Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV

Detalhes bibliográficos
Autor(a) principal: Sirunyan, A. M.
Data de Publicação: 2021
Outros Autores: Silveira, Gustavo Gil da, CMS Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/235117
Resumo: A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137  fb−1. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.
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spelling Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2022-02-12T04:54:02Z20210556-2821http://hdl.handle.net/10183/235117001132390A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137  fb−1. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.application/pdfengPhysical Review. D, Particles and fields. Woodbury. Vol. 104, no. 5 (Sept. 2021), 052001, 46 p.Aceleradores de partículasColisões proton-protonSupersimetriasSearch for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeVEstrangeiroinfo: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:UFRGSTEXT001132390.pdf.txt001132390.pdf.txtExtracted Texttext/plain208568http://www.lume.ufrgs.br/bitstream/10183/235117/2/001132390.pdf.txt1ed7ed2ce6b277bc836330535c0f5989MD52ORIGINAL001132390.pdfTexto completo (inglês)application/pdf2394238http://www.lume.ufrgs.br/bitstream/10183/235117/1/001132390.pdfd7575d9edc155402dab76bbe682bbdfeMD5110183/2351172023-07-22 03:41:58.652605oai:www.lume.ufrgs.br:10183/235117Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:41:58Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
title Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
spellingShingle Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
Sirunyan, A. M.
Aceleradores de partículas
Colisões proton-proton
Supersimetrias
title_short Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
title_full Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
title_fullStr Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
title_full_unstemmed Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
title_sort Search for top squark production in fully hadronic final states in proton-proton collisions at √s = 13  TeV
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
Supersimetrias
topic Aceleradores de partículas
Colisões proton-proton
Supersimetrias
description A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137  fb−1. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.
publishDate 2021
dc.date.issued.fl_str_mv 2021
dc.date.accessioned.fl_str_mv 2022-02-12T04:54:02Z
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dc.identifier.issn.pt_BR.fl_str_mv 0556-2821
dc.identifier.nrb.pt_BR.fl_str_mv 001132390
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dc.relation.ispartof.pt_BR.fl_str_mv Physical Review. D, Particles and fields. Woodbury. Vol. 104, no. 5 (Sept. 2021), 052001, 46 p.
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