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@PHDTHESIS{Vollmann:221451,
      author       = {Vollmann, Martin},
      title        = {{P}henomenology of {D}ark {M}atter from {R}adio to {G}amma
                      {R}ay {F}requencies},
      issn         = {1435-8085},
      school       = {Universität Hamburg},
      type         = {Dr.},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2015-02685, DESY-THESIS-2015-027},
      series       = {DESY-THESIS},
      pages        = {133},
      year         = {2015},
      note         = {Universität Hamburg, Diss., 2015},
      abstract     = {Multiwavelength astronomical observations have been proven
                      to be of crucial relevance in understanding the most
                      fundamental questions in physics. One of the biggest
                      mysteries of nature is the existence of a (still)
                      unidentified type of matter that makes up most of the
                      material universe. Although little is known about its
                      nature, it is very likely that this exotic Dark Matter (DM)
                      is made of so-called Weakly Interacting Massive
                      Particles(WIMPs).In this thesis we investigate which
                      strategies can best address the fundamental question: What
                      is Dark Matter? Specifically, by following the “WIMP”
                      paradigm as our guiding principle, we comprehensively
                      discuss the phenomenology of prospective “indirect”
                      detection scenarios of such WIMPs. Special consideration is
                      given to extraterrestrial gamma rays and radio waves
                      produced around the center of the Milky Way. In light of two
                      recently highly debated claims of WIMP Dark Matter
                      discovery, namely the 130 GeV gamma-ray line and the GeV
                      gamma-ray excess, we invoke ourmethods to confront those
                      hypotheses. In addition our study contains antiparticle
                      cosmic-ray (antiproton and positron) data analyses. The
                      phenomenology for indirect DM detection with these
                      “messengers” is briefly discussed as well.By exploiting
                      the high degree of symmetry of typical annihilating 2-WIMP
                      initial states, we are able to employ a very powerful tool
                      in theoretical particle physics: the generalized optical
                      theorem. This theorem relates the amplitude of
                      loop-suppressed processes, such as the 130 GeV line if
                      interpreted as product of WIMP annihilations, with
                      tree-level process which are constrained in the same way as
                      with the GeV excess. Unprecedentedly reported analytical
                      computations of partial-wave (and helicity) cross sections
                      with general applicability are calculated and applied.The
                      possibility that a non-trivial effect in the particle model
                      for DM might enhance the strength of a gamma-ray line signal
                      is also explored. We focus on the five-dimensional model
                      with “Universal Extra Dimensions” (UED) which offers a
                      suitable DM candidate. We show that the intrinsic resonant
                      properties of the model give rise to enhancements in the
                      annihilation cross sections. All the necessary couplings of
                      KK-number violating vertices localized in the orbifold fixed
                      points are also computed for the first time.Motivated by the
                      possibility that black holes can accelerate DM particles up
                      to, in principle, arbitrarily large energies, we investigate
                      WIMP annihilations with larger center-of-mass energies in
                      the UED context.},
      cin          = {UNI/TH},
      cid          = {$I:(DE-H253)UNI_TH-20120731$},
      pnm          = {613 - Matter and Radiation from the Universe (POF3-613)},
      pid          = {G:(DE-HGF)POF3-613},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)29 / PUB:(DE-HGF)11},
      doi          = {10.3204/DESY-THESIS-2015-027},
      url          = {https://bib-pubdb1.desy.de/record/221451},
}