{
  "abstract": "Pulsar timing arrays (PTAs) have detected a nanohertz gravitational-wave background, often attributed to annihilating domain walls (DWs) or first-order phase transitions (FOPTs). Their reheating imprints fluctuations in the baryon-to-photon ratio. These so-called baryon isocurvature fluctuations $S_B$ survive until Big Bang Nucleosynthesis, whose yields depend nonlinearly on it. Modest $S_B$ fluctuations can therefore alleviate the current deuterium tension in parts of the PTA preferred regions and therefore strengthen their interpretation. Overabundant DWs and too strong FOPTs overproduce $D/H$ and are ruled out.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.25950",
  "author_total": 5,
  "authors": [
    {
      "name": "Fatemeh Elahi"
    },
    {
      "name": "Diego Fortini"
    },
    {
      "name": "Yann Gouttenoire"
    },
    {
      "name": "Nicholas Leister"
    },
    {
      "name": "Pedro Schwaller"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e5wrk51mevrva.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25950",
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  "id": "e5wrk51mevrva",
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  "landing_url": "https://hal.science/hal-05781728v1",
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  "openalex": "W7214092033",
  "pdf_url": "https://arxiv.org/pdf/2609.25950",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e5wrk51mevrva.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:49Z",
      "native_id": "hal-05781728",
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      "url": "https://hal.science/hal-05781728v1"
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    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.25950",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25950"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
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    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
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  ],
  "title": "Big Bang Nucleosynthesis Confronts Domain Walls and First-Order Phase Transitions as the Pulsar Timing Array Explanations",
  "title_text": "Big Bang Nucleosynthesis Confronts Domain Walls and First-Order Phase Transitions as the Pulsar Timing Array Explanations",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/e5wrk51mevrva",
  "venue": "HAL",
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}