{
  "abstract": "We study Majorana neutrino masses and the matter-antimatter asymmetry in Type IIA string theory on a $T^6/(\\mathbb{Z}_2 \\times \\mathbb{Z}_2)$ orientifold with intersecting D6-branes. Euclidean D2-instantons with $\\text{Sp}(2)$ Chan-Paton symmetry generate both the seesaw mechanism and the Weinberg operator. The flavour vectors are not computed from a compactification but fixed by matching, so our results are an existence proof. Matching the measured mass-squared differences selects the seesaw-dominated case with normal ordering. Swampland criteria constrain the instanton action and the reheating temperature. A benchmark example reproduces the neutrino parameters, gives $η_B \\approx 8.6 \\times 10^{-11}$, within an order of magnitude of observation, and predicts $\\langle m_{ββ} \\rangle =2.594 \\text{meV}$. A parameter scan shows the mass hierarchy is accommodated rather than predicted.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.39804",
  "author_total": 1,
  "authors": [
    {
      "name": "Yang Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fyfg7p5hxnxr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.39804",
  "fulltext_url": null,
  "id": "4fyfg7p5hxnxr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.39804",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.39804",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fyfg7p5hxnxr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.39804",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.39804"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Majorana Neutrino Physics and Matter-Antimatter Asymmetry in Type IIA String Theory",
  "title_text": "Majorana Neutrino Physics and Matter-Antimatter Asymmetry in Type IIA String Theory",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/4fyfg7p5hxnxr",
  "venue": "arXiv",
  "versions": []
}