Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC

Autores
Alconada Verzini, María Josefina; Alonso, Francisco; Arduh, Francisco Anuar; Dova, María Teresa; Monticelli, Fernando Gabriel; Wahlberg, Hernán Pablo; The ATLAS Collaboration
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This paper presents a search for Higgs bosons decaying to four leptons, either electrons or muons, via one or two light exotic gauge bosons Zd, H→ZZd→4ℓ or H→ZdZd→4ℓ. The search was performed using pp collision data corresponding to an integrated luminosity of about 20 fb-1 at the center-of-mass energy of √s = 8 TeV recorded with the ATLAS detector at the Large Hadron Collider. The observed data are well described by the Standard Model prediction. Upper bounds on the branching ratio of H→ZZd→4ℓ and on the kinetic mixing parameter between the Zd and the Standard Model hypercharge gauge boson are set in the range (1-9)×10-5 and (4-17)×10-2 respectively, at 95% confidence level assuming the Standard Model branching ratio of H→ZZ*→4ℓ, for Zd masses between 15 and 55 GeV. Upper bounds on the effective mass mixing parameter between the Z and the Zd are also set using the branching ratio limits in the H→ZZd→4ℓ search, and are in the range (1.5-8.7)×10-4 for 15Zd<35 GeV. Upper bounds on the branching ratio of H→ZdZd→4ℓ and on the Higgs portal coupling parameter, controlling the strength of the coupling of the Higgs boson to dark vector bosons are set in the range (2-3)×10-5 and (1-10)×10-4 respectively, at 95% confidence level assuming the Standard Model Higgs boson production cross sections, for Zd masses between 15 and 60 GeV.
La lista completa de autores que integran el documento puede consultarse en el archivo.
Facultad de Ciencias Exactas
Instituto de Física La Plata
Materia
Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/3.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/86910

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network_name_str SEDICI (UNLP)
spelling Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHCAlconada Verzini, María JosefinaAlonso, FranciscoArduh, Francisco AnuarDova, María TeresaMonticelli, Fernando GabrielWahlberg, Hernán PabloThe ATLAS CollaborationCiencias ExactasFísicaproton-proton collisionsATLAS detectorThis paper presents a search for Higgs bosons decaying to four leptons, either electrons or muons, via one or two light exotic gauge bosons Z<sub>d</sub>, H→ZZ<sub>d</sub>→4ℓ or H→Z<sub>d</sub>Z<sub>d</sub>→4ℓ. The search was performed using pp collision data corresponding to an integrated luminosity of about 20 fb<sup>-1</sup> at the center-of-mass energy of √s = 8 TeV recorded with the ATLAS detector at the Large Hadron Collider. The observed data are well described by the Standard Model prediction. Upper bounds on the branching ratio of H→ZZ<sub>d</sub>→4ℓ and on the kinetic mixing parameter between the Z<sub>d</sub> and the Standard Model hypercharge gauge boson are set in the range (1-9)×10<sup>-5</sup> and (4-17)×10-2 respectively, at 95% confidence level assuming the Standard Model branching ratio of H→ZZ*→4ℓ, for Z<sub>d</sub> masses between 15 and 55 GeV. Upper bounds on the effective mass mixing parameter between the Z and the Z<sub>d</sub> are also set using the branching ratio limits in the H→ZZ<sub>d</sub>→4ℓ search, and are in the range (1.5-8.7)×10<sup>-4</sup> for 15<m<SUB>Z<sub>d</sub></SUB><35 GeV. Upper bounds on the branching ratio of H→Z<sub>d</sub>Z<sub>d</sub>→4ℓ and on the Higgs portal coupling parameter, controlling the strength of the coupling of the Higgs boson to dark vector bosons are set in the range (2-3)×10<sup>-5</sup> and (1-10)×10<sup>-4</sup> respectively, at 95% confidence level assuming the Standard Model Higgs boson production cross sections, for Z<sub>d</sub> masses between 15 and 60 GeV.La lista completa de autores que integran el documento puede consultarse en el archivo.Facultad de Ciencias ExactasInstituto de Física La Plata2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/86910enginfo:eu-repo/semantics/altIdentifier/issn/1550-7998info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.92.092001info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/Creative Commons Attribution 3.0 Unported (CC BY 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:54Zoai:sedici.unlp.edu.ar:10915/86910Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:54.462SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
title Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
spellingShingle Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
Alconada Verzini, María Josefina
Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
title_short Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
title_full Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
title_fullStr Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
title_full_unstemmed Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
title_sort Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at √s = 8 TeV with the ATLAS detector at the LHC
dc.creator.none.fl_str_mv Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author Alconada Verzini, María Josefina
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_role author
author2 Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
topic Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
dc.description.none.fl_txt_mv This paper presents a search for Higgs bosons decaying to four leptons, either electrons or muons, via one or two light exotic gauge bosons Z<sub>d</sub>, H→ZZ<sub>d</sub>→4ℓ or H→Z<sub>d</sub>Z<sub>d</sub>→4ℓ. The search was performed using pp collision data corresponding to an integrated luminosity of about 20 fb<sup>-1</sup> at the center-of-mass energy of √s = 8 TeV recorded with the ATLAS detector at the Large Hadron Collider. The observed data are well described by the Standard Model prediction. Upper bounds on the branching ratio of H→ZZ<sub>d</sub>→4ℓ and on the kinetic mixing parameter between the Z<sub>d</sub> and the Standard Model hypercharge gauge boson are set in the range (1-9)×10<sup>-5</sup> and (4-17)×10-2 respectively, at 95% confidence level assuming the Standard Model branching ratio of H→ZZ*→4ℓ, for Z<sub>d</sub> masses between 15 and 55 GeV. Upper bounds on the effective mass mixing parameter between the Z and the Z<sub>d</sub> are also set using the branching ratio limits in the H→ZZ<sub>d</sub>→4ℓ search, and are in the range (1.5-8.7)×10<sup>-4</sup> for 15<m<SUB>Z<sub>d</sub></SUB><35 GeV. Upper bounds on the branching ratio of H→Z<sub>d</sub>Z<sub>d</sub>→4ℓ and on the Higgs portal coupling parameter, controlling the strength of the coupling of the Higgs boson to dark vector bosons are set in the range (2-3)×10<sup>-5</sup> and (1-10)×10<sup>-4</sup> respectively, at 95% confidence level assuming the Standard Model Higgs boson production cross sections, for Z<sub>d</sub> masses between 15 and 60 GeV.
La lista completa de autores que integran el documento puede consultarse en el archivo.
Facultad de Ciencias Exactas
Instituto de Física La Plata
description This paper presents a search for Higgs bosons decaying to four leptons, either electrons or muons, via one or two light exotic gauge bosons Z<sub>d</sub>, H→ZZ<sub>d</sub>→4ℓ or H→Z<sub>d</sub>Z<sub>d</sub>→4ℓ. The search was performed using pp collision data corresponding to an integrated luminosity of about 20 fb<sup>-1</sup> at the center-of-mass energy of √s = 8 TeV recorded with the ATLAS detector at the Large Hadron Collider. The observed data are well described by the Standard Model prediction. Upper bounds on the branching ratio of H→ZZ<sub>d</sub>→4ℓ and on the kinetic mixing parameter between the Z<sub>d</sub> and the Standard Model hypercharge gauge boson are set in the range (1-9)×10<sup>-5</sup> and (4-17)×10-2 respectively, at 95% confidence level assuming the Standard Model branching ratio of H→ZZ*→4ℓ, for Z<sub>d</sub> masses between 15 and 55 GeV. Upper bounds on the effective mass mixing parameter between the Z and the Z<sub>d</sub> are also set using the branching ratio limits in the H→ZZ<sub>d</sub>→4ℓ search, and are in the range (1.5-8.7)×10<sup>-4</sup> for 15<m<SUB>Z<sub>d</sub></SUB><35 GeV. Upper bounds on the branching ratio of H→Z<sub>d</sub>Z<sub>d</sub>→4ℓ and on the Higgs portal coupling parameter, controlling the strength of the coupling of the Higgs boson to dark vector bosons are set in the range (2-3)×10<sup>-5</sup> and (1-10)×10<sup>-4</sup> respectively, at 95% confidence level assuming the Standard Model Higgs boson production cross sections, for Z<sub>d</sub> masses between 15 and 60 GeV.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/86910
url http://sedici.unlp.edu.ar/handle/10915/86910
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1550-7998
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.92.092001
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
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