Weak decays of magnetized charged pions in the symmetric gauge

Autores
Coppola, Máximo; Gomez Dumm, Daniel Alberto; Noguera, Santiago; Scoccola, Norberto Nerio
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We consider the decay π-→lνl (l=e-,μ-) in the presence of an arbitrary large uniform magnetic field, using the symmetric gauge. The consequences of the axial symmetry of the problem and the issue of angular momentum conservation are discussed in detail. In particular, we analyze the projection of both the canonical and the mechanical total angular momenta along the direction of the magnetic field. It is found that while the former is conserved in the symmetric gauge, the latter is not conserved in both the symmetric and Landau gauges. We derive an expression for the integrated π-→lνl width that coincides exactly with the one we previously found using the Landau gauge, providing an explicit test of the gauge independence of that result. Such an expression implies that for nonzero magnetic fields the decay width does not vanish in the limit in which the outgoing charged leptons can be considered as massless, i.e., it does not exhibit the helicity suppression found in the case of no external field.
Fil: Coppola, Máximo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
Fil: Gomez Dumm, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Noguera, Santiago. Consejo Superior de Investigaciones Científicas; España. Universidad de Valencia; España
Fil: Scoccola, Norberto Nerio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
Materia
Hadronic decays
Leptonic, semileptonic & radiative decays
Nonperturbative effects in field theory
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/168280
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Weak decays of magnetized charged pions in the symmetric gaugeCoppola, MáximoGomez Dumm, Daniel AlbertoNoguera, SantiagoScoccola, Norberto NerioHadronic decaysLeptonic, semileptonic & radiative decaysNonperturbative effects in field theoryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We consider the decay π-→lνl (l=e-,μ-) in the presence of an arbitrary large uniform magnetic field, using the symmetric gauge. The consequences of the axial symmetry of the problem and the issue of angular momentum conservation are discussed in detail. In particular, we analyze the projection of both the canonical and the mechanical total angular momenta along the direction of the magnetic field. It is found that while the former is conserved in the symmetric gauge, the latter is not conserved in both the symmetric and Landau gauges. We derive an expression for the integrated π-→lνl width that coincides exactly with the one we previously found using the Landau gauge, providing an explicit test of the gauge independence of that result. Such an expression implies that for nonzero magnetic fields the decay width does not vanish in the limit in which the outgoing charged leptons can be considered as massless, i.e., it does not exhibit the helicity suppression found in the case of no external field.Fil: Coppola, Máximo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaFil: Gomez Dumm, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Noguera, Santiago. Consejo Superior de Investigaciones Científicas; España. Universidad de Valencia; EspañaFil: Scoccola, Norberto Nerio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaAmerican Physical Society2020-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/168280Coppola, Máximo; Gomez Dumm, Daniel Alberto; Noguera, Santiago; Scoccola, Norberto Nerio; Weak decays of magnetized charged pions in the symmetric gauge; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 101; 3; 2-2020; 1-132470-00102470-0029CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.101.034003info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.101.034003info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:42:18Zoai:ri.conicet.gov.ar:11336/168280instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:42:18.46CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Weak decays of magnetized charged pions in the symmetric gauge
title Weak decays of magnetized charged pions in the symmetric gauge
spellingShingle Weak decays of magnetized charged pions in the symmetric gauge
Coppola, Máximo
Hadronic decays
Leptonic, semileptonic & radiative decays
Nonperturbative effects in field theory
title_short Weak decays of magnetized charged pions in the symmetric gauge
title_full Weak decays of magnetized charged pions in the symmetric gauge
title_fullStr Weak decays of magnetized charged pions in the symmetric gauge
title_full_unstemmed Weak decays of magnetized charged pions in the symmetric gauge
title_sort Weak decays of magnetized charged pions in the symmetric gauge
dc.creator.none.fl_str_mv Coppola, Máximo
Gomez Dumm, Daniel Alberto
Noguera, Santiago
Scoccola, Norberto Nerio
author Coppola, Máximo
author_facet Coppola, Máximo
Gomez Dumm, Daniel Alberto
Noguera, Santiago
Scoccola, Norberto Nerio
author_role author
author2 Gomez Dumm, Daniel Alberto
Noguera, Santiago
Scoccola, Norberto Nerio
author2_role author
author
author
dc.subject.none.fl_str_mv Hadronic decays
Leptonic, semileptonic & radiative decays
Nonperturbative effects in field theory
topic Hadronic decays
Leptonic, semileptonic & radiative decays
Nonperturbative effects in field theory
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We consider the decay π-→lνl (l=e-,μ-) in the presence of an arbitrary large uniform magnetic field, using the symmetric gauge. The consequences of the axial symmetry of the problem and the issue of angular momentum conservation are discussed in detail. In particular, we analyze the projection of both the canonical and the mechanical total angular momenta along the direction of the magnetic field. It is found that while the former is conserved in the symmetric gauge, the latter is not conserved in both the symmetric and Landau gauges. We derive an expression for the integrated π-→lνl width that coincides exactly with the one we previously found using the Landau gauge, providing an explicit test of the gauge independence of that result. Such an expression implies that for nonzero magnetic fields the decay width does not vanish in the limit in which the outgoing charged leptons can be considered as massless, i.e., it does not exhibit the helicity suppression found in the case of no external field.
Fil: Coppola, Máximo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
Fil: Gomez Dumm, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Noguera, Santiago. Consejo Superior de Investigaciones Científicas; España. Universidad de Valencia; España
Fil: Scoccola, Norberto Nerio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
description We consider the decay π-→lνl (l=e-,μ-) in the presence of an arbitrary large uniform magnetic field, using the symmetric gauge. The consequences of the axial symmetry of the problem and the issue of angular momentum conservation are discussed in detail. In particular, we analyze the projection of both the canonical and the mechanical total angular momenta along the direction of the magnetic field. It is found that while the former is conserved in the symmetric gauge, the latter is not conserved in both the symmetric and Landau gauges. We derive an expression for the integrated π-→lνl width that coincides exactly with the one we previously found using the Landau gauge, providing an explicit test of the gauge independence of that result. Such an expression implies that for nonzero magnetic fields the decay width does not vanish in the limit in which the outgoing charged leptons can be considered as massless, i.e., it does not exhibit the helicity suppression found in the case of no external field.
publishDate 2020
dc.date.none.fl_str_mv 2020-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/168280
Coppola, Máximo; Gomez Dumm, Daniel Alberto; Noguera, Santiago; Scoccola, Norberto Nerio; Weak decays of magnetized charged pions in the symmetric gauge; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 101; 3; 2-2020; 1-13
2470-0010
2470-0029
CONICET Digital
CONICET
url http://hdl.handle.net/11336/168280
identifier_str_mv Coppola, Máximo; Gomez Dumm, Daniel Alberto; Noguera, Santiago; Scoccola, Norberto Nerio; Weak decays of magnetized charged pions in the symmetric gauge; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 101; 3; 2-2020; 1-13
2470-0010
2470-0029
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.101.034003
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.101.034003
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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