{
  "abstract": "We build an ultralight dark matter model with repulsive self-interactions, starting from a 5D action that only includes a $U(1)$ gauge field and several massive and charged free fermions. The dark matter scalar field corresponds to the fifth component of the gauge field, after compactification to 4D. Although the single-fermion case only leads to attractive self-interactions, two fermions can already give rise to repulsive self-interactions, thanks to a Scherk-Schwarz twist around the fifth dimension. We check the observational and theoretical self-consistency of this scenario, from the inflation stage to the current time. We find that large ranges of model parameters are allowed. For scalar masses below $10^{-12}$ eV the self-interactions are negligible and the model behaves as fuzzy dark matter. For higher masses the repulsive self-interactions govern the formation of solitons of astrophysical size. Larger sizes require a large initial misalignment or small masses in the fuzzy dark matter regime.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 083527 (2026)",
  "arxiv": "2607.17727",
  "author_total": 2,
  "authors": [
    {
      "name": "Philippe Brax"
    },
    {
      "name": "Patrick Valageas"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4ksa615e28q4s.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.17727",
  "fulltext_url": null,
  "id": "4ksa615e28q4s",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.17727",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7169848491",
  "pdf_url": "https://arxiv.org/pdf/2607.17727",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4ksa615e28q4s.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2607.17727",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.17727"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Repulsive ultralight dark matter from Hosotani mechanism",
  "title_text": "Repulsive ultralight dark matter from Hosotani mechanism",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/4ksa615e28q4s",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/xjql-1kl2",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}