Dispersive representation of the pion vector form factor in τ→ππν τ decays

Autores
Gomez Dumm, Daniel Alberto; Roig, P.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We propose a dispersive representation of the charged pion vector form factor that is consistent with chiral symmetry and fulfills the constraints imposed by analyticity and unitarity. Unknown parameters are fitted to the very precise data on τ-→π- π0 ντ decays obtained by Belle, leading to a good description of the corresponding spectral function up to a ππ squared invariant mass s≃1.5 GeV2. We determine the ρ(770) mass and width pole parameters and obtain the values of low-energy observables. The significance of isospin-breaking corrections is also discussed. For larger values of s, this representation is complemented with a phenomenological description to allow its implementation in the new TAUOLA hadronic currents.
Fil: Gomez Dumm, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; Argentina
Fil: Roig, P.. Universitat Autònoma de Barcelona; España
Materia
Tau Lepton Decays
Chiral Symmetry
Vector Meson Physics
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/3412
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/3412
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Dispersive representation of the pion vector form factor in τ→ππν τ decaysGomez Dumm, Daniel AlbertoRoig, P.Tau Lepton DecaysChiral SymmetryVector Meson Physicshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We propose a dispersive representation of the charged pion vector form factor that is consistent with chiral symmetry and fulfills the constraints imposed by analyticity and unitarity. Unknown parameters are fitted to the very precise data on τ-→π- π0 ντ decays obtained by Belle, leading to a good description of the corresponding spectral function up to a ππ squared invariant mass s≃1.5 GeV2. We determine the ρ(770) mass and width pole parameters and obtain the values of low-energy observables. The significance of isospin-breaking corrections is also discussed. For larger values of s, this representation is complemented with a phenomenological description to allow its implementation in the new TAUOLA hadronic currents.Fil: Gomez Dumm, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; ArgentinaFil: Roig, P.. Universitat Autònoma de Barcelona; EspañaSpringer2013-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/3412Gomez Dumm, Daniel Alberto; Roig, P.; Dispersive representation of the pion vector form factor in τ→ππν τ decays; Springer; European Physical Journal C: Particles and Fields; 73; 8; 8-2013; 2528-25281434-6044enginfo:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-013-2528-1info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-013-2528-1info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1301.6973info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:53:32Zoai:ri.conicet.gov.ar:11336/3412instacron: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 11:53:32.745CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dispersive representation of the pion vector form factor in τ→ππν τ decays
title Dispersive representation of the pion vector form factor in τ→ππν τ decays
spellingShingle Dispersive representation of the pion vector form factor in τ→ππν τ decays
Gomez Dumm, Daniel Alberto
Tau Lepton Decays
Chiral Symmetry
Vector Meson Physics
title_short Dispersive representation of the pion vector form factor in τ→ππν τ decays
title_full Dispersive representation of the pion vector form factor in τ→ππν τ decays
title_fullStr Dispersive representation of the pion vector form factor in τ→ππν τ decays
title_full_unstemmed Dispersive representation of the pion vector form factor in τ→ππν τ decays
title_sort Dispersive representation of the pion vector form factor in τ→ππν τ decays
dc.creator.none.fl_str_mv Gomez Dumm, Daniel Alberto
Roig, P.
author Gomez Dumm, Daniel Alberto
author_facet Gomez Dumm, Daniel Alberto
Roig, P.
author_role author
author2 Roig, P.
author2_role author
dc.subject.none.fl_str_mv Tau Lepton Decays
Chiral Symmetry
Vector Meson Physics
topic Tau Lepton Decays
Chiral Symmetry
Vector Meson Physics
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 propose a dispersive representation of the charged pion vector form factor that is consistent with chiral symmetry and fulfills the constraints imposed by analyticity and unitarity. Unknown parameters are fitted to the very precise data on τ-→π- π0 ντ decays obtained by Belle, leading to a good description of the corresponding spectral function up to a ππ squared invariant mass s≃1.5 GeV2. We determine the ρ(770) mass and width pole parameters and obtain the values of low-energy observables. The significance of isospin-breaking corrections is also discussed. For larger values of s, this representation is complemented with a phenomenological description to allow its implementation in the new TAUOLA hadronic currents.
Fil: Gomez Dumm, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; Argentina
Fil: Roig, P.. Universitat Autònoma de Barcelona; España
description We propose a dispersive representation of the charged pion vector form factor that is consistent with chiral symmetry and fulfills the constraints imposed by analyticity and unitarity. Unknown parameters are fitted to the very precise data on τ-→π- π0 ντ decays obtained by Belle, leading to a good description of the corresponding spectral function up to a ππ squared invariant mass s≃1.5 GeV2. We determine the ρ(770) mass and width pole parameters and obtain the values of low-energy observables. The significance of isospin-breaking corrections is also discussed. For larger values of s, this representation is complemented with a phenomenological description to allow its implementation in the new TAUOLA hadronic currents.
publishDate 2013
dc.date.none.fl_str_mv 2013-08
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/11336/3412
Gomez Dumm, Daniel Alberto; Roig, P.; Dispersive representation of the pion vector form factor in τ→ππν τ decays; Springer; European Physical Journal C: Particles and Fields; 73; 8; 8-2013; 2528-2528
1434-6044
url http://hdl.handle.net/11336/3412
identifier_str_mv Gomez Dumm, Daniel Alberto; Roig, P.; Dispersive representation of the pion vector form factor in τ→ππν τ decays; Springer; European Physical Journal C: Particles and Fields; 73; 8; 8-2013; 2528-2528
1434-6044
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-013-2528-1
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-013-2528-1
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1301.6973
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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
_version_ 1846782231092133888
score 12.982451

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