{
  "abstract": "We present the connected even-parity galaxy 4-Point Correlation Function (4PCF) of DESI Year 1 (Y1) Luminous Red Galaxies (LRGs). This is one of the first measurements of the connected 4PCF on data, and shows a clear detection at $\\sim$12 to 17$σ$ in the full-sky analysis. We test the robustness of the signal by varying three factors: hemisphere (north vs. south), redshift range (either the full range $0.4 < z < 1.1$ or the higher-number-density interval $0.4 < z < 0.8$), and sample completeness (the full sample vs. only the most complete regions within the number density-motivated cut). Finally, we cross-correlate different patches that are spatially well-separated, and thus should have largely independent noise. This approach, at leading order, is able to remove mismatch between the covariance matrix of the data and that of the mocks; however, in certain cases at the cost of sensitivity. We find $\\sim$15$σ$ evidence for an even-parity 4PCF in this approach. Overall, the studies of the 4PCF presented here probe sensitively any mismatch between mock catalogs and data, and also open up the prospect of fitting a model, constraining cosmological parameters and galaxy biases, and searching for Baryon Acoustic Oscillation (BAO) features.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.09340",
  "author_total": 49,
  "authors": [
    {
      "name": "William Ortolá Leonard"
    },
    {
      "name": "Alex Krolewski"
    },
    {
      "name": "Zachary Slepian"
    },
    {
      "name": "Alessandro Greco"
    },
    {
      "name": "Simon May"
    },
    {
      "name": "J Aguilar"
    },
    {
      "name": "S Ahlen"
    },
    {
      "name": "O Alves"
    },
    {
      "name": "A Aviles"
    },
    {
      "name": "F Beutler"
    },
    {
      "name": "D Bianchi"
    },
    {
      "name": "D Brooks"
    },
    {
      "name": "A Carnero Rosell"
    },
    {
      "name": "T Claybaugh"
    },
    {
      "name": "A de la Macorra"
    },
    {
      "name": "Biprateep Dey"
    },
    {
      "name": "S Ferraro"
    },
    {
      "name": "J.E Forero-Romero"
    },
    {
      "name": "E Gaztañaga"
    },
    {
      "name": "Satya Gontcho A. Gontcho"
    },
    {
      "name": "G Gutierrez"
    },
    {
      "name": "K Honscheid"
    },
    {
      "name": "D Huterer"
    },
    {
      "name": "M Ishak"
    },
    {
      "name": "S Juneau"
    },
    {
      "name": "T Karim"
    },
    {
      "name": "R Kehoe"
    },
    {
      "name": "D Kirkby"
    },
    {
      "name": "O Lahav"
    },
    {
      "name": "M Landriau"
    },
    {
      "name": "L Le Guillou"
    },
    {
      "name": "M Manera"
    },
    {
      "name": "A Meisner"
    },
    {
      "name": "R Miquel"
    },
    {
      "name": "J.A Newman"
    },
    {
      "name": "E Paillas"
    },
    {
      "name": "W.J Percival"
    },
    {
      "name": "F Prada"
    },
    {
      "name": "I Pérez-Ràfols"
    },
    {
      "name": "C Ravoux"
    },
    {
      "name": "R Ruggeri"
    },
    {
      "name": "L Samushia"
    },
    {
      "name": "E Sanchez"
    },
    {
      "name": "C Saulder"
    },
    {
      "name": "D Schlegel"
    },
    {
      "name": "J.H Silber"
    },
    {
      "name": "M Siudek"
    },
    {
      "name": "G Tarlé"
    },
    {
      "name": "B.A Weaver"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5f45eftj9qtrc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09340",
  "fulltext_url": null,
  "id": "5f45eftj9qtrc",
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  "landing_url": "https://hal.science/hal-05758206v1",
  "language": "en",
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  "licence_label": "arXiv licence",
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  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.CO"
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    [
      "hal",
      "0.phys"
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    [
      "hal",
      "1.phys.astr"
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    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
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  "openalex": "W7212182311",
  "pdf_url": "https://arxiv.org/pdf/2609.09340",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5f45eftj9qtrc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "hal-05758206",
      "source": "hal",
      "url": "https://hal.science/hal-05758206v1"
    },
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.09340",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09340"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "A Finely-Binned Measurement of the Connected Even-Parity Galaxy 4-Point Correlation Function of DESI Year 1 Luminous Red Galaxies",
  "title_text": "A Finely-Binned Measurement of the Connected Even-Parity Galaxy 4-Point Correlation Function of DESI Year 1 Luminous Red Galaxies",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/5f45eftj9qtrc",
  "venue": "HAL",
  "versions": []
}