Muon-pair and tau-pair production in two-photon collisions at LEP

Autores
Dova, María Teresa; L3 Collaboration
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The QED processes e+e− → e+e−μ+μ− and e+e− → e+e−τ+τ− are studied with the L3 detector at LEP using an untagged data sample collected at centre-of-mass energies 161 GeV ≤ √s 209 GeV. The τ -pairs are observed through the associated decay of one τ into eνν and the other into ππν. The cross sections are measured as a function of √s. For muon pairs, the cross section of the γ γ → μ+μ− process is also measured as a function of the two-photon centre-of-mass energy for 3 GeV ≤ Wγγ 40 GeV. Good agreement is found between these measurements and the O(α4) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Física
Fotones
L3 detector
large electron positron collider
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/79918

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network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Muon-pair and tau-pair production in two-photon collisions at LEPDova, María TeresaL3 CollaborationCiencias ExactasFísicaFotonesL3 detectorlarge electron positron colliderThe QED processes e+e− → e+e−μ+μ− and e+e− → e+e−τ+τ− are studied with the L3 detector at LEP using an untagged data sample collected at centre-of-mass energies 161 GeV ≤ √s 209 GeV. The τ -pairs are observed through the associated decay of one τ into eνν and the other into ππν. The cross sections are measured as a function of √s. For muon pairs, the cross section of the γ γ → μ+μ− process is also measured as a function of the two-photon centre-of-mass energy for 3 GeV ≤ W<sub>γγ</sub> 40 GeV. Good agreement is found between these measurements and the O(α<sup>4</sup>) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.Facultad de Ciencias Exactas2004-04-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf53-62http://sedici.unlp.edu.ar/handle/10915/79918enginfo:eu-repo/semantics/altIdentifier/issn/0370-2693info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2004.02.012info: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:UNLP2025-10-15T11:04:14Zoai:sedici.unlp.edu.ar:10915/79918Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:04:14.919SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Muon-pair and tau-pair production in two-photon collisions at LEP
title Muon-pair and tau-pair production in two-photon collisions at LEP
spellingShingle Muon-pair and tau-pair production in two-photon collisions at LEP
Dova, María Teresa
Ciencias Exactas
Física
Fotones
L3 detector
large electron positron collider
title_short Muon-pair and tau-pair production in two-photon collisions at LEP
title_full Muon-pair and tau-pair production in two-photon collisions at LEP
title_fullStr Muon-pair and tau-pair production in two-photon collisions at LEP
title_full_unstemmed Muon-pair and tau-pair production in two-photon collisions at LEP
title_sort Muon-pair and tau-pair production in two-photon collisions at LEP
dc.creator.none.fl_str_mv Dova, María Teresa
L3 Collaboration
author Dova, María Teresa
author_facet Dova, María Teresa
L3 Collaboration
author_role author
author2 L3 Collaboration
author2_role author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
Fotones
L3 detector
large electron positron collider
topic Ciencias Exactas
Física
Fotones
L3 detector
large electron positron collider
dc.description.none.fl_txt_mv The QED processes e+e− → e+e−μ+μ− and e+e− → e+e−τ+τ− are studied with the L3 detector at LEP using an untagged data sample collected at centre-of-mass energies 161 GeV ≤ √s 209 GeV. The τ -pairs are observed through the associated decay of one τ into eνν and the other into ππν. The cross sections are measured as a function of √s. For muon pairs, the cross section of the γ γ → μ+μ− process is also measured as a function of the two-photon centre-of-mass energy for 3 GeV ≤ W<sub>γγ</sub> 40 GeV. Good agreement is found between these measurements and the O(α<sup>4</sup>) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.
Facultad de Ciencias Exactas
description The QED processes e+e− → e+e−μ+μ− and e+e− → e+e−τ+τ− are studied with the L3 detector at LEP using an untagged data sample collected at centre-of-mass energies 161 GeV ≤ √s 209 GeV. The τ -pairs are observed through the associated decay of one τ into eνν and the other into ππν. The cross sections are measured as a function of √s. For muon pairs, the cross section of the γ γ → μ+μ− process is also measured as a function of the two-photon centre-of-mass energy for 3 GeV ≤ W<sub>γγ</sub> 40 GeV. Good agreement is found between these measurements and the O(α<sup>4</sup>) QED expectations. In addition, limits on the anomalous magnetic and electric dipole moments of the τ lepton are extracted.
publishDate 2004
dc.date.none.fl_str_mv 2004-04-08
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/10915/79918
url http://sedici.unlp.edu.ar/handle/10915/79918
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0370-2693
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2004.02.012
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
53-62
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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