Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autor principal: CMS Collaboration
Publicado: 2022
Materias:
Acceso en línea:http://cds.cern.ch/record/2839046
_version_ 1780975949774323712
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