_mv Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
topic Física
Ciencias Exactas
Lagrangian model
analytic S-matrix theory
electromagnetic gauge invariance
dc.description.none.fl_txt_mv The elastic and radiative π+p scattering are studied in the framework of an effective Lagrangian model for the Δ++ resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Δ++) and background contributions (ρ0, σ, Δ, and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the Δ++ obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative p+p scattering is mD++=(6.14 ± 0.51) nuclear magnetons
Departamento de Física
description The elastic and radiative π+p scattering are studied in the framework of an effective Lagrangian model for the Δ++ resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Δ++) and background contributions (ρ0, σ, Δ, and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the Δ++ obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative p+p scattering is mD++=(6.14 ± 0.51) nuclear magnetons
publishDate 2003
dc.date.none.fl_str_mv 2003
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/138779
url http://sedici.unlp.edu.ar/handle/10915/138779
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0015-9018
info:eu-repo/semantics/altIdentifier/issn/1572-9516
info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1025692722386
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
719-734
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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