{
  "abstract": "The 21-cm signal from cosmic dawn is a potentially sensitive probe of interactions between dark matter (DM) and baryons. We investigate the implications of the SARAS3 non-detection in the 55.5-84.4 MHz band for Coulomb-like interacting DM (IDM). In contrast to earlier constraint analyses that focused primarily on baryon cooling, we model the interaction self-consistently by including both excess cooling of the gas and the suppression of structure formation, which delays the onset of star formation and hence suppresses the Ly$α$, X-ray, and ionizing backgrounds at early times. We perform a joint Bayesian fit of a global 21-cm signal model and a flexible foreground model to the SARAS3 antenna temperature, and find that the signal parameters remain weakly constrained after marginalizing over the foregrounds. The null result is nonetheless informative: the data disfavour deep absorption features within the observed band, with the strongest bound at $z = 23.6$ ($ν\\approx 57.7$ MHz), where $T_{21} \\gtrsim -277.6$ mK at $3σ$. Comparing the IDM and standard cold dark matter scenarios, we find no statistically significant preference for IDM (Bayes factor $B \\approx 1.7$). While we do not constrain the strength of baryon-DM interactions, the SARAS3 non-detection places a meaningful upper bound on the amplitude of the global 21-cm signal in this class of models.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: JCAP 08 (2026) 085",
  "arxiv": "2605.00991",
  "author_total": 4,
  "authors": [
    {
      "name": "Shikhar Mittal"
    },
    {
      "name": "Prakhar Bansal"
    },
    {
      "name": "Harry Bevins"
    },
    {
      "name": "Saurabh Singh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8mkcjnr0qrx78.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.00991",
  "fulltext_url": null,
  "id": "8mkcjnr0qrx78",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.00991",
  "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"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.00991",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8mkcjnr0qrx78.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2605.00991",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.00991"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Implications of SARAS3 data for Coulomb-like interacting dark matter",
  "title_text": "Implications of SARAS3 data for Coulomb-like interacting dark matter",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/8mkcjnr0qrx78",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1088/1475-7516/2026/08/085",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}