Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector

Detalhes bibliográficos
Autor(a) principal: ATLAS collaboration (2854 authors)
Data de Publicação: 2017
Outros Autores: Aguilar-Saavedra, Juan Antonio, Amor Dos Santos, Susana Patricia, Anjos, Nuno, Araque, Juan Pedro, Carvalho, João, Castro, Nuno Filipe, Conde Muiño, Patricia, Da Cunha Sargedas De Sousa, Mario Jose, Fiolhais, Miguel, Galhardo, Bruno, Gomes, Agostinho, Gonçalo, Ricardo, Jorge, Pedro, Machado Miguens, Joana, Maio, Amélia, Maneira, José, Oleiro Seabra, Luis Filipe, Onofre, António, Pedro, Rute, Santos, Helena, Saraiva, João, Silva, José, Tavares Delgado, Ademar, Veloso, Filipe, Wolters, Helmut
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.26/27257
Resumo: Measurements of top quark spin observables in $ t\overline{t} $ events are presented based on 20.2 fb$^{−1}$ of $ \sqrt{s}=8 $ TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of $ t\overline{t} $ production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable.
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spelling Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detectorMeasurements of top quark spin observables in $ t\overline{t} $ events are presented based on 20.2 fb$^{−1}$ of $ \sqrt{s}=8 $ TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of $ t\overline{t} $ production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable.Repositório ComumATLAS collaboration (2854 authors)Aguilar-Saavedra, Juan AntonioAmor Dos Santos, Susana PatriciaAnjos, NunoAraque, Juan PedroCarvalho, JoãoCastro, Nuno FilipeConde Muiño, PatriciaDa Cunha Sargedas De Sousa, Mario JoseFiolhais, MiguelGalhardo, BrunoGomes, AgostinhoGonçalo, RicardoJorge, PedroMachado Miguens, JoanaMaio, AméliaManeira, JoséOleiro Seabra, Luis FilipeOnofre, AntónioPedro, RuteSantos, HelenaSaraiva, JoãoSilva, JoséTavares Delgado, AdemarVeloso, FilipeWolters, Helmut2019-02-04T12:01:00Z2017-03-222019-02-04T12:01:00Z2017-03-22T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.26/27257enghttp://dx.doi.org/10.1007/JHEP03(2017)113info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-16T07:35:38Zoai:comum.rcaap.pt:10400.26/27257Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-16T07:35:38Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
title Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
spellingShingle Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
ATLAS collaboration (2854 authors)
title_short Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
title_full Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
title_fullStr Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
title_full_unstemmed Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
title_sort Measurements of top quark spin observables in $ t\overline{t} $ events using dilepton final states in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector
author ATLAS collaboration (2854 authors)
author_facet ATLAS collaboration (2854 authors)
Aguilar-Saavedra, Juan Antonio
Amor Dos Santos, Susana Patricia
Anjos, Nuno
Araque, Juan Pedro
Carvalho, João
Castro, Nuno Filipe
Conde Muiño, Patricia
Da Cunha Sargedas De Sousa, Mario Jose
Fiolhais, Miguel
Galhardo, Bruno
Gomes, Agostinho
Gonçalo, Ricardo
Jorge, Pedro
Machado Miguens, Joana
Maio, Amélia
Maneira, José
Oleiro Seabra, Luis Filipe
Onofre, António
Pedro, Rute
Santos, Helena
Saraiva, João
Silva, José
Tavares Delgado, Ademar
Veloso, Filipe
Wolters, Helmut
author_role author
author2 Aguilar-Saavedra, Juan Antonio
Amor Dos Santos, Susana Patricia
Anjos, Nuno
Araque, Juan Pedro
Carvalho, João
Castro, Nuno Filipe
Conde Muiño, Patricia
Da Cunha Sargedas De Sousa, Mario Jose
Fiolhais, Miguel
Galhardo, Bruno
Gomes, Agostinho
Gonçalo, Ricardo
Jorge, Pedro
Machado Miguens, Joana
Maio, Amélia
Maneira, José
Oleiro Seabra, Luis Filipe
Onofre, António
Pedro, Rute
Santos, Helena
Saraiva, João
Silva, José
Tavares Delgado, Ademar
Veloso, Filipe
Wolters, Helmut
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Comum
dc.contributor.author.fl_str_mv ATLAS collaboration (2854 authors)
Aguilar-Saavedra, Juan Antonio
Amor Dos Santos, Susana Patricia
Anjos, Nuno
Araque, Juan Pedro
Carvalho, João
Castro, Nuno Filipe
Conde Muiño, Patricia
Da Cunha Sargedas De Sousa, Mario Jose
Fiolhais, Miguel
Galhardo, Bruno
Gomes, Agostinho
Gonçalo, Ricardo
Jorge, Pedro
Machado Miguens, Joana
Maio, Amélia
Maneira, José
Oleiro Seabra, Luis Filipe
Onofre, António
Pedro, Rute
Santos, Helena
Saraiva, João
Silva, José
Tavares Delgado, Ademar
Veloso, Filipe
Wolters, Helmut
description Measurements of top quark spin observables in $ t\overline{t} $ events are presented based on 20.2 fb$^{−1}$ of $ \sqrt{s}=8 $ TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of $ t\overline{t} $ production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable.
publishDate 2017
dc.date.none.fl_str_mv 2017-03-22
2017-03-22T00:00:00Z
2019-02-04T12:01:00Z
2019-02-04T12:01:00Z
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://hdl.handle.net/10400.26/27257
url http://hdl.handle.net/10400.26/27257
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://dx.doi.org/10.1007/JHEP03(2017)113
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
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instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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