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@ARTICLE{Inomata:642900,
      author       = {Inomata, Keisuke and Kamionkowski, Marc and Kasai, Kentaro
                      and Shakya, Bibhushan},
      title        = {{G}ravitational waves from particles produced from bubble
                      collisions in first-order phase transitions},
      journal      = {Physical review / D},
      volume       = {112},
      number       = {8},
      issn         = {2470-0010},
      address      = {Ridge, NY},
      publisher    = {American Physical Society},
      reportid     = {PUBDB-2025-05696, arXiv:2412.17912. DESY-24-219},
      pages        = {083523},
      year         = {2025},
      note         = {12 pages + Appendices, 6 figures},
      abstract     = {We discuss a new source of gravitational waves (GWs) from
                      first-order phase transitions. The collisions of bubbles of
                      the new phase can efficiently produce particles that couple
                      to the background field undergoing the transition, thereby
                      transferring a significant fraction of the released vacuum
                      energy into a distribution of inhomogeneous and dynamic
                      particle populations that persist long after the bubbles
                      have disappeared. We study the GWs produced by such particle
                      distributions, showing that GWs arise from the quadrupolar
                      anisotropy in the radiation emitted from the bubble
                      collisions, and present a semianalytical calculation of the
                      two-point correlation function for the associated energy
                      distributions. We find that this new contribution can
                      qualitatively modify the overall GW signal from such phase
                      transitions, creating a distinct shift in the spectral slope
                      at low frequencies that could be observed by future GW
                      experiments. It is therefore important to take this new
                      contribution into account for any transition where the
                      background field has significant self-coupling or couplings
                      to other fields that could lead to efficient particle
                      production at bubble collision.},
      cin          = {T},
      ddc          = {530},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)390833306 - EXC 2121: Das Quantisierte
                      Universum II (390833306) / DFG project G:(GEPRIS)491245950 -
                      Open-Access-Publikationskosten / 2025-2027 / DESY Hamburg
                      (491245950)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306 /
                      G:(GEPRIS)491245950},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2412.17912},
      howpublished = {arXiv:2412.17912},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2412.17912;\%\%$},
      doi          = {10.1103/k4s5-8zqy},
      url          = {https://bib-pubdb1.desy.de/record/642900},
}