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@ARTICLE{Bringmann:616514,
      author       = {Bringmann, Torsten and Gonzalo, Tomás E. and Kahlhoefer,
                      Felix and Matuszak, Jonas and Tasillo, Carlo},
      title        = {{H}unting {WIMP}s with {LISA}: correlating dark matter and
                      gravitational wave signals},
      journal      = {Journal of cosmology and astroparticle physics},
      volume       = {2024},
      number       = {05},
      issn         = {1475-7516},
      address      = {London},
      publisher    = {IOP},
      reportid     = {PUBDB-2024-06427, arXiv:2311.06346. DESY-23-184. P3H-086.
                      TTP-055},
      pages        = {065},
      year         = {2024},
      note         = {29 pages, 12 figures + appendices},
      abstract     = {The thermal freeze-out mechanism in its classical form is
                      tightly connected to physicsbeyond the Standard Model around
                      the electroweak scale, which has been the target of
                      enormousexperimental efforts. In this work we study a dark
                      matter model in which freeze-out is triggeredby a strong
                      first-order phase transition in a dark sector, and show that
                      this phase transitionmust also happen close to the
                      electroweak scale, i.e. in the temperature range relevant
                      forgravitational wave searches with the LISA mission.
                      Specifically, we consider the spontaneousbreaking of a
                      U(1)′ gauge symmetry through the vacuum expectation value
                      of a scalar field,which generates the mass of a fermionic
                      dark matter candidate that subsequently annihilates intodark
                      Higgs and gauge bosons. In this set-up the peak frequency of
                      the gravitational wavebackground is tightly correlated with
                      the dark matter relic abundance, and imposing the
                      observedvalue for the latter implies that the former must
                      lie in the milli-Hertz range. A peculiar featureof our
                      set-up is that the dark sector is not necessarily in thermal
                      equilibrium with the StandardModel during the phase
                      transition, and hence the temperatures of the two sectors
                      evolveindependently. Nevertheless, the requirement that the
                      universe does not enter an extended periodof matter
                      domination after the phase transition, which would strongly
                      dilute any gravitationalwave signal, places a lower bound on
                      the portal coupling that governs the entropy transfer
                      betweenthe two sectors. As a result, the predictions for the
                      peak frequency of gravitational waves in theLISA band are
                      robust, while the amplitude can change depending on the
                      initial dark sectortemperature.},
      keywords     = {gravitational radiation: frequency (INSPIRE) / scale:
                      electroweak interaction (INSPIRE) / symmetry: gauge
                      (INSPIRE) / freeze-out: thermal (INSPIRE) / fermion: dark
                      matter (INSPIRE) / dark matter: relic density (INSPIRE) /
                      gravitational radiation: background (INSPIRE) / fermion:
                      mass (INSPIRE) / field theory: scalar (INSPIRE) / critical
                      phenomena (INSPIRE) / temperature (INSPIRE) / LISA (INSPIRE)
                      / hidden sector (INSPIRE) / new physics (INSPIRE) / WIMP
                      (INSPIRE) / U(1) (INSPIRE) / entropy (INSPIRE) / gauge boson
                      (INSPIRE) / spontaneous symmetry breaking (INSPIRE) /
                      correlation (INSPIRE) / gravitational radiation: primordial
                      (INSPIRE) / cosmological model (INSPIRE) / higher-order: 1
                      (INSPIRE) / dark matter: annihilation (INSPIRE) / Higgs
                      particle (INSPIRE) / cosmological phase transitions
                      (autogen) / dark matter theory (autogen) / particle physics
                      - cosmology connection (autogen) / primordial gravitational
                      waves (theory) (autogen)},
      cin          = {T},
      ddc          = {530},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) /
                      ASYMMETRY - Essential Asymmetries of Nature (101086085) /
                      DFG project 396021762 - TRR 257: Phänomenologische
                      Elementarteilchenphysik nach der Higgs-Entdeckung
                      (396021762)},
      pid          = {G:(DE-HGF)POF4-611 / G:(EU-Grant)101086085 /
                      G:(GEPRIS)396021762},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2311.06346},
      howpublished = {arXiv:2311.06346},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2311.06346;\%\%$},
      UT           = {WOS:001296044200043},
      doi          = {10.1088/1475-7516/2024/05/065},
      url          = {https://bib-pubdb1.desy.de/record/616514},
}