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@PHDTHESIS{SabaterIglesias:473208,
      author       = {Sabater Iglesias, Jorge},
      othercontributors = {Heinemann, Beate and Meloni, Federico},
      title        = {{W}elcome to {T}win {P}articles: {F}rom {N}ovel {ZZ}
                      {E}stimate to {S}earches for {S}upersymmetric {S}leptons and
                      {H}iggsinos using the {ATLAS} {R}un-2 {D}ata and at the
                      {H}igh-{L}uminosity {LHC}},
      school       = {Albert Ludwig University of Freiburg},
      type         = {Dissertation},
      publisher    = {Albert-Ludwigs-Universität Freiburg},
      reportid     = {PUBDB-2021-05547, CERN-THESIS-2021-239},
      series       = {Welcome to Twin Particles: From Novel ZZ Estimate to
                      Searches for Supersymmetric Sleptons and Higgsinos using the
                      ATLAS Run-2 Data and at the High-Luminosity LHC},
      pages        = {227},
      year         = {2021},
      note         = {Dissertation, Albert Ludwig University of Freiburg, 2021},
      abstract     = {After the Higgs boson discovery by the ATLAS and CMS
                      collaborations at CERN, one of the main goals of the Large
                      Hadron Collider programme is to find Beyond the Standard
                      Model particles. This thesis focuses on the search for
                      supersymmetric partners of the leptons (sleptons) and
                      presents the prospects of a search for the supersymmetric
                      partners of the electroweak gauge bosons and the Higgs boson
                      (higgsinos). The detectable final state for both signatures
                      consists of two electrons or muons with opposite electric
                      charge. The search for the sleptons is performed using the
                      full Run-2 data collected by the ATLAS detector,
                      corresponding to an integrated luminosity of
                      $139~\text{fb}^{-1}$ at $\sqrt{s} = 13~\text{TeV}$. In the
                      regions sensitive to the slepton signal, the selected events
                      are found to be consistent with the Standard Model
                      predictions. The higgsino search is developed in the context
                      of the next major upgrade of the LHC, the High-Luminosity
                      LHC (HL-LHC). The thesis assesses the sensitivity reach on
                      the search for higgsinos by the end of the HL-LHC era, by
                      which the ATLAS detector is expected to have recorded an
                      integrated luminosity of $3000~\text{fb}^{-1}$ at $\sqrt{s}
                      = 14~\text{TeV}$. The results obtained show that using the
                      full HL-LHC dataset, higgsinos with masses of about
                      $200~\text{GeV}$ could be discovered, and masses up to
                      $350~\text{GeV}$ could be excluded. The thesis also
                      discusses the possibility of estimating the Standard Model
                      $ZZ$ process using $Z\gamma$ events from data in Beyond the
                      Standard Model searches, showing that theoretical
                      uncertainties of about $4\\%$ can be achieved. In addition
                      to the LHC data analyses, the thesis reports on the design
                      of a cooling setup with the aim of testing the silicon
                      modules that will be placed in the upgraded ATLAS Inner
                      Detector.},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / PHGS,
                      VH-GS-500 - PIER Helmholtz Graduate School
                      $(2015_IFV-VH-GS-500)$},
      pid          = {G:(DE-HGF)POF4-611 / $G:(DE-HGF)2015_IFV-VH-GS-500$},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:bsz:25-freidok-2233212},
      doi          = {10.3204/PUBDB-2021-05547},
      url          = {https://bib-pubdb1.desy.de/record/473208},
}