Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex

Detalhes bibliográficos
Autor(a) principal: Ayala, Alejandro
Data de Publicação: 2022
Outros Autores: Castaño-Yepes, Jorge David, Hernández, L. A., Mizher, Ana Julia [UNESP], Tejeda-Yeomans, María Elena, Zamora, R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevC.106.064905
http://hdl.handle.net/11449/248175
Resumo: Having in mind the pre-equilibrium stage in peripheral heavy-ion collisions as a possible scenario for the production of electromagnetic radiation, we compute the two-gluon one-photon vertex in the presence of an intense magnetic field at one-loop order. The quarks in the loop are taken such that two of them occupy the lowest Landau level, with the third one occupying the first excited Landau level. When the field strength is the largest of the energy (squared) scales, the tensor basis describing this vertex corresponds to two of the three-vector particles polarized in the longitudinal direction whereas the third one is polarized in the transverse direction. However, when the photon energy is of the same order as or larger than the field strength, the explicit one-loop computation contains extra tensor structures that spoil the properties of the basis compared with the case when the field strength is the largest of the energy scales, which signals that the calculation is incomplete. Nevertheless, by projecting the result onto the would-be basis, we show that the squared amplitude for processes involving two gluons and one photon exhibits the expected properties such as a preferred in-plane photon emission and a slightly decreasing strength for an increasing magnetic-field strength. We comment on possible venues to improve the one-loop calculation that include accounting for progressive occupation of the three quarks of the lowest and first-excited Landau levels such that, still working in the large field limit, a more complete description can be achieved when the photon energy increases.
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spelling Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertexHaving in mind the pre-equilibrium stage in peripheral heavy-ion collisions as a possible scenario for the production of electromagnetic radiation, we compute the two-gluon one-photon vertex in the presence of an intense magnetic field at one-loop order. The quarks in the loop are taken such that two of them occupy the lowest Landau level, with the third one occupying the first excited Landau level. When the field strength is the largest of the energy (squared) scales, the tensor basis describing this vertex corresponds to two of the three-vector particles polarized in the longitudinal direction whereas the third one is polarized in the transverse direction. However, when the photon energy is of the same order as or larger than the field strength, the explicit one-loop computation contains extra tensor structures that spoil the properties of the basis compared with the case when the field strength is the largest of the energy scales, which signals that the calculation is incomplete. Nevertheless, by projecting the result onto the would-be basis, we show that the squared amplitude for processes involving two gluons and one photon exhibits the expected properties such as a preferred in-plane photon emission and a slightly decreasing strength for an increasing magnetic-field strength. We comment on possible venues to improve the one-loop calculation that include accounting for progressive occupation of the three quarks of the lowest and first-excited Landau levels such that, still working in the large field limit, a more complete description can be achieved when the photon energy increases.Instituto de Ciencias Nucleares Universidad Nacional Autónoma de México, Apartado Postal 70-543Centre for Theoretical and Mathematical Physics Department of Physics University of Cape TownDepartamento de Física Universidade Federal de Santa Maria, RSInstituto de Física Pontificia Universidad Católica de Chile, Vicuña MackennaDepartamento de Física Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, C.PFacultad de Ciencias de la Educación Universidad Autónoma de TlaxcalaInstituto de Física Teórica Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II, SPCentro de Ciencias Exactas Universidad Del Bío-Bío, Avda. Andrés Bello 720, Casilla 447Facultad de Ciencias - CUICBAS Universidad de Colima, Bernal Díaz del Castillo No. 340, Col. Villas San SebastiánPerimeter Institute for Theoretical Physics, 31 Caroline StreetInstituto de Ciencias Básicas Universidad Diego Portales, Casilla 298-VCentro de Investigación y Desarrollo en Ciencias Aeroespaciales (CIDCA) Fuerza Aérea de Chile, CasillaInstituto de Física Teórica Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II, SPUniversidad Nacional Autónoma de MéxicoUniversity of Cape TownUniversidade Federal de Santa MariaPontificia Universidad Católica de ChileUniversidad Autónoma Metropolitana-IztapalapaUniversidad Autónoma de TlaxcalaUniversidade Estadual Paulista (UNESP)Universidad Del Bío-BíoUniversidad de ColimaPerimeter Institute for Theoretical PhysicsUniversidad Diego PortalesFuerza Aérea de ChileAyala, AlejandroCastaño-Yepes, Jorge DavidHernández, L. A.Mizher, Ana Julia [UNESP]Tejeda-Yeomans, María ElenaZamora, R.2023-07-29T13:36:35Z2023-07-29T13:36:35Z2022-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevC.106.064905Physical Review C, v. 106, n. 6, 2022.2469-99932469-9985http://hdl.handle.net/11449/24817510.1103/PhysRevC.106.0649052-s2.0-85146126066Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Cinfo:eu-repo/semantics/openAccess2023-07-29T13:36:35Zoai:repositorio.unesp.br:11449/248175Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:38:43.662300Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
title Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
spellingShingle Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
Ayala, Alejandro
title_short Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
title_full Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
title_fullStr Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
title_full_unstemmed Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
title_sort Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background: The two-gluon one-photon vertex
author Ayala, Alejandro
author_facet Ayala, Alejandro
Castaño-Yepes, Jorge David
Hernández, L. A.
Mizher, Ana Julia [UNESP]
Tejeda-Yeomans, María Elena
Zamora, R.
author_role author
author2 Castaño-Yepes, Jorge David
Hernández, L. A.
Mizher, Ana Julia [UNESP]
Tejeda-Yeomans, María Elena
Zamora, R.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Nacional Autónoma de México
University of Cape Town
Universidade Federal de Santa Maria
Pontificia Universidad Católica de Chile
Universidad Autónoma Metropolitana-Iztapalapa
Universidad Autónoma de Tlaxcala
Universidade Estadual Paulista (UNESP)
Universidad Del Bío-Bío
Universidad de Colima
Perimeter Institute for Theoretical Physics
Universidad Diego Portales
Fuerza Aérea de Chile
dc.contributor.author.fl_str_mv Ayala, Alejandro
Castaño-Yepes, Jorge David
Hernández, L. A.
Mizher, Ana Julia [UNESP]
Tejeda-Yeomans, María Elena
Zamora, R.
description Having in mind the pre-equilibrium stage in peripheral heavy-ion collisions as a possible scenario for the production of electromagnetic radiation, we compute the two-gluon one-photon vertex in the presence of an intense magnetic field at one-loop order. The quarks in the loop are taken such that two of them occupy the lowest Landau level, with the third one occupying the first excited Landau level. When the field strength is the largest of the energy (squared) scales, the tensor basis describing this vertex corresponds to two of the three-vector particles polarized in the longitudinal direction whereas the third one is polarized in the transverse direction. However, when the photon energy is of the same order as or larger than the field strength, the explicit one-loop computation contains extra tensor structures that spoil the properties of the basis compared with the case when the field strength is the largest of the energy scales, which signals that the calculation is incomplete. Nevertheless, by projecting the result onto the would-be basis, we show that the squared amplitude for processes involving two gluons and one photon exhibits the expected properties such as a preferred in-plane photon emission and a slightly decreasing strength for an increasing magnetic-field strength. We comment on possible venues to improve the one-loop calculation that include accounting for progressive occupation of the three quarks of the lowest and first-excited Landau levels such that, still working in the large field limit, a more complete description can be achieved when the photon energy increases.
publishDate 2022
dc.date.none.fl_str_mv 2022-12-01
2023-07-29T13:36:35Z
2023-07-29T13:36:35Z
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.106.064905
Physical Review C, v. 106, n. 6, 2022.
2469-9993
2469-9985
http://hdl.handle.net/11449/248175
10.1103/PhysRevC.106.064905
2-s2.0-85146126066
url http://dx.doi.org/10.1103/PhysRevC.106.064905
http://hdl.handle.net/11449/248175
identifier_str_mv Physical Review C, v. 106, n. 6, 2022.
2469-9993
2469-9985
10.1103/PhysRevC.106.064905
2-s2.0-85146126066
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.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)
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