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
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , |
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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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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 |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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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1817545423700623360 |