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@PHDTHESIS{Soldin:969334,
      author       = {Soldin, Philipp},
      othercontributors = {Wiebusch, Christopher and Stahl, Achim},
      title        = {{I}mprovements in the measurement of the neutrino mixing
                      angle $θ_{13}$ with the {D}ouble {C}hooz experiment},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {RWTH Aachen University},
      reportid     = {RWTH-2023-09118},
      pages        = {1 Online-Ressource : Illustrationen, Diagramme},
      year         = {2023},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University; Dissertation, RWTH Aachen University, 2023},
      abstract     = {Double Chooz is a reactor neutrino disappearance experiment
                      that was operating between 2011 until the beginning of 2018.
                      Its primary purpose was the precise measurement of the
                      neutrino mixing angle $\theta_{13}$, or more precisely, the
                      neutrino mixing amplitude $\sin^{2}(2\theta_{13})$. The
                      experimental setup consisted of two identical liquid
                      scintillator detectors at average baselines of about 400m
                      and 1km to two nuclear reactor cores in Chooz, France. The
                      neutrinos were detected by measuring the inverse beta decay
                      (IBD) signature, which consists of prompt positron
                      annihilation and delayed neutron capture signals. Using the
                      rate and spectral energy shape of the measured neutrinos and
                      taking into account all relevant background contributions,
                      the neutrino mixing amplitude $\sin^{2}(2\theta_{13})$ can
                      be obtained. This thesis describes the implementation of a
                      software framework that realizes all these aspects
                      efficiently and performantly in a Poisson -based Likelihood
                      fit. The analysis is checked thoroughly for self-consistency
                      and is cross-validated to ensure an unbiased reconstruction
                      result. Using a spectral energy modeling technique to
                      incorporate deviations from the initially assumed reactor
                      neutrino energy spectrum allows for an adaptation and
                      extraction of these deviations across multiple data sets.
                      The presented analysis gives an estimate for the neutrino
                      mixing amplitude of $\sin^{2}(2\theta_{13}) = 0.1036
                      ^{+0.0117}_{-0.0118}$. It is also shown how the reactor
                      neutrino energy spectra can be efficiently split to
                      incorporate the runtime of each nuclear reactor. This change
                      allows an improved estimate of
                      $\sin^{2}(2\theta_{13})_{\text{Reactor Split}} =
                      0.0960_{-0.0105}^{+0.0102}$ with a 13\\% improvement
                      uncertainty. All the fit results are compatible with
                      previous results from the Double Chooz collaboration.},
      cin          = {133510 / 130000},
      ddc          = {530},
      cid          = {$I:(DE-82)133510_20140620$ / $I:(DE-82)130000_20140620$},
      pnm          = {DFG project 39031316 - Bestimmung des leptonischen
                      Mischungswinkels Theta-13 mit dem Double-Chooz Experiment
                      (39031316)},
      pid          = {G:(GEPRIS)39031316},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2023-09118},
      url          = {https://publications.rwth-aachen.de/record/969334},
}