{
  "abstract": "We analyse pre-DESI clustering data using a dark energy equation of state w ( z ) parametrised by ( w 0 , w a ), finding a 2.8-3.9 σ preference for evolving dark energy over the cosmological constant Λ when combined with cosmic microwave background data from Planck and supernova data from Pantheon+, Union3, or DESY5. Our constraints, consistent with DESI Y1 results, are derived from the power spectrum and bispectrum of SDSS/BOSS galaxies using the Effective Field Theory of Large Scale Structure (EFTofLSS) at one loop. The evidence, estimated as the Gaussian-equivalent significance from the Δχ 2 -statistics to ( w 0 , w a ) = (-1, 0) for two degrees of freedom, remains robust across analysis variations but disappears without the one-loop bispectrum. When combining DESI baryon acoustic oscillations with BOSS full-shape data, while marginalising over the sound horizon in the latter to partially mitigate potential correlations, the significance increases to 3.7-4.4 σ , depending on the supernova dataset. Using instead a data-driven reconstruction of w ( z ), we show that deviations from Λ can be observed at multiple redshifts, though at a low level of significance: only when imposing the specific parametrisation implied by ( w 0 , w a ) the above evidence emerges. In addition, our findings are interpreted within the Effective Field Theory of Dark Energy (EFTofDE), from which we explicitly track the non-standard time evolution in EFTofLSS predictions. For perturbatively stable theories in the w < -1 regime, the preference for w 0 w a CDM persists notably in the clustering limit ( c s 2 → 0) when higher-derivative corrections are present.",
  "abstract_shown": true,
  "affiliations": [
    "CAS Key Laboratory for Research in Galaxies and Cosmology, School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026,",
    "Deep Space Exploration Laboratory, Hefei 230088,",
    "Department of Astronomy, School of Physical Sciences, University of Science and Technology of China Hefei, Anhui 230026,",
    "Laboratoire Univers & Particules de Montpellier, CNRS & Université de Montpellier, 34095 Montpellier,",
    "LUPM - Laboratoire Univers et Particules de Montpellier (Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05 - France)",
    "Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, 20133 Milan,",
    "Institut für Theoretische Physik, ETH Zürich, 8093 Zürich,",
    "Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zürich,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Zhiyu Lu",
      "orcid": "0009-0001-3701-6650"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Théo Simon",
      "orcid": "0000-0001-7858-6441"
    },
    {
      "affs": [
        5,
        6,
        7
      ],
      "name": "Pierre Zhang",
      "orcid": "0000-0002-2866-7363"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fh0vbqyfmcqh.bib",
  "cited_by": 20,
  "doi": "10.1088/1475-7516/2026/10/052",
  "fulltext_url": null,
  "id": "4fh0vbqyfmcqh",
  "issns": [
    "1475-7508",
    "1475-7516"
  ],
  "landing_url": "https://doi.org/10.1088/1475-7516/2026/10/052",
  "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": [
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      "openalex",
      "3103|Cosmology and Gravitation Theories"
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  "openalex": "W4415314625",
  "pdf_url": "https://iopscience.iop.org/article/10.1088/1475-7516/2026/10/052/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "Institute of Physics",
  "ris": "https://research.draconitic.com/paper/4fh0vbqyfmcqh.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:20:45Z",
      "native_id": "W4415314625",
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      "url": "https://doi.org/10.1088/1475-7516/2026/10/052"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Preference for evolving dark energy in light of the galaxy bispectrum",
  "title_text": "Preference for evolving dark energy in light of the galaxy bispectrum",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T13:21:03Z",
  "url": "https://research.draconitic.com/paper/4fh0vbqyfmcqh",
  "venue": "Journal of Cosmology and Astroparticle Physics",
  "versions": []
}