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@PHDTHESIS{Andres:999521,
      author       = {Andres, Achim},
      othercontributors = {Pretz, Jörg and Stahl, Achim},
      title        = {{T}he first direct measurement of the deuteron electric
                      dipole moment at the cooler synchrotron {COSY}},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {RWTH Aachen University},
      reportid     = {RWTH-2024-12160},
      pages        = {1 Online-Ressource : Illustrationen},
      year         = {2024},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University 2025; Dissertation, RWTH Aachen University, 2024},
      abstract     = {Currently, we do not understand why there is more matter
                      than antimatter in our universe. The matter-antimatter
                      asymmetry could only occur under specific conditions called
                      the Sakharov conditions, one of which involves the violation
                      of combined CP symmetry. Our understanding of the universe
                      is based on the preservation of quantities such as energy,
                      momentum, and charge. Advances in elementary particle
                      physics have led to the discovery of new symmetries,
                      including parity P, charge conjugation C, and time-reversal
                      T symmetries. Traditionally, these symmetries were believed
                      to be universal. However, over the past few decades, small
                      violations of C, P, and combined CP symmetries have been
                      detected and incorporated into the Standard Model of
                      particle physics and cosmology. Nonetheless, these
                      violations are insufficient to explain the observed
                      domination of matter over antimatter. Hence, the search for
                      additional CP-violating phenomena continues. A possible
                      manifestation of additional CP violation is the Electric
                      Dipole Moment (EDM) of elementary particles. The Standard
                      Model predicts a highly suppressed EDM, requiring
                      experiments with high statistical and systematic sensitivity
                      for detection. Conversely, models of physics beyond the
                      Standard Model predict significantly larger EDMs, making EDM
                      measurements an important tool for excluding certain beyond
                      Standard Model theories. To date, all measurements of EDMs
                      have been consistent with zero, providing only upper limits
                      on the EDM size of various particles. The EDM must be a
                      vectorial property aligned with a particle's spin, so
                      measurement techniques focus on detecting changes in spin
                      polarization signals caused by the interaction of a
                      potential EDM with electric fields. Because charged
                      particles are accelerated by electric fields, storage rings
                      are ideal for charged particle EDM experiments such as the
                      deuteron, for which no experimental limit is available so
                      far. The goal of this thesis is to perform the first direct
                      measurement of the deuteron Electric Dipole Moment at the
                      Cooler Synchrotron at Forschungszentrum Jülich by observing
                      the influence of the Electric Dipole Moment on the
                      polarization of a stored bunched and polarized deuteron
                      beam. The measured values presented in this thesis are
                      dominated by systematic errors, from which an upper limit of
                      the deuteron Electric Dipole Moment is derived: $|d^d|$ <
                      2.2e-16 e cm $(95\%$ C.L.)},
      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-2024-12160},
      url          = {https://publications.rwth-aachen.de/record/999521},
}