LHC dark matter signals from vector resonances and top partners
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.98.035019 http://hdl.handle.net/11449/228591 |
Resumo: | Extensions of the standard model which address the hierarchy problem and dark matter (DM) often contain top partners and additional resonances at the TeV scale. We explore the phenomenology of a simplified effective model with a vector resonance Z′, a fermionic vectorlike colored partner of the top quark T′ as well as a scalar DM candidate φ and provide publicly available implementations in CalcHEP and MadGraph. We study the pp→Z′→T′T′̄→tt̄φφ process at the LHC and find that it plays an important role in addition to the T′T′̄ production via strong interactions. It turns out that the presence of the Z′ can provide a dominant contribution to the tt̄+ET signature without conflicting with existing bounds from Z′ searches in di-jet and di-lepton final states. We find that, through this process, the LHC is already probing DM masses up to about 900 GeV and top partner masses up to about 1.5 TeV, thus exceeding the current bounds from QCD production alone almost by a factor of 2 for both particles. |
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Repositório Institucional da UNESP |
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LHC dark matter signals from vector resonances and top partnersExtensions of the standard model which address the hierarchy problem and dark matter (DM) often contain top partners and additional resonances at the TeV scale. We explore the phenomenology of a simplified effective model with a vector resonance Z′, a fermionic vectorlike colored partner of the top quark T′ as well as a scalar DM candidate φ and provide publicly available implementations in CalcHEP and MadGraph. We study the pp→Z′→T′T′̄→tt̄φφ process at the LHC and find that it plays an important role in addition to the T′T′̄ production via strong interactions. It turns out that the presence of the Z′ can provide a dominant contribution to the tt̄+ET signature without conflicting with existing bounds from Z′ searches in di-jet and di-lepton final states. We find that, through this process, the LHC is already probing DM masses up to about 900 GeV and top partner masses up to about 1.5 TeV, thus exceeding the current bounds from QCD production alone almost by a factor of 2 for both particles.School of Physics and Astronomy University of SouthamptonParticle Physics Department Rutherford Appleton LaboratoryCenter for Theoretical Physics of the Universe Institute for Basic Science (IBS)ICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual PaulistaSchool of Physics Korea Institute for Advanced StudyICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual PaulistaUniversity of SouthamptonRutherford Appleton LaboratoryInstitute for Basic Science (IBS)Universidade Estadual Paulista (UNESP)Korea Institute for Advanced StudyBelyaev, Alexander S.Flacke, ThomasJain, Bithika [UNESP]Schaefers, Patrick B.2022-04-29T08:27:32Z2022-04-29T08:27:32Z2018-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.98.035019Physical Review D, v. 98, n. 3, 2018.2470-00292470-0010http://hdl.handle.net/11449/22859110.1103/PhysRevD.98.0350192-s2.0-85052991513Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Dinfo:eu-repo/semantics/openAccess2022-04-29T08:27:32Zoai:repositorio.unesp.br:11449/228591Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:33:47.200346Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
LHC dark matter signals from vector resonances and top partners |
title |
LHC dark matter signals from vector resonances and top partners |
spellingShingle |
LHC dark matter signals from vector resonances and top partners Belyaev, Alexander S. |
title_short |
LHC dark matter signals from vector resonances and top partners |
title_full |
LHC dark matter signals from vector resonances and top partners |
title_fullStr |
LHC dark matter signals from vector resonances and top partners |
title_full_unstemmed |
LHC dark matter signals from vector resonances and top partners |
title_sort |
LHC dark matter signals from vector resonances and top partners |
author |
Belyaev, Alexander S. |
author_facet |
Belyaev, Alexander S. Flacke, Thomas Jain, Bithika [UNESP] Schaefers, Patrick B. |
author_role |
author |
author2 |
Flacke, Thomas Jain, Bithika [UNESP] Schaefers, Patrick B. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
University of Southampton Rutherford Appleton Laboratory Institute for Basic Science (IBS) Universidade Estadual Paulista (UNESP) Korea Institute for Advanced Study |
dc.contributor.author.fl_str_mv |
Belyaev, Alexander S. Flacke, Thomas Jain, Bithika [UNESP] Schaefers, Patrick B. |
description |
Extensions of the standard model which address the hierarchy problem and dark matter (DM) often contain top partners and additional resonances at the TeV scale. We explore the phenomenology of a simplified effective model with a vector resonance Z′, a fermionic vectorlike colored partner of the top quark T′ as well as a scalar DM candidate φ and provide publicly available implementations in CalcHEP and MadGraph. We study the pp→Z′→T′T′̄→tt̄φφ process at the LHC and find that it plays an important role in addition to the T′T′̄ production via strong interactions. It turns out that the presence of the Z′ can provide a dominant contribution to the tt̄+ET signature without conflicting with existing bounds from Z′ searches in di-jet and di-lepton final states. We find that, through this process, the LHC is already probing DM masses up to about 900 GeV and top partner masses up to about 1.5 TeV, thus exceeding the current bounds from QCD production alone almost by a factor of 2 for both particles. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-08-01 2022-04-29T08:27:32Z 2022-04-29T08:27:32Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevD.98.035019 Physical Review D, v. 98, n. 3, 2018. 2470-0029 2470-0010 http://hdl.handle.net/11449/228591 10.1103/PhysRevD.98.035019 2-s2.0-85052991513 |
url |
http://dx.doi.org/10.1103/PhysRevD.98.035019 http://hdl.handle.net/11449/228591 |
identifier_str_mv |
Physical Review D, v. 98, n. 3, 2018. 2470-0029 2470-0010 10.1103/PhysRevD.98.035019 2-s2.0-85052991513 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128532916731904 |