Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction
- Autores
- Quirós, J .J.; Barbero, César Alberto; Jaramillo, D. E.; Mariano, Alejandro Edgardo
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We evaluate the total cross section for the π-photoproduction process and analyze the behavior of the Δ(1232) resonance contribution when the photon energy is increased from threshold up to 0.7 GeV. Within this energy range we compare two different parameterizations for the γNΔ vertex: the normal parity and the covariant multipole decomposition ones. For completeness, we also compare different versions for the Δ propagator: the first is the dressed propagator obtained including one-loop self-energy contributions (EXACT), the second is the complex mass scheme which consists in replacing mΔ → mΔ - iΩΔ/2 in the bare propagator, and the third is an intermediate approximation between the two previous ones (EXCMS). We conclude that, in order to extend the present calculation to include more energetic resonances in the future and to obtain non-divergent results for the total cross section we will need to use the MD parametrization and the EXCMS propagator.
Instituto de Física La Plata - Materia
-
Física
Effective lagrangian approach
Resonances
π-photoproduction - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/99533
Ver los metadatos del registro completo
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Different vertex parameterizations and propagators for the Δ contribution in π-photoproductionQuirós, J .J.Barbero, César AlbertoJaramillo, D. E.Mariano, Alejandro EdgardoFísicaEffective lagrangian approachResonancesπ-photoproductionWe evaluate the total cross section for the π-photoproduction process and analyze the behavior of the Δ(1232) resonance contribution when the photon energy is increased from threshold up to 0.7 GeV. Within this energy range we compare two different parameterizations for the γNΔ vertex: the normal parity and the covariant multipole decomposition ones. For completeness, we also compare different versions for the Δ propagator: the first is the dressed propagator obtained including one-loop self-energy contributions (EXACT), the second is the complex mass scheme which consists in replacing mΔ → mΔ - iΩΔ/2 in the bare propagator, and the third is an intermediate approximation between the two previous ones (EXCMS). We conclude that, in order to extend the present calculation to include more energetic resonances in the future and to obtain non-divergent results for the total cross section we will need to use the MD parametrization and the EXCMS propagator.Instituto de Física La Plata2017-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1-12http://sedici.unlp.edu.ar/handle/10915/99533enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/54410info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/1361-6471/aa5eec/metainfo:eu-repo/semantics/altIdentifier/issn/0954-3899info:eu-repo/semantics/altIdentifier/doi/10.1088/1361-6471/aa5eecinfo:eu-repo/semantics/altIdentifier/hdl/11336/54410info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:12:05Zoai:sedici.unlp.edu.ar:10915/99533Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:12:05.555SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| title |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| spellingShingle |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction Quirós, J .J. Física Effective lagrangian approach Resonances π-photoproduction |
| title_short |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| title_full |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| title_fullStr |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| title_full_unstemmed |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| title_sort |
Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction |
| dc.creator.none.fl_str_mv |
Quirós, J .J. Barbero, César Alberto Jaramillo, D. E. Mariano, Alejandro Edgardo |
| author |
Quirós, J .J. |
| author_facet |
Quirós, J .J. Barbero, César Alberto Jaramillo, D. E. Mariano, Alejandro Edgardo |
| author_role |
author |
| author2 |
Barbero, César Alberto Jaramillo, D. E. Mariano, Alejandro Edgardo |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Física Effective lagrangian approach Resonances π-photoproduction |
| topic |
Física Effective lagrangian approach Resonances π-photoproduction |
| dc.description.none.fl_txt_mv |
We evaluate the total cross section for the π-photoproduction process and analyze the behavior of the Δ(1232) resonance contribution when the photon energy is increased from threshold up to 0.7 GeV. Within this energy range we compare two different parameterizations for the γNΔ vertex: the normal parity and the covariant multipole decomposition ones. For completeness, we also compare different versions for the Δ propagator: the first is the dressed propagator obtained including one-loop self-energy contributions (EXACT), the second is the complex mass scheme which consists in replacing mΔ → mΔ - iΩΔ/2 in the bare propagator, and the third is an intermediate approximation between the two previous ones (EXCMS). We conclude that, in order to extend the present calculation to include more energetic resonances in the future and to obtain non-divergent results for the total cross section we will need to use the MD parametrization and the EXCMS propagator. Instituto de Física La Plata |
| description |
We evaluate the total cross section for the π-photoproduction process and analyze the behavior of the Δ(1232) resonance contribution when the photon energy is increased from threshold up to 0.7 GeV. Within this energy range we compare two different parameterizations for the γNΔ vertex: the normal parity and the covariant multipole decomposition ones. For completeness, we also compare different versions for the Δ propagator: the first is the dressed propagator obtained including one-loop self-energy contributions (EXACT), the second is the complex mass scheme which consists in replacing mΔ → mΔ - iΩΔ/2 in the bare propagator, and the third is an intermediate approximation between the two previous ones (EXCMS). We conclude that, in order to extend the present calculation to include more energetic resonances in the future and to obtain non-divergent results for the total cross section we will need to use the MD parametrization and the EXCMS propagator. |
| publishDate |
2017 |
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2017-03 |
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http://sedici.unlp.edu.ar/handle/10915/99533 |
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eng |
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eng |
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