Search for disappearing tracks in proton-proton collisions at √s=13 TeV

Detalhes bibliográficos
Autor(a) principal: Sirunyan, A. M.
Data de Publicação: 2020
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/10183/217290
Resumo: A search is presented for long-lived charged particles that decay within the volume of the silicon tracker of the CMS experiment. Such particles can produce events with an isolated track that is missing hits in the outermost layers of the silicon tracker, and is also associated with little energy deposited in the calorimeters and no hits in the muon detectors. The search for events with this “disappearing track” signature is performed in a sample of proton-proton collisions recorded by the CMS experiment at the LHC with a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 101 fb−1recorded in 2017 and 2018. The observation of 48 events is consistent with the estimated background of 47.8+2.7−2.3(stat)±8.1 (syst) events. Upper limits are set on chargino production in the context of an anomaly-mediated supersymmetry breaking model for purely wino and higgsino neutralino scenarios. At 95% confidence level, the first constraint is placed on chargino masses in the higgsino case, excluding below 750 (175) GeV for a lifetime of 3 (0.05) ns. In the wino case, the results of this search are combined with a previous CMS search to produce a result representing the complete LHC data set recorded in 2015–2018, the most stringent constraints to date. At 95% confidence level, chargino masses in the wino case are excluded below 884 (474) GeV for a lifetime of 3 (0.2) ns.
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spelling Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2021-01-14T04:10:32Z20200370-2693http://hdl.handle.net/10183/217290001120421A search is presented for long-lived charged particles that decay within the volume of the silicon tracker of the CMS experiment. Such particles can produce events with an isolated track that is missing hits in the outermost layers of the silicon tracker, and is also associated with little energy deposited in the calorimeters and no hits in the muon detectors. The search for events with this “disappearing track” signature is performed in a sample of proton-proton collisions recorded by the CMS experiment at the LHC with a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 101 fb−1recorded in 2017 and 2018. The observation of 48 events is consistent with the estimated background of 47.8+2.7−2.3(stat)±8.1 (syst) events. Upper limits are set on chargino production in the context of an anomaly-mediated supersymmetry breaking model for purely wino and higgsino neutralino scenarios. At 95% confidence level, the first constraint is placed on chargino masses in the higgsino case, excluding below 750 (175) GeV for a lifetime of 3 (0.05) ns. In the wino case, the results of this search are combined with a previous CMS search to produce a result representing the complete LHC data set recorded in 2015–2018, the most stringent constraints to date. At 95% confidence level, chargino masses in the wino case are excluded below 884 (474) GeV for a lifetime of 3 (0.2) ns.application/pdfengPhysics letters. B. Amsterdam. Vol. 806 (July 2020), 135502, 27 p.Aceleradores de partículasColisões proton-protonSupersimetriasCMSPhysicsDisappearing tracksSearch for disappearing tracks 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:UFRGSTEXT001120421.pdf.txt001120421.pdf.txtExtracted Texttext/plain112508http://www.lume.ufrgs.br/bitstream/10183/217290/2/001120421.pdf.txt4d8628b122c011a8cabe9b51673b7f01MD52ORIGINAL001120421.pdfTexto completo (inglês)application/pdf751820http://www.lume.ufrgs.br/bitstream/10183/217290/1/001120421.pdfbe6e4774fe66d4d6efb3f6a88d95f9a2MD5110183/2172902023-07-22 03:40:26.695239oai:www.lume.ufrgs.br:10183/217290Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:40:26Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Search for disappearing tracks in proton-proton collisions at √s=13 TeV
title Search for disappearing tracks in proton-proton collisions at √s=13 TeV
spellingShingle Search for disappearing tracks in proton-proton collisions at √s=13 TeV
Sirunyan, A. M.
Aceleradores de partículas
Colisões proton-proton
Supersimetrias
CMS
Physics
Disappearing tracks
title_short Search for disappearing tracks in proton-proton collisions at √s=13 TeV
title_full Search for disappearing tracks in proton-proton collisions at √s=13 TeV
title_fullStr Search for disappearing tracks in proton-proton collisions at √s=13 TeV
title_full_unstemmed Search for disappearing tracks in proton-proton collisions at √s=13 TeV
title_sort Search for disappearing tracks 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
CMS
Physics
Disappearing tracks
dc.subject.eng.fl_str_mv CMS
Physics
Disappearing tracks
description A search is presented for long-lived charged particles that decay within the volume of the silicon tracker of the CMS experiment. Such particles can produce events with an isolated track that is missing hits in the outermost layers of the silicon tracker, and is also associated with little energy deposited in the calorimeters and no hits in the muon detectors. The search for events with this “disappearing track” signature is performed in a sample of proton-proton collisions recorded by the CMS experiment at the LHC with a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 101 fb−1recorded in 2017 and 2018. The observation of 48 events is consistent with the estimated background of 47.8+2.7−2.3(stat)±8.1 (syst) events. Upper limits are set on chargino production in the context of an anomaly-mediated supersymmetry breaking model for purely wino and higgsino neutralino scenarios. At 95% confidence level, the first constraint is placed on chargino masses in the higgsino case, excluding below 750 (175) GeV for a lifetime of 3 (0.05) ns. In the wino case, the results of this search are combined with a previous CMS search to produce a result representing the complete LHC data set recorded in 2015–2018, the most stringent constraints to date. At 95% confidence level, chargino masses in the wino case are excluded below 884 (474) GeV for a lifetime of 3 (0.2) ns.
publishDate 2020
dc.date.issued.fl_str_mv 2020
dc.date.accessioned.fl_str_mv 2021-01-14T04:10:32Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/217290
dc.identifier.issn.pt_BR.fl_str_mv 0370-2693
dc.identifier.nrb.pt_BR.fl_str_mv 001120421
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Physics letters. B. Amsterdam. Vol. 806 (July 2020), 135502, 27 p.
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