Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV
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Publication Date: | 2021 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UFRGS |
Download full: | http://hdl.handle.net/10183/218933 |
Summary: | A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from bquarks, and missing transverse momentum. The search uses data from proton-proton collisions at √s=13TeV collected with the CMS detector, corresponding to an integrated luminosity of 137fb−1. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 95% confidence level on the masses of the top squark and the neutralino up to 925 and 450GeV, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850GeV for neutralino masses below 420GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4TeV and 900GeV respectively for the top squark and the lightest neutralino. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2021-03-16T04:26:57Z20211434-6044http://hdl.handle.net/10183/218933001122935A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from bquarks, and missing transverse momentum. The search uses data from proton-proton collisions at √s=13TeV collected with the CMS detector, corresponding to an integrated luminosity of 137fb−1. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 95% confidence level on the masses of the top squark and the neutralino up to 925 and 450GeV, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850GeV for neutralino masses below 420GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4TeV and 900GeV respectively for the top squark and the lightest neutralino.application/pdfengThe European physical journal. C, Particles and fields. Berlin. Vol. 81, no. 1 (Jan. 2021), 3, 30 p.Aceleradores de partículasColisões proton-protonDileptonsSearch for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeVEstrangeiroinfo: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:UFRGSTEXT001122935.pdf.txt001122935.pdf.txtExtracted Texttext/plain120753http://www.lume.ufrgs.br/bitstream/10183/218933/2/001122935.pdf.txtd54e67cbf9e9ac14b18113d1b5fa2541MD52ORIGINAL001122935.pdfTexto completo (inglês)application/pdf1936031http://www.lume.ufrgs.br/bitstream/10183/218933/1/001122935.pdfade06b1974b0be1539a085d787204f27MD5110183/2189332023-07-22 03:41:51.545772oai:www.lume.ufrgs.br:10183/218933Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:41:51Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
title |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
spellingShingle |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton Dileptons |
title_short |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
title_full |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
title_fullStr |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
title_full_unstemmed |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
title_sort |
Search for top squark pair production using dilepton final states in pp collision data collected at √ s = 13TeV |
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 Dileptons |
topic |
Aceleradores de partículas Colisões proton-proton Dileptons |
description |
A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from bquarks, and missing transverse momentum. The search uses data from proton-proton collisions at √s=13TeV collected with the CMS detector, corresponding to an integrated luminosity of 137fb−1. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 95% confidence level on the masses of the top squark and the neutralino up to 925 and 450GeV, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850GeV for neutralino masses below 420GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4TeV and 900GeV respectively for the top squark and the lightest neutralino. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-03-16T04:26:57Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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1434-6044 |
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001122935 |
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http://hdl.handle.net/10183/218933 |
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eng |
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The European physical journal. C, Particles and fields. Berlin. Vol. 81, no. 1 (Jan. 2021), 3, 30 p. |
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