Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum 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
A search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a Z boson or a pair of jets compatible with a Standard Model (SM) Higgs boson (h) is presented. Requirements on the missing transverse momentum, together with additional selections on leptons, jets, jets identified as originating from b-quarks are imposed to target the other decay products of the top squark pair. The analysis is performed using proton-proton collision data at √s = 13 TeV collected with the ATLAS detector at the LHC in 2015–2016, corresponding to an integrated luminosity of 36.1 fb-1. No excess is observed in the data with respect to the SM predictions. The results are interpreted in two sets of models. In the first set, direct production of pairs of lighter top squarks (t˜1) with long decay chains involving Z or Higgs bosons is considered. The second set includes direct pair production of the heavier top squark pairs (t˜2) decaying via t˜2→ Zt˜1 or t˜2→ ht˜1. The results exclude at 95% confidence level t˜2 and t˜1 masses up to about 800 GeV, extending the exclusion region of supersymmetric parameter space covered by previous LHC searches.
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
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Higgs physics
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:10915/87457

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network_name_str SEDICI (UNLP)
spelling Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum 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 ExactasFísicaBeyond Standard ModelHadron-Hadron scattering (experiments)Higgs physicsA search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a Z boson or a pair of jets compatible with a Standard Model (SM) Higgs boson (h) is presented. Requirements on the missing transverse momentum, together with additional selections on leptons, jets, jets identified as originating from b-quarks are imposed to target the other decay products of the top squark pair. The analysis is performed using proton-proton collision data at √s = 13 TeV collected with the ATLAS detector at the LHC in 2015–2016, corresponding to an integrated luminosity of 36.1 fb<sup>-1</sup>. No excess is observed in the data with respect to the SM predictions. The results are interpreted in two sets of models. In the first set, direct production of pairs of lighter top squarks (t˜<sub>1</sub>) with long decay chains involving Z or Higgs bosons is considered. The second set includes direct pair production of the heavier top squark pairs (t˜<sub>2</sub>) decaying via t˜<sub>2</sub>→ Zt˜<sub>1</sub> or t˜<sub>2</sub>→ ht˜<sub>1</sub>. The results exclude at 95% confidence level t˜<sub>2</sub> and t˜<sub>1</sub> masses up to about 800 GeV, extending the exclusion region of supersymmetric parameter space covered by previous LHC searches.La lista completa de autores que integran el documento puede consultarse en el archivo.Facultad de Ciencias ExactasInstituto de Física La Plata2017info: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/10915/87457enginfo:eu-repo/semantics/altIdentifier/issn/1126-6708info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP08(2017)006info: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:UNLP2025-09-29T11:17:13Zoai:sedici.unlp.edu.ar:10915/87457Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:17:14.229SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
title Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
spellingShingle Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
Alconada Verzini, María Josefina
Ciencias Exactas
Física
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Higgs physics
title_short Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
title_full Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
title_fullStr Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
title_full_unstemmed Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
title_sort Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum 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
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Higgs physics
topic Ciencias Exactas
Física
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Higgs physics
dc.description.none.fl_txt_mv A search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a Z boson or a pair of jets compatible with a Standard Model (SM) Higgs boson (h) is presented. Requirements on the missing transverse momentum, together with additional selections on leptons, jets, jets identified as originating from b-quarks are imposed to target the other decay products of the top squark pair. The analysis is performed using proton-proton collision data at √s = 13 TeV collected with the ATLAS detector at the LHC in 2015–2016, corresponding to an integrated luminosity of 36.1 fb<sup>-1</sup>. No excess is observed in the data with respect to the SM predictions. The results are interpreted in two sets of models. In the first set, direct production of pairs of lighter top squarks (t˜<sub>1</sub>) with long decay chains involving Z or Higgs bosons is considered. The second set includes direct pair production of the heavier top squark pairs (t˜<sub>2</sub>) decaying via t˜<sub>2</sub>→ Zt˜<sub>1</sub> or t˜<sub>2</sub>→ ht˜<sub>1</sub>. The results exclude at 95% confidence level t˜<sub>2</sub> and t˜<sub>1</sub> masses up to about 800 GeV, extending the exclusion region of supersymmetric parameter space covered by previous LHC searches.
La lista completa de autores que integran el documento puede consultarse en el archivo.
Facultad de Ciencias Exactas
Instituto de Física La Plata
description A search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a Z boson or a pair of jets compatible with a Standard Model (SM) Higgs boson (h) is presented. Requirements on the missing transverse momentum, together with additional selections on leptons, jets, jets identified as originating from b-quarks are imposed to target the other decay products of the top squark pair. The analysis is performed using proton-proton collision data at √s = 13 TeV collected with the ATLAS detector at the LHC in 2015–2016, corresponding to an integrated luminosity of 36.1 fb<sup>-1</sup>. No excess is observed in the data with respect to the SM predictions. The results are interpreted in two sets of models. In the first set, direct production of pairs of lighter top squarks (t˜<sub>1</sub>) with long decay chains involving Z or Higgs bosons is considered. The second set includes direct pair production of the heavier top squark pairs (t˜<sub>2</sub>) decaying via t˜<sub>2</sub>→ Zt˜<sub>1</sub> or t˜<sub>2</sub>→ ht˜<sub>1</sub>. The results exclude at 95% confidence level t˜<sub>2</sub> and t˜<sub>1</sub> masses up to about 800 GeV, extending the exclusion region of supersymmetric parameter space covered by previous LHC searches.
publishDate 2017
dc.date.none.fl_str_mv 2017
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/10915/87457
url http://sedici.unlp.edu.ar/handle/10915/87457
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1126-6708
info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP08(2017)006
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
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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