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@ARTICLE{Fischer:479234,
      author       = {Fischer, Moritz S. and Brüggen, Marcus and Schmidt-Hoberg,
                      Kai and Dolag, Klaus and Kahlhoefer, Felix and Ragagnin,
                      Antonio and Robertson, Andrew},
      title        = {{C}osmological simulations with rare and frequent dark
                      matter self-interactions},
      journal      = {Monthly notices of the Royal Astronomical Society},
      volume       = {516},
      number       = {2},
      issn         = {0035-8711},
      address      = {Oxford},
      publisher    = {Oxford Univ. Press},
      reportid     = {PUBDB-2022-02948, arXiv:2205.02243. DESY-22-072},
      pages        = {1923 - 1940},
      year         = {2022},
      note         = {13 pages, 16 figures + appendices, accepted for publication
                      in MNRAS © 2022 The Author(s) Published by Oxford
                      University Press on behalf of Royal Astronomical Society},
      abstract     = {Dark matter (DM) with self-interactions is a promising
                      solution for the small-scale problems of the standard
                      cosmological model. Here we perform the first cosmological
                      simulation of frequent DM self-interactions, corresponding
                      to small-angle DM scatterings. The focus of our analysis
                      lies in finding and understanding differences to the
                      traditionally assumed rare DM (large-angle)
                      self-scatterings. For this purpose, we compute the
                      distribution of DM densities, the matter power spectrum, the
                      two-point correlation function, and the halo and subhalo
                      mass functions. Furthermore, we investigate the density
                      profiles of the DM haloes and their shapes. We find that
                      overall large-angle and small-angle scatterings behave
                      fairly similarly with a few exceptions. In particular, the
                      number of satellites is considerably suppressed for frequent
                      compared to rare self-interactions with the same
                      cross-section. Overall, we observe that while differences
                      between the two cases may be difficult to establish using a
                      single measure, the degeneracy may be broken through a
                      combination of multiple ones. For instance, the combination
                      of satellite counts with halo density or shape profiles
                      could allow discriminating between rare and frequent
                      self-interactions. As a by-product of our analysis, we
                      provide – for the first time – upper limits on the
                      cross-section for frequent self-interactions.},
      keywords     = {dark matter: density (INSPIRE) / scattering: small-angle
                      (INSPIRE) / dark matter: halo (INSPIRE) / matter: power
                      spectrum (INSPIRE) / dark matter: scattering (INSPIRE) /
                      halo: density (INSPIRE) / satellite (INSPIRE) / wide-angle
                      (INSPIRE) / correlation function (INSPIRE) / suppression
                      (INSPIRE) / cosmological model (INSPIRE) / dark matter:
                      interaction (INSPIRE) / self-force (INSPIRE) / two-point
                      function (INSPIRE) / numerical calculations (INSPIRE) /
                      astroparticle physics (autogen) / methods: numerical
                      (autogen) / galaxies: haloes (autogen) / dark matter
                      (autogen)},
      cin          = {T},
      ddc          = {520},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / EXC
                      2121 - Das Quantisierte Universum (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2205.02243},
      howpublished = {arXiv:2205.02243},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2205.02243;\%\%$},
      UT           = {WOS:000851656200003},
      doi          = {10.1093/mnras/stac2207},
      url          = {https://bib-pubdb1.desy.de/record/479234},
}