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Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment

An interpretation of CMS searches for evidence of supersymmetry in the context of the minimal supersymmetric Standard Model (MSSM) is given. It is found that supersymmet- ric particles with color charge are excluded in the mass range below about 400 GeV, but neutral and weakly-charged sparticles rem...

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Autor principal: Bein, Samuel Louis
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:http://cds.cern.ch/record/2683365
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author Bein, Samuel Louis
author_facet Bein, Samuel Louis
author_sort Bein, Samuel Louis
collection CERN
description An interpretation of CMS searches for evidence of supersymmetry in the context of the minimal supersymmetric Standard Model (MSSM) is given. It is found that supersymmet- ric particles with color charge are excluded in the mass range below about 400 GeV, but neutral and weakly-charged sparticles remain non-excluded in all mass ranges. Discussion of the non-excluded regions of the model parameter space is given, including details on the strengths and weaknesses of existing searches, and recommendations for future analysis strategies. Advancements in the modeling of events arising from quantum chromodynamics and electroweak boson production, which are major backgrounds in searches for new physics at the LHC, are also presented. These methods have been implemented as components of CMS searches for supersymmetry in proton-proton collisions resulting in purely hadronic events (i.e., events with no identiőed leptons) at a center of momentum energy of 13 TeV. These searches, interpreted in the context of simpliőed models, exclude supersymmetric glu- ons (gluinos) up to masses of 1400 to 1600 GeV, depending on the model considered, and exclude scalar top quarks with masses up to about 800 GeV, assuming a massless lightest su- persymmetric particle. A search for non-excluded supersymmetry models is also presented, which uses multivariate discriminants to isolate potential signal candidate events. The search achieves sensitivity to new physics models in background-dominated kinematic regions not typically considered by analyses, and rules out supersymmetry models that survived 7 and 8 TeV searches performed by CMS.
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spelling cern-26833652019-09-30T06:29:59Zhttp://cds.cern.ch/record/2683365engBein, Samuel LouisTargeting the Minimal Supersymmetric Standard Model with the CMS ExperimentDetectors and Experimental TechniquesAn interpretation of CMS searches for evidence of supersymmetry in the context of the minimal supersymmetric Standard Model (MSSM) is given. It is found that supersymmet- ric particles with color charge are excluded in the mass range below about 400 GeV, but neutral and weakly-charged sparticles remain non-excluded in all mass ranges. Discussion of the non-excluded regions of the model parameter space is given, including details on the strengths and weaknesses of existing searches, and recommendations for future analysis strategies. Advancements in the modeling of events arising from quantum chromodynamics and electroweak boson production, which are major backgrounds in searches for new physics at the LHC, are also presented. These methods have been implemented as components of CMS searches for supersymmetry in proton-proton collisions resulting in purely hadronic events (i.e., events with no identiőed leptons) at a center of momentum energy of 13 TeV. These searches, interpreted in the context of simpliőed models, exclude supersymmetric glu- ons (gluinos) up to masses of 1400 to 1600 GeV, depending on the model considered, and exclude scalar top quarks with masses up to about 800 GeV, assuming a massless lightest su- persymmetric particle. A search for non-excluded supersymmetry models is also presented, which uses multivariate discriminants to isolate potential signal candidate events. The search achieves sensitivity to new physics models in background-dominated kinematic regions not typically considered by analyses, and rules out supersymmetry models that survived 7 and 8 TeV searches performed by CMS.CMS-TS-2019-011CERN-THESIS-2016-427oai:cds.cern.ch:26833652016
spellingShingle Detectors and Experimental Techniques
Bein, Samuel Louis
Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment
title Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment
title_full Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment
title_fullStr Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment
title_full_unstemmed Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment
title_short Targeting the Minimal Supersymmetric Standard Model with the CMS Experiment
title_sort targeting the minimal supersymmetric standard model with the cms experiment
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/2683365
work_keys_str_mv AT beinsamuellouis targetingtheminimalsupersymmetricstandardmodelwiththecmsexperiment