{
  "abstract": "We present an updated analysis of non-standard neutrino self-interactions, where the interaction is effectively mediated by a heavy particle, using the latest available data from DESI and the CMB. The considered data include combinations of DESI DR1 full-shape galaxy clustering (FS), BAO distance measurements, Lyman-$α$ 1D power spectra (Ly-$α$), and a combined CMB likelihood (CMB-SPA) using data from Planck, ACT, and SPT. First, we probe two DESI DR1-only datasets, where the effective interaction parameter $G_{\\rm eff}$ is multimodal in the profile likelihood, leading us to analyze two different regimes: moderately interacting (MI$_ν$) and strongly interacting (SI$_ν$) neutrinos. With FS+BAO, the evidence disfavors the SI$_ν$ mode, a trend that becomes slightly stronger with the inclusion of Ly-$α$. However, in the latter dataset, the MI$_ν$ region shows a bimodality in which the intermediate mode is very sharp and peaks around $G_{\\rm eff\\,} \\simeq 10^{-3} \\mathrm{MeV}^{-2}$; interestingly, this mode is not penalized versus the weaker standard-like mode. Furthermore, we test CMB and DESI joint data and show that the SI$_ν$ mode is more disfavored by CMB-SPA than by Planck-only data. In particular, the evidence against this mode becomes the strongest thus far (with odds of 5:100000) in the FS+BAO+CMB-SPA combination.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.26654",
  "author_total": 5,
  "authors": [
    {
      "name": "Hernán E. Noriega"
    },
    {
      "name": "Josue De-Santiago"
    },
    {
      "name": "Gabriela Garcia-Arroyo"
    },
    {
      "name": "Ivan Pérez-Castro"
    },
    {
      "name": "Jorge Venzor"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5t846v8mc5hax.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.26654",
  "fulltext_url": null,
  "id": "5t846v8mc5hax",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.26654",
  "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",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7223033673",
  "pdf_url": "https://arxiv.org/pdf/2610.26654",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5t846v8mc5hax.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.26654",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.26654"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Neutrino self-interactions in light of DESI and CMB-SPA",
  "title_text": "Neutrino self-interactions in light of DESI and CMB-SPA",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/5t846v8mc5hax",
  "venue": "arXiv",
  "versions": []
}