{
  "abstract": "We investigate potential deviations from cold dark matter (CDM) using the latest Baryon Acoustic Oscillations (BAO) measurements from the Dark Energy Spectroscopic Instrument (DESI). Analyzing DESI data alone constrains the dark matter equation of state parameter w dm = − 0 . 042 − 0.024 + 0.047 , revealing a mild preference for non-cold dark matter. This preference strengthens significantly in combined analyses, but reveals a striking tension in the inferred w dm values from observations of different nature. The DESI+DESY5 combination yields w dm = − 0.084 ± 0.035 , excluding CDM ( w dm = 0 ) at 2.4 σ significance. In contrast, Planck+DESI gives w dm = 0.00077 ± 0.00038 , differing from concordance model at 2 σ significance. The non-vanishing w dm preference is particularly driven by low-redshift BAO measurements ( z < 1.1), while higher redshift data remain consistent with ΛCDM. The preference for non-cold dark matter is more pronounced in DESI compared to the previous BAO surveys. All dataset combinations show significant improvement over the ΛCDM paradigm, providing preference for non-cold dark matter scenario except DESI+DESY3+DES-DOV case.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Physics, University of Ottawa, Ottawa, ON K1N6N5, Canada",
    "Indian Institute of Science Education and Research Bhopal, Bhopal 462066, India",
    "Physics Department, Ariel University, Ariel 40700, Israel"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Utkarsh Kumar",
      "orcid": "0000-0002-8158-2078"
    },
    {
      "affs": [
        1
      ],
      "name": "Abhijith Ajith",
      "orcid": "0009-0009-0213-2406"
    },
    {
      "affs": [
        2
      ],
      "name": "Amresh Verma",
      "orcid": "0009-0003-0372-2359"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b3fxddt78v03r.bib",
  "cited_by": 29,
  "doi": "10.1016/j.physletb.2026.140858",
  "fulltext_url": null,
  "id": "b3fxddt78v03r",
  "issns": [
    "0370-2693",
    "1873-2445"
  ],
  "landing_url": "https://doi.org/10.1016/j.physletb.2026.140858",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
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  "openalex": "W7203549629",
  "pdf_url": "https://www.sciencedirect.com/science/article/pii/S0370269326007094/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-15",
  "publisher": "Elsevier BV",
  "ris": "https://research.draconitic.com/paper/b3fxddt78v03r.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:20:44Z",
      "native_id": "W7203549629",
      "source": "openalex",
      "url": "https://doi.org/10.1016/j.physletb.2026.140858"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Cosmological constraints on non-cold dark matter from DESI DR2 measurements",
  "title_text": "Cosmological constraints on non-cold dark matter from DESI DR2 measurements",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T13:20:38Z",
  "url": "https://research.draconitic.com/paper/b3fxddt78v03r",
  "venue": "Physics Letters B",
  "versions": []
}