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    "headline": "A Hidden Strong Force Bent the Gravitational-Wave Spectrum",
    "slug": "a-hidden-strong-force-bent-the-gravitational-wave-spectrum",
    "dek": "A modeled dark-QCD crossover adds a shifted distortion to scalar-induced gravitational waves.",
    "summary": "A modeled dark-QCD crossover adds a shifted distortion to scalar-induced gravitational waves.",
    "body_text": "The calculation adds a confining dark sector, motivated by twin-Higgs and asymmetric dark-matter scenarios, to the thermal history used for scalar-induced gravitational waves. When an enhanced primordial mode re-enters near the dark confinement scale, the authors find an extra frequency-shifted feature above the ordinary QCD imprint. This is a theoretical signature under specified primordial and dark-sector assumptions, not a detection of dark QCD.",
    "why_it_matters": "A modeled dark-QCD crossover adds a shifted distortion to scalar-induced gravitational waves.",
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      "This is a theoretical signature under specified primordial and dark-sector assumptions, not a detection of dark QCD."
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        "qualification": "This is a theoretical signature under specified primordial and dark-sector assumptions, not a detection of dark QCD."
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    "tags": [
      "gravitational waves",
      "dark matter",
      "QCD",
      "cosmology"
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  "sources": [
    {
      "source_id": "source-2026-08-15-010",
      "title": "arXiv preprint 2608.12706",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.12706",
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      "published_at": "2026-08-12T21:38:52.000-04:00",
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    "title": "A Hidden Strong Force Bent the Gravitational-Wave Spectrum",
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    "published_at": "2026-08-15T09:00:00.000-04:00",
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