Formation of the η<sub>c</sub> in two-photon collisions at LEP

Autores: Dova, María Teresa; L3 Collaboration
Año de publicación: 1999
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: The two-photon width Γ_γγ of the η_c meson has been measured with the L3 detector at LEP. The η_c is studied in the decay modes π+π−π+π−, π+π−K+K−, K0sK±π∓, K+K−π0, π+π−η, π+π−η′, and ρ+ρ− using an integrated luminosity of 140 pb⁻¹ at √ $s ≃91$ GeV and of 52 pb⁻¹ at √s ≃ 183 GeV. The result is Γ_γγ (η_c)=6.9±1.7 stat ± 0.8 sys ± 2.0(BR) keV. The Q² dependence of the η_c cross section is studied for Q² < 9 GeV2. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a ρ-pole. In addition, a signal of 29±11 events is observed at the χ_c0 mass. Upper limits for the two-photon widths of the χ_c0, χ_c2, and η_′c are also given.
Facultad de Ciencias Exactas
Materia: Ciencias Exactas
Física
L3 detector
Fotones
large electron positron collider
Nivel de accesibilidad: acceso abierto
Condiciones de uso: http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Institución: Universidad Nacional de La Plata
OAI Identificador: oai:sedici.unlp.edu.ar:10915/79983

Acceder

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network_name_str	SEDICI (UNLP)
spelling	Formation of the η<sub>c</sub> in two-photon collisions at LEPDova, María TeresaL3 CollaborationCiencias ExactasFísicaL3 detectorFotoneslarge electron positron colliderThe two-photon width Γ<sub>γγ</sub> of the η<sub>c</sub> meson has been measured with the L3 detector at LEP. The η<sub>c</sub> is studied in the decay modes π+π−π+π−, π+π−K+K−, K0sK±π∓, K+K−π0, π+π−η, π+π−η′, and ρ+ρ− using an integrated luminosity of 140 pb<sup>−1</sup> at √<math><mtext>s</mtext><mtext>≃91</mtext></math> GeV and of 52 pb<sup>−1</sup> at √s ≃ 183 GeV. The result is Γ<sub>γγ</sub> (η<sub>c</sub>)=6.9±1.7 stat ± 0.8 sys ± 2.0(BR) keV. The Q<sup>2</sup> dependence of the η<sub>c</sub> cross section is studied for Q<sup>2</sup> < 9 GeV2. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a ρ-pole. In addition, a signal of 29±11 events is observed at the χ<sub>c0</sub> mass. Upper limits for the two-photon widths of the χ<sub>c0</sub>, χ<sub>c2</sub>, and η<sub>′c</sub> are also given.Facultad de Ciencias Exactas1999-08-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf155-166http://sedici.unlp.edu.ar/handle/10915/79983enginfo:eu-repo/semantics/altIdentifier/issn/0370-2693info:eu-repo/semantics/altIdentifier/doi/10.1016/S0370-2693(99)00784-4info: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:UNLP2025-10-15T11:04:23Zoai:sedici.unlp.edu.ar:10915/79983Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:04:23.876SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv	Formation of the η<sub>c</sub> in two-photon collisions at LEP
title	Formation of the η<sub>c</sub> in two-photon collisions at LEP
spellingShingle	Formation of the η<sub>c</sub> in two-photon collisions at LEP Dova, María Teresa Ciencias Exactas Física L3 detector Fotones large electron positron collider
title_short	Formation of the η<sub>c</sub> in two-photon collisions at LEP
title_full	Formation of the η<sub>c</sub> in two-photon collisions at LEP
title_fullStr	Formation of the η<sub>c</sub> in two-photon collisions at LEP
title_full_unstemmed	Formation of the η<sub>c</sub> in two-photon collisions at LEP
title_sort	Formation of the η<sub>c</sub> 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 L3 detector Fotones large electron positron collider
topic	Ciencias Exactas Física L3 detector Fotones large electron positron collider
dc.description.none.fl_txt_mv	The two-photon width Γ<sub>γγ</sub> of the η<sub>c</sub> meson has been measured with the L3 detector at LEP. The η<sub>c</sub> is studied in the decay modes π+π−π+π−, π+π−K+K−, K0sK±π∓, K+K−π0, π+π−η, π+π−η′, and ρ+ρ− using an integrated luminosity of 140 pb<sup>−1</sup> at √<math><mtext>s</mtext><mtext>≃91</mtext></math> GeV and of 52 pb<sup>−1</sup> at √s ≃ 183 GeV. The result is Γ<sub>γγ</sub> (η<sub>c</sub>)=6.9±1.7 stat ± 0.8 sys ± 2.0(BR) keV. The Q<sup>2</sup> dependence of the η<sub>c</sub> cross section is studied for Q<sup>2</sup> < 9 GeV2. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a ρ-pole. In addition, a signal of 29±11 events is observed at the χ<sub>c0</sub> mass. Upper limits for the two-photon widths of the χ<sub>c0</sub>, χ<sub>c2</sub>, and η<sub>′c</sub> are also given. Facultad de Ciencias Exactas
description	The two-photon width Γ<sub>γγ</sub> of the η<sub>c</sub> meson has been measured with the L3 detector at LEP. The η<sub>c</sub> is studied in the decay modes π+π−π+π−, π+π−K+K−, K0sK±π∓, K+K−π0, π+π−η, π+π−η′, and ρ+ρ− using an integrated luminosity of 140 pb<sup>−1</sup> at √<math><mtext>s</mtext><mtext>≃91</mtext></math> GeV and of 52 pb<sup>−1</sup> at √s ≃ 183 GeV. The result is Γ<sub>γγ</sub> (η<sub>c</sub>)=6.9±1.7 stat ± 0.8 sys ± 2.0(BR) keV. The Q<sup>2</sup> dependence of the η<sub>c</sub> cross section is studied for Q<sup>2</sup> < 9 GeV2. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a ρ-pole. In addition, a signal of 29±11 events is observed at the χ<sub>c0</sub> mass. Upper limits for the two-photon widths of the χ<sub>c0</sub>, χ<sub>c2</sub>, and η<sub>′c</sub> are also given.
publishDate	1999
dc.date.none.fl_str_mv	1999-08-19
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/10915/79983
url	http://sedici.unlp.edu.ar/handle/10915/79983
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/S0370-2693(99)00784-4
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 155-166
dc.source.none.fl_str_mv	reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP
reponame_str	SEDICI (UNLP)
collection	SEDICI (UNLP)
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instacron_str	UNLP
institution	UNLP
repository.name.fl_str_mv	SEDICI (UNLP) - Universidad Nacional de La Plata
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score	13.22299

Formation of the η<sub>c</sub> in two-photon collisions at LEP

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