Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector

Detalhes bibliográficos
Autor(a) principal: ATLAS collaboration (2858 authors)
Data de Publicação: 2015
Outros Autores: Aguilar-Saavedra, Juan Antonio, Amor Dos Santos, Susana Patricia, Anjos, Nuno, Araque, Juan Pedro, Cantrill, Robert, 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, Lopes, Lourenco, Machado Miguens, Joana, Maio, Amélia, Maneira, José, Onofre, António, Palma, Alberto, Pedro, Rute, Pina, João Antonio, 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/10400.26/26935
Resumo: The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at $ \sqrt{s}=8 $ TeV. The dataset corresponds to an integrated luminosity of 20.3 fb$^{−1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $ t\overline{t}W $ and $ t\overline{t}Z $ processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for $ t\overline{t}W $ ( $ t\overline{t}Z $ ) production. The measured cross sections are $ {\sigma}_{t\overline{t}W}={369}_{-91}^{+100} $ fb and $ {\sigma}_{t\overline{t}Z}={176}_{-52}^{+58} $ fb. The background-only hypothesis with neither $ t\overline{t}W $ nor $ t\overline{t}Z $ production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the $ t\overline{t}W $ and $ t\overline{t}Z $ processes.
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spelling Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detectorThe production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at $ \sqrt{s}=8 $ TeV. The dataset corresponds to an integrated luminosity of 20.3 fb$^{−1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $ t\overline{t}W $ and $ t\overline{t}Z $ processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for $ t\overline{t}W $ ( $ t\overline{t}Z $ ) production. The measured cross sections are $ {\sigma}_{t\overline{t}W}={369}_{-91}^{+100} $ fb and $ {\sigma}_{t\overline{t}Z}={176}_{-52}^{+58} $ fb. The background-only hypothesis with neither $ t\overline{t}W $ nor $ t\overline{t}Z $ production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the $ t\overline{t}W $ and $ t\overline{t}Z $ processes.Repositório ComumATLAS collaboration (2858 authors)Aguilar-Saavedra, Juan AntonioAmor Dos Santos, Susana PatriciaAnjos, NunoAraque, Juan PedroCantrill, RobertCarvalho, JoãoCastro, Nuno FilipeConde Muiño, PatriciaDa Cunha Sargedas De Sousa, Mario JoseFiolhais, MiguelGalhardo, BrunoGomes, AgostinhoGonçalo, RicardoJorge, PedroLopes, LourencoMachado Miguens, JoanaMaio, AméliaManeira, JoséOnofre, AntónioPalma, AlbertoPedro, RutePina, João AntonioSantos, HelenaSaraiva, JoãoSilva, JoséTavares Delgado, AdemarVeloso, FilipeWolters, Helmut2019-02-04T08:09:09Z2015-11-242019-02-04T08:09:09Z2015-11-24T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.26/26935enghttp://dx.doi.org/10.1007/JHEP11(2015)172info: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:RCAAP2024-05-16T07:31:32Zoai:comum.rcaap.pt:10400.26/26935Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-16T07:31:32Repositório 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 Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
title Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
spellingShingle Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
ATLAS collaboration (2858 authors)
title_short Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
title_full Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
title_fullStr Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
title_full_unstemmed Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
title_sort Measurement of the $ t\overline{t}W $ and $ t\overline{t}Z $ production cross sections in pp collisions at $ \sqrt{s}=8 $ TeV with the ATLAS detector
author ATLAS collaboration (2858 authors)
author_facet ATLAS collaboration (2858 authors)
Aguilar-Saavedra, Juan Antonio
Amor Dos Santos, Susana Patricia
Anjos, Nuno
Araque, Juan Pedro
Cantrill, Robert
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
Lopes, Lourenco
Machado Miguens, Joana
Maio, Amélia
Maneira, José
Onofre, António
Palma, Alberto
Pedro, Rute
Pina, João Antonio
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
Cantrill, Robert
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
Lopes, Lourenco
Machado Miguens, Joana
Maio, Amélia
Maneira, José
Onofre, António
Palma, Alberto
Pedro, Rute
Pina, João Antonio
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
author
author
author
dc.contributor.none.fl_str_mv Repositório Comum
dc.contributor.author.fl_str_mv ATLAS collaboration (2858 authors)
Aguilar-Saavedra, Juan Antonio
Amor Dos Santos, Susana Patricia
Anjos, Nuno
Araque, Juan Pedro
Cantrill, Robert
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
Lopes, Lourenco
Machado Miguens, Joana
Maio, Amélia
Maneira, José
Onofre, António
Palma, Alberto
Pedro, Rute
Pina, João Antonio
Santos, Helena
Saraiva, João
Silva, José
Tavares Delgado, Ademar
Veloso, Filipe
Wolters, Helmut
description The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at $ \sqrt{s}=8 $ TeV. The dataset corresponds to an integrated luminosity of 20.3 fb$^{−1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $ t\overline{t}W $ and $ t\overline{t}Z $ processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for $ t\overline{t}W $ ( $ t\overline{t}Z $ ) production. The measured cross sections are $ {\sigma}_{t\overline{t}W}={369}_{-91}^{+100} $ fb and $ {\sigma}_{t\overline{t}Z}={176}_{-52}^{+58} $ fb. The background-only hypothesis with neither $ t\overline{t}W $ nor $ t\overline{t}Z $ production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the $ t\overline{t}W $ and $ t\overline{t}Z $ processes.
publishDate 2015
dc.date.none.fl_str_mv 2015-11-24
2015-11-24T00:00:00Z
2019-02-04T08:09:09Z
2019-02-04T08:09:09Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.26/26935
url http://hdl.handle.net/10400.26/26935
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://dx.doi.org/10.1007/JHEP11(2015)172
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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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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