{
  "abstract": "We present cosmological constraints from DESI DR1 full-shape measurements, including the LRG bispectrum, combined with DESI DR2 BAO data. The analysis accounts for cross-covariance using mocks, while ShapeFit compression mitigates prior volume effects in beyond-$Λ$CDM analyses. In $Λ$CDM, the DESI1.5 (P+B) analysis yields $σ_8=0.868\\pm0.026$ and $S_8=0.880\\pm0.028$, compared with $σ_8=0.822\\pm0.034$ and $S_8=0.827\\pm0.036$ in the previous power-spectrum-only analysis. The marginalized uncertainties are reduced by 24% and 22%, respectively. For $w_0w_a$CDM, DESI-only analyses with the bispectrum shift dark energy parameters toward $Λ$CDM, consistent with a cosmological constant within $1σ$ in the $w_0$--$w_a$ plane. Adding CMB creates a preference for evolving dark energy: DESI+CMB (P+B) shows a $2.8σ$ deviation from $Λ$CDM. Including DES-Dovekie supernovae alone reduces this to $1.6σ$, while the full combination gives $3.1σ$. The bispectrum weakens evidence for time-varying dark energy relative to power-spectrum-only analyses. It also enhances sensitivity to massive neutrinos: in DESI-only data, the power-spectrum-only posterior for $\\sum m_ν$ is consistent with zero, whereas adding the bispectrum yields $0.26\\pm0.18$ eV and a 95% upper limit of $0.59$ eV, shifting the peak into the positive region. For modified gravity, the bispectrum constrains $μ_0 = 0.12\\pm0.51$ from DESI-only data, consistent with general relativity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.23936",
  "author_total": 51,
  "authors": [
    {
      "name": "D. Forero-Sánchez"
    },
    {
      "name": "S. Novell-Masot"
    },
    {
      "name": "H. Gil-Marín"
    },
    {
      "name": "L. Verde"
    },
    {
      "name": "J. Aguilar"
    },
    {
      "name": "S. Ahlen"
    },
    {
      "name": "D. Bianchi"
    },
    {
      "name": "A. Brodzeller"
    },
    {
      "name": "D. Brooks"
    },
    {
      "name": "F. J. Castander"
    },
    {
      "name": "S. Cole"
    },
    {
      "name": "A. de la Macorra"
    },
    {
      "name": "J. Della Costa"
    },
    {
      "name": "Biprateep Dey"
    },
    {
      "name": "P. Doel"
    },
    {
      "name": "S. Ferraro"
    },
    {
      "name": "A. Font-Ribera"
    },
    {
      "name": "J. E. Forero-Romero"
    },
    {
      "name": "Satya Gontcho A Gontcho"
    },
    {
      "name": "G. Gutierrez"
    },
    {
      "name": "C. Hahn"
    },
    {
      "name": "H. K. Herrera-Alcantar"
    },
    {
      "name": "K. Honscheid"
    },
    {
      "name": "D. Huterer"
    },
    {
      "name": "M. Ishak"
    },
    {
      "name": "D. Kirkby"
    },
    {
      "name": "A. Kremin"
    },
    {
      "name": "O. Lahav"
    },
    {
      "name": "C. Lamman"
    },
    {
      "name": "M. Landriau"
    },
    {
      "name": "L. Le Guillou"
    },
    {
      "name": "M. E. Levi"
    },
    {
      "name": "M. Manera"
    },
    {
      "name": "A. Meisner"
    },
    {
      "name": "R. Miquel"
    },
    {
      "name": "J. Moustakas"
    },
    {
      "name": "S. Nadathur"
    },
    {
      "name": "J. A. Newman"
    },
    {
      "name": "G. Niz"
    },
    {
      "name": "N. Palanque-Delabrouille"
    },
    {
      "name": "W. J. Percival"
    },
    {
      "name": "F. Prada"
    },
    {
      "name": "I. Pérez-Ràfols"
    },
    {
      "name": "G. Rossi"
    },
    {
      "name": "L. Samushia"
    },
    {
      "name": "E. Sanchez"
    },
    {
      "name": "D. Schlegel"
    },
    {
      "name": "M. Schubnell"
    },
    {
      "name": "J. Silber"
    },
    {
      "name": "G. Tarlé"
    },
    {
      "name": "B. A. Weaver"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1e4ng2x0g72yp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.23936",
  "fulltext_url": null,
  "id": "1e4ng2x0g72yp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.23936",
  "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"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7165757405",
  "pdf_url": "https://arxiv.org/pdf/2606.23936",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1e4ng2x0g72yp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2606.23936",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.23936"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    }
  ],
  "title": "Cosmological constraints from the DESI DR1 Bispectrum Full-Shape and DR2 BAO",
  "title_text": "Cosmological constraints from the DESI DR1 Bispectrum Full-Shape and DR2 BAO",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/1e4ng2x0g72yp",
  "venue": "arXiv",
  "versions": []
}