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@PHDTHESIS{Leuermann:751704,
      author       = {Leuermann, Martin},
      othercontributors = {Wiebusch, Christopher and Krämer, Michael},
      title        = {{T}esting the neutrino mass ordering with {I}ce{C}ube
                      {D}eep{C}ore},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Aachen},
      reportid     = {RWTH-2018-231554},
      pages        = {1 Online-Ressource (xi, 177 Seiten) : Illustrationen},
      year         = {2018},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University 2019; Dissertation, RWTH Aachen University, 2018},
      abstract     = {The Neutrino Mass Ordering (NMO) describes the energetic
                      ordering of the three neutrino masses m1, m2 and m3. Today,
                      the ordering is constrained up to the question of m3 being
                      the heaviest or the lightest of all neutrino masses, which
                      is commonly called Normal (NO) and Inverted Ordering (IO),
                      respectively. One way to determine the NMO is to measure
                      matter effects in the oscillation pattern of atmospheric
                      neutrinos. In this work, an analysis of three years of
                      DeepCore data is presented to test the Neutrino Mass
                      Ordering. To do this, a new event reconstruction was
                      developed in this work, which provides excellent resolutions
                      in neutrino energy and zenith-angle at the lowest energies.
                      The Neutrino Mass Ordering is fit in a maximum-likelihood
                      method, which includes systematic uncertainties in the
                      atmospheric fluxes, the oscillation parameters, the detector
                      response and the neutrino-nucleon interactions as nuisance
                      parameters in the likelihood fit. In experimental data, a
                      preference for Normal over Inverted Ordering is found with
                      p-values of $71.1\%$ for NO (CLs = $83.0\%)$ and $15.2\%$
                      for IO (CLs = $53.3\%).$ This is inline with recent
                      observations of the NOvA, T2K and Super-Kamiokande
                      experiments. Moreover, the fit prefers matter effects (MA)
                      over vacuum oscillations (VA) in case of both ordering
                      hypotheses. Besides the experimental result, this work
                      provides a proof-of-concept for an analysis of the Neutrino
                      Mass Ordering with a future low-energy extension of IceCube,
                      such as PINGU. It tests the full analysis-chain, including
                      the statistical interpretation of the experimental result
                      and the understanding of systematic uncertainties. Thus, it
                      provides a benchmark analysis for these more sensitive
                      future measurements.},
      cin          = {133510 / 130000},
      ddc          = {530},
      cid          = {$I:(DE-82)133510_20140620$ / $I:(DE-82)130000_20140620$},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2018-231554},
      url          = {https://publications.rwth-aachen.de/record/751704},
}