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@ARTICLE{Ringwald:168903,
      author       = {Ringwald, Andreas},
      title        = {{S}earching for axions and {ALP}s from string theory},
      journal      = {Journal of physics / Conference Series},
      volume       = {485},
      issn         = {1742-6596},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {DESY-2014-02718, DESY-12-151},
      pages        = {012013},
      year         = {2014},
      abstract     = {We review searches for closed string axions and
                      axion–like particles (ALPs) in IIB string flux
                      compactifications. For natural values of the background
                      fluxes and TeV scale gravitino mass, the moduli
                      stabilisation mechanism of the LARGE Volume Scenario
                      predicts the existence of a QCD axion candidate with
                      intermediate scale decay constant, fa ~ 109÷12 GeV,
                      associated with the small cycles wrapped by the branes
                      hosting the visible sector, plus a nearly massless and
                      nearly decoupled ALP associated with the LARGE cycle. In
                      setups where the visible sector branes are wrapping more
                      than the minimum number of two intersecting cycles, there
                      are more ALPs which have approximately the same decay
                      constant and coupling to the photon as the QCD axion
                      candidate, but which are exponentially lighter. There are
                      exciting phenomenological opportunities to search for these
                      axions and ALPs in the near future. For fa ~ 1011÷12 GeV,
                      the QCD axion can be the dominant part of dark matter and be
                      detected in haloscopes exploiting microwave cavities. For fa
                      ~ 109÷10 GeV, the additional ALPs could explain
                      astrophysical anomalies and be searched for in the upcoming
                      generation of helioscopes and
                      light–shining–through–a–wall experiments.},
      month         = {Jun},
      date          = {2012-06-03},
      organization  = {18th International Symposium on
                       Particles, Strings and Cosmology,
                       Merida (Mexico), 3 Jun 2012 - 8 Jun
                       2012},
      keywords     = {quantum chromodynamics: axion (INSPIRE) / axion: string
                      (INSPIRE) / compactification (INSPIRE) / moduli: stability
                      (INSPIRE) / gravitino: mass (INSPIRE) / flux: string
                      (INSPIRE) / photon: regeneration (INSPIRE) / membrane model
                      (INSPIRE) / string model (INSPIRE)},
      cin          = {T / ALPS},
      ddc          = {530},
      cid          = {I:(DE-H253)T-20120731 / I:(DE-H253)ALPS-20130318},
      pnm          = {514 - Theoretical Particle Physics (POF2-514)},
      pid          = {G:(DE-HGF)POF2-514},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)15},
      doi          = {10.1088/1742-6596/485/1/012013},
      url          = {https://bib-pubdb1.desy.de/record/168903},
}