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Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV
A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The data sample consists of $138~\mathrm{fb}^{-1}$ of proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$, recorded at the LHC in 2016--2018. A novel technique, using...
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2022
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Acceso en línea: | http://cds.cern.ch/record/2839046 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The data sample consists of $138~\mathrm{fb}^{-1}$ of proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$, recorded at the LHC in 2016--2018. A novel technique, using trackless and delayed jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or $\mathrm{Z}$ boson. This search is most sensitive to neutralino proper decay lengths of $\approx$1 $\mathrm{m}$, for which neutralino masses from up to 1180 $\mathrm{GeV}$ are excluded at $95\%$ confidence level. |
id | cern-2839046 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2022 |
record_format | invenio |
spelling | cern-28390462022-12-14T07:35:35Zhttp://cds.cern.ch/record/2839046CMS CollaborationSearch for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeVParticle Physics - ExperimentA search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The data sample consists of $138~\mathrm{fb}^{-1}$ of proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$, recorded at the LHC in 2016--2018. A novel technique, using trackless and delayed jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or $\mathrm{Z}$ boson. This search is most sensitive to neutralino proper decay lengths of $\approx$1 $\mathrm{m}$, for which neutralino masses from up to 1180 $\mathrm{GeV}$ are excluded at $95\%$ confidence level.CMS-PAS-EXO-21-014oai:cds.cern.ch:28390462022 |
spellingShingle | Particle Physics - Experiment CMS Collaboration Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV |
title | Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV |
title_full | Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV |
title_fullStr | Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV |
title_full_unstemmed | Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV |
title_short | Search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 TeV |
title_sort | search for long-lived particles in pp colision events with delayed trackless jets at sqrt(s) = 13 tev |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2839046 |
work_keys_str_mv | AT cmscollaboration searchforlonglivedparticlesinppcolisioneventswithdelayedtracklessjetsatsqrts13tev |