Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/222861 |
Resumo: | Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT). The data correspond to an integrated luminosity of 41.5 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, collected by the CMS experiment in 2017. The selected events are required to have either two leptons with the same charge or more than two leptons; jets, including identified bottom quark jets, are also required, and the selected events are divided into categories based on the multiplicities of these objects. Sixteen dimension-six operators that can affect processes involving top quarks produced with additional charged leptons are considered in this analysis. Constructed to target EFT effects directly, the analysis applies a novel approach in which the observed yields are parameterized in terms of the Wilson coefficients (WCs) of the EFT operators. A simultaneous fit of the 16 WCs to the data is performed and two standard deviation confidence intervals for the WCs are extracted; the standard model expectations for the WC values are within these intervals for all of the WCs probed. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2021-06-25T04:25:58Z20211029-8479http://hdl.handle.net/10183/222861001125210Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT). The data correspond to an integrated luminosity of 41.5 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, collected by the CMS experiment in 2017. The selected events are required to have either two leptons with the same charge or more than two leptons; jets, including identified bottom quark jets, are also required, and the selected events are divided into categories based on the multiplicities of these objects. Sixteen dimension-six operators that can affect processes involving top quarks produced with additional charged leptons are considered in this analysis. Constructed to target EFT effects directly, the analysis applies a novel approach in which the observed yields are parameterized in terms of the Wilson coefficients (WCs) of the EFT operators. A simultaneous fit of the 16 WCs to the data is performed and two standard deviation confidence intervals for the WCs are extracted; the standard model expectations for the WC values are within these intervals for all of the WCs probed.application/pdfengThe journal of high energy physics. Trieste. No. 3 (Mar. 2021), 095, 55 p.Aceleradores de partículasColisões proton-protonLeptonsBeyond standard modelHadron-Hadron scattering (experiments)Top physicsSearch for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theoryEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001125210.pdf.txt001125210.pdf.txtExtracted Texttext/plain140896http://www.lume.ufrgs.br/bitstream/10183/222861/2/001125210.pdf.txtc897c38b2de3f5cc1e4f9b6e714c2cabMD52ORIGINAL001125210.pdfTexto completo (inglês)application/pdf892200http://www.lume.ufrgs.br/bitstream/10183/222861/1/001125210.pdf800f3a83426abe0fa96db9e8ae38bd82MD5110183/2228612023-07-22 03:41:32.311026oai:www.lume.ufrgs.br:10183/222861Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:41:32Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
title |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
spellingShingle |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton Leptons Beyond standard model Hadron-Hadron scattering (experiments) Top physics |
title_short |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
title_full |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
title_fullStr |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
title_full_unstemmed |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
title_sort |
Search for new physics in top quark production with additional leptons in proton-proton collisions at √s = 13 TeV using effective field theory |
author |
Sirunyan, A. M. |
author_facet |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da CMS Collaboration |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Colisões proton-proton Leptons |
topic |
Aceleradores de partículas Colisões proton-proton Leptons Beyond standard model Hadron-Hadron scattering (experiments) Top physics |
dc.subject.eng.fl_str_mv |
Beyond standard model Hadron-Hadron scattering (experiments) Top physics |
description |
Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT). The data correspond to an integrated luminosity of 41.5 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, collected by the CMS experiment in 2017. The selected events are required to have either two leptons with the same charge or more than two leptons; jets, including identified bottom quark jets, are also required, and the selected events are divided into categories based on the multiplicities of these objects. Sixteen dimension-six operators that can affect processes involving top quarks produced with additional charged leptons are considered in this analysis. Constructed to target EFT effects directly, the analysis applies a novel approach in which the observed yields are parameterized in terms of the Wilson coefficients (WCs) of the EFT operators. A simultaneous fit of the 16 WCs to the data is performed and two standard deviation confidence intervals for the WCs are extracted; the standard model expectations for the WC values are within these intervals for all of the WCs probed. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-06-25T04:25:58Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/222861 |
dc.identifier.issn.pt_BR.fl_str_mv |
1029-8479 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001125210 |
identifier_str_mv |
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url |
http://hdl.handle.net/10183/222861 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The journal of high energy physics. Trieste. No. 3 (Mar. 2021), 095, 55 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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