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@PHDTHESIS{Lehtinen:415433,
      author       = {Lehtinen, Suvi-Leena},
      othercontributors = {List, Jenny and Sander, Christian},
      title        = {{S}upersymmetry parameter determination at the
                      {I}nternational {L}inear {C}ollider},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2018-04509, DESY-THESIS-2018-035},
      series       = {DESY-THESIS},
      pages        = {279},
      year         = {2018},
      note         = {Dissertation, Universität Hamburg, 2018},
      abstract     = {In this thesis, the prospects for determining supersymmetry
                      parameters from observationsof supersymmetric particles at
                      the International Linear Collider (ILC) areinvestigated.
                      Supersymmetry (SUSY) has been proposed in order to solve
                      gaps inthe Standard Model of particle physics, among them
                      the hierarchy problem and theunexplained dark matter content
                      in the universe. There are many free parameters
                      insupersymmetry, whose values give rise to the properties of
                      the supersymmetric particleswhich can be searched for by
                      experiments. While the Large Hadron Collider (LHC)has
                      successfully excluded many possible scenarios, regions of
                      parameter space remainunexplored, especially where the
                      supersymmetric particles decay with little visible
                      energy.For example, models with light higgsinos or scalar
                      tau coannihilation can escapedetection at the LHC. These
                      kinds of scenarios could be discovered or excluded by
                      theproposed ILC, which would collide polarised electron and
                      positron beams at the centreof-mass energy of 500 GeV. The
                      advantages of this machine over the LHC, namely itsthe clean
                      experimental environment and triggerless detector operation,
                      would allow forthe discovery of almost any particle within
                      its kinematic reach.If supersymmetric discoveries were made
                      at the ILC, it would be possible to measurethe properties of
                      the SUSY particles very precisely. These measurements enable
                      determiningsome of the underlying SUSY parameters via tting
                      the parameters to theSUSY observations. In this thesis, a
                      10-parameter or 13-parameter phenomenologicalMinimal
                      Supersymmetric Standard Model and high-scale 4-6-parameter
                      models(CMSSM, NUHM1 and NUHM2) are tted to sets of possible
                      observations from theILC. Two types of scenarios are
                      considered: light higgsinos motivated by naturalness,and
                      scalar tau coannihilation motivated by the dark matter relic
                      density. It is shownthat the precision measurements of the
                      SUSY and Higgs sectors allow for determiningsome of the SUSY
                      parameters. Additionally, strong predictions for unobserved
                      heavyparticle masses can be made, leading to guidance on
                      future high-energy particle colliders.Furthermore, it is
                      possible under certain circumstances to check whether
                      theobserved particles explain the dark matter relic density.
                      It is shown that the permilleor percent-level measurements
                      from the International Large Detector are crucial formaking
                      these predictions. Additionally, the determined parameters
                      in the weak scalets are evolved to the GUT scale to test the
                      gaugino mass unication hypothesis. Theresults give a strong
                      argument for building an electron-positron collider to close
                      thegaps in the LHC searches or to study any particles that
                      the latter nds.},
      cin          = {FLC},
      cid          = {I:(DE-H253)FLC-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611) / DFG
                      project 13245592 - SFB 676: Teilchen, Strings und frühes
                      Universum: Struktur von Materie und Raum-Zeit (13245592) /
                      PHGS, VH-GS-500 - PIER Helmholtz Graduate School
                      $(2015_IFV-VH-GS-500)$},
      pid          = {G:(DE-HGF)POF3-611 / G:(GEPRIS)13245592 /
                      $G:(DE-HGF)2015_IFV-VH-GS-500$},
      experiment   = {EXP:(DE-H253)ILC(machine)-20150101},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2018-04509},
      url          = {https://bib-pubdb1.desy.de/record/415433},
}