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@PHDTHESIS{Niedziela:409652,
      author       = {Niedziela, Marek},
      othercontributors = {Sander, Christian},
      title        = {{P}recise jet measurements and search for supersymmetric
                      particles with the {CMS} experiment},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2018-03497, DESY-THESIS-2018-026},
      series       = {DESY-THESIS},
      pages        = {175},
      year         = {2018},
      note         = {Dissertation, Universität Hamburg, 2018},
      abstract     = {Searches for physics beyond Standard Model (SM) are one of
                      the main goals of the CMSexperiment at the Large Hadron
                      Collider (LHC). Among the investigated theories is
                      Supersymmetry(SUSY), which would manifest in a production of
                      new particles. As theLHC is a hadron collider, it is
                      expected that colored SUSY particles would be producedin
                      abundance if they were light enough. The decays of these new
                      particles would manifestin a production of jets. A good
                      understanding of the properties of the jets is crucial
                      tointerpret searches targeting such scenarios.In this
                      thesis, the measurement of the jet energy resolution in data
                      and in simulation,and a search for supersymmetry in multijet
                      events with missing transverse momentum arepresented.The
                      measurement of the jet energy resolution was performed on
                      data collected at thecenter of mass energy ofps = 13 TeV at
                      the CMS experiment in 2016. The methodemployed uses the
                      balance of the transverse momentum in dijet events to
                      compute thedata to simulation ratios of the jet energy
                      resolution, which are used as a correction factorin
                      simulation. Furthermore, similar scale factors are
                      calculated for the non-gaussian partof the jet response.A
                      search for supersymmetry in events with jets and missing
                      transverse momentum is performedon the same data as the
                      measurement of the jet energy resolution. The main focusof
                      the work presented in this thesis was the estimation of the
                      background arising fromQCD multijet events. The method, that
                      was used, called rebalance and smear, predictsthe QCD
                      contribution to the SM backgrounds based on a jet resolution
                      model.The observed number of events agree with the Standard
                      Model background predictionsand no evidence for
                      supersymmetry has been observed. The upper limit on the
                      productioncross sections and exclusion curves for SUSY
                      particles for dierent simplied models(SMs) are calculated.
                      The production of gluinos with masses in a range of
                      1800-1960 GeVwere excluded for masses of the lightest
                      supersymmetric particle (LSP)up to values of 1TeV for
                      dierent simplied models at $95\%$ condence level. The top,
                      bottom and lightsquarks with masses below 960, 1050 and 1450
                      GeV, respectively, were also excluded formasses of LSP below
                      400 GeV for the considered simplied models.},
      cin          = {UNI/EXP},
      cid          = {$I:(DE-H253)UNI_EXP-20120731$},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29 / PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2018-03497},
      url          = {https://bib-pubdb1.desy.de/record/409652},
}