{
  "abstract": "Near threshold, intra-tower decays of Kaluza-Klein (KK) gravitons are pure $d$-wave, with rate $Γ\\propto p^5$ in the decay products momentum $p$, rather than the $s$-wave $Γ\\propto p$ assumed in the dark dimension literature. In a flat dark dimension this excludes KK gravitons as a dark matter candidate. Even if some other source of dark matter is assumed, the irreducible freeze-in abundance of KK gravitons produce MeV gamma rays which allows one to set upper limits on the reheating temperature; additionally using the lower bound on the reheating temperature from big-bang nucleosynthesis and the cosmic microwave background requires the radius of the extra dimension to be almost three orders of magnitude smaller than the distance conjecture would naively prefer, $R\\sim Λ^{-1/4}$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.01825",
  "author_total": 1,
  "authors": [
    {
      "name": "Kevin Langhoff"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/86f81v44e5wmw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.01825",
  "fulltext_url": null,
  "id": "86f81v44e5wmw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.01825",
  "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-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.01825",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/86f81v44e5wmw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.01825",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.01825"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Near Threshold Kaluza-Klein Graviton Decays and the Dark Dimension",
  "title_text": "Near Threshold Kaluza-Klein Graviton Decays and the Dark Dimension",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/86f81v44e5wmw",
  "venue": "arXiv",
  "versions": []
}