Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector

Autores
Alconada Verzini, María Josefina; Alonso, Francisco; Arduh, Francisco Anuar; Dova, María Teresa; Hoya, Joaquín; Monticelli, Fernando Gabriel; Wahlberg, Hernán Pablo; The ATLAS Collaboration
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb-1 of integrated luminosity from proton–proton collisions at √s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t → bχ±1 into a b-quark and the lightest chargino with χ±1 → Wχ01, the decay t → tχ01 into an on-shell top quark and the lightest neutralino, the three-body decay t → bWχ01 and the four-body decay t → bℓνχ01. No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the t and χ01 masses. The results exclude at 95% confidence level t masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Física
top squark
leptons
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82160
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/82160
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detectorAlconada Verzini, María JosefinaAlonso, FranciscoArduh, Francisco AnuarDova, María TeresaHoya, JoaquínMonticelli, Fernando GabrielWahlberg, Hernán PabloThe ATLAS CollaborationCiencias ExactasFísicatop squarkleptonsThe results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb-1 of integrated luminosity from proton–proton collisions at √s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t → bχ<sup>±</sup><sub>1</sub> into a b-quark and the lightest chargino with χ<sup>±</sup><sub>1</sub> → Wχ<sup>0</sup><sub>1</sub>, the decay t → tχ<sup>0</sup><sub>1</sub> into an on-shell top quark and the lightest neutralino, the three-body decay t → bWχ<sup>0</sup><sub>1</sub> and the four-body decay t → bℓνχ<sup>0</sup><sub>1</sub>. No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the t and χ<sup>0</sup><sub>1</sub> masses. The results exclude at 95% confidence level t masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searchesFacultad de Ciencias Exactas2017-12-22info: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/10915/82160enginfo:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:22Zoai:sedici.unlp.edu.ar:10915/82160Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:22.473SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
title Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
spellingShingle Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
Alconada Verzini, María Josefina
Ciencias Exactas
Física
top squark
leptons
title_short Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
title_full Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
title_fullStr Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
title_full_unstemmed Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
title_sort Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
dc.creator.none.fl_str_mv Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
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
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_role author
author2 Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
top squark
leptons
topic Ciencias Exactas
Física
top squark
leptons
dc.description.none.fl_txt_mv The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb-1 of integrated luminosity from proton–proton collisions at √s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t → bχ<sup>±</sup><sub>1</sub> into a b-quark and the lightest chargino with χ<sup>±</sup><sub>1</sub> → Wχ<sup>0</sup><sub>1</sub>, the decay t → tχ<sup>0</sup><sub>1</sub> into an on-shell top quark and the lightest neutralino, the three-body decay t → bWχ<sup>0</sup><sub>1</sub> and the four-body decay t → bℓνχ<sup>0</sup><sub>1</sub>. No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the t and χ<sup>0</sup><sub>1</sub> masses. The results exclude at 95% confidence level t masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches
Facultad de Ciencias Exactas
description The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb-1 of integrated luminosity from proton–proton collisions at √s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t → bχ<sup>±</sup><sub>1</sub> into a b-quark and the lightest chargino with χ<sup>±</sup><sub>1</sub> → Wχ<sup>0</sup><sub>1</sub>, the decay t → tχ<sup>0</sup><sub>1</sub> into an on-shell top quark and the lightest neutralino, the three-body decay t → bWχ<sup>0</sup><sub>1</sub> and the four-body decay t → bℓνχ<sup>0</sup><sub>1</sub>. No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the t and χ<sup>0</sup><sub>1</sub> masses. The results exclude at 95% confidence level t masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches
publishDate 2017
dc.date.none.fl_str_mv 2017-12-22
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/10915/82160
url http://sedici.unlp.edu.ar/handle/10915/82160
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1434-6052
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
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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score 13.070432

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