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SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV

This PhD thesis presents a search for pair production of supersymmetric particles in events with two oppositely charged leptons (electrons or muons) and missing transverse momentum. The data sample corresponds to an integrated luminosity of 35.9 fb −1 of proton-proton collisions at √s = 13 TeV colle...

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Detalles Bibliográficos
Autor principal: Chazin Quero, Barbara
Lenguaje:eng
Publicado: 2020
Materias:
Acceso en línea:http://cds.cern.ch/record/2709984
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author Chazin Quero, Barbara
author_facet Chazin Quero, Barbara
author_sort Chazin Quero, Barbara
collection CERN
description This PhD thesis presents a search for pair production of supersymmetric particles in events with two oppositely charged leptons (electrons or muons) and missing transverse momentum. The data sample corresponds to an integrated luminosity of 35.9 fb −1 of proton-proton collisions at √s = 13 TeV collected with the CMS detector during the 2016 data taking period at the LHC. No significant deviation is observed from the predicted standard model background. The results are interpreted in terms of several simplified models for chargino and top squark pair production, assuming R-parity conservation and with the neutralino as the lightest supersymmetric particle. When the chargino is assumed to undergo a cascade decay through sleptons, with a slepton mass equal to the average of the chargino and neutralino masses, exclusion limits at 95% confidence level are set on the masses of the chargino and neutralino up to 800 and 320 GeV, respectively. For top squark pair production, the search focuses on models with a small mass difference between the top squark and the lightest neutralino. When the top squark decays into an off-shell top quark and a neutralino, the limits extend up to 420 and 360 GeV for the top squark and neutralino masses, respectively. Keywords: Hadron-Hadron scattering (experiments), Supersymmetry, 13 TeV, CMS
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
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spelling cern-27099842020-03-02T22:27:35Zhttp://cds.cern.ch/record/2709984engChazin Quero, BarbaraSEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeVParticle Physics - ExperimentThis PhD thesis presents a search for pair production of supersymmetric particles in events with two oppositely charged leptons (electrons or muons) and missing transverse momentum. The data sample corresponds to an integrated luminosity of 35.9 fb −1 of proton-proton collisions at √s = 13 TeV collected with the CMS detector during the 2016 data taking period at the LHC. No significant deviation is observed from the predicted standard model background. The results are interpreted in terms of several simplified models for chargino and top squark pair production, assuming R-parity conservation and with the neutralino as the lightest supersymmetric particle. When the chargino is assumed to undergo a cascade decay through sleptons, with a slepton mass equal to the average of the chargino and neutralino masses, exclusion limits at 95% confidence level are set on the masses of the chargino and neutralino up to 800 and 320 GeV, respectively. For top squark pair production, the search focuses on models with a small mass difference between the top squark and the lightest neutralino. When the top squark decays into an off-shell top quark and a neutralino, the limits extend up to 420 and 360 GeV for the top squark and neutralino masses, respectively. Keywords: Hadron-Hadron scattering (experiments), Supersymmetry, 13 TeV, CMSCERN-THESIS-2019-290oai:cds.cern.ch:27099842020-02-17T18:31:14Z
spellingShingle Particle Physics - Experiment
Chazin Quero, Barbara
SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV
title SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV
title_full SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV
title_fullStr SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV
title_full_unstemmed SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV
title_short SEARCHES FOR PAIR PRODUCTION OF CHARGINOS AND TOP SQUARKS IN FINAL STATES WITH TWO OPPOSITELY CHARGED LEPTONS IN PROTON-PROTON COLLISIONS AT √ s = 13 TeV
title_sort searches for pair production of charginos and top squarks in final states with two oppositely charged leptons in proton-proton collisions at √ s = 13 tev
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2709984
work_keys_str_mv AT chazinquerobarbara searchesforpairproductionofcharginosandtopsquarksinfinalstateswithtwooppositelychargedleptonsinprotonprotoncollisionsats13tev