{
  "abstract": "We report on a search for dark matter particles interacting with xenon nuclei in an exposure of 2.84 tonne-years with the LUX-ZEPLIN (LZ) experiment. An extended nuclear recoil energy window up to approximately 270 keV enables searches for effective field theory and inelastic models of dark matter where high-energy recoils account for a larger fraction of the predicted recoil spectrum compared to the nominal spin independent interaction. We observe one event with characteristics consistent with a nuclear recoil of $248\\pm23\\,\\mathrm{(stat)}\\pm23\\,\\mathrm{(sys)}$ keV, in a region where the known background expectation is low. A profile likelihood ratio test finds tension with the background-only hypothesis at a global significance of 2.6$σ$ when accounting for look-elsewhere effects, with a maximum local significance of 3.4$σ$ across the models tested. We describe the analysis and event of interest, the background model used in the statistical inference, and detail several of the rare background topologies considered.",
  "abstract_shown": true,
  "affiliations": [
    "Kavli Institute for Particle Astrophysics and Cosmology , Stanford University , Stanford , CA 94305-4085 USA",
    "SLAC National Accelerator Laboratory , Menlo Park , CA 94025-7015 , USA",
    "Brown University , Department of Physics , Providence , RI 02912-9037 , USA",
    "University of California , Santa Barbara , Department of Physics , Santa Barbara , CA 93106-9530 , USA",
    "Lawrence Berkeley National Laboratory (LBNL) , Berkeley , CA 94720-8099 , USA",
    "University of Zurich , Department of Physics , 8057 Zurich , Switzerland",
    "Imperial College London , Physics Department , Blackett Laboratory , London SW7 2AZ , UK",
    "STFC Rutherford Appleton Laboratory (RAL) , Didcot , OX11 0QX , UK",
    "University of Maryland , Department of Physics , College Park , MD 20742-4111 , USA",
    "King's College London , Department of Physics , London WC2R 2LS , UK",
    "University of Oxford , Department of Physics , Oxford OX1 3RH , UK",
    "University of Wisconsin-Madison , Physical Sciences Laboratory , Stoughton , WI 53589-3034 , USA",
    "University of Edinburgh , School of Physics and Astronomy , Edinburgh EH9 3FD , UK",
    "University at Albany (SUNY) , Department of Physics , Albany , NY 12222-0100 , USA",
    "University of California , Davis , Department of Physics , Davis , CA 95616-5270 , USA",
    "Laboratório de Instrumentação e Física Experimental de Partículas (LIP) , Department of Physics , University of Coimbra , P-3004 516 Coimbra , Portugal",
    "University of Liverpool , Department of Physics , Liverpool L69 7ZE , UK",
    "Pennsylvania State University , Department of Physics , University Park , PA 16802-6300 , USA",
    "Royal Holloway , University of London , Department of Physics , Egham , TW20 0EX , UK",
    "University of California , Los Angeles , Department of Physics & Astronomy , Los Angeles , CA 90095-1547",
    "University of Rochester , Department of Physics and Astronomy , Rochester , NY 14627-0171 , USA",
    "University College London (UCL) , Department of Physics and Astronomy , London WC1E 6BT , UK",
    "Northwestern University , Department of Physics & Astronomy , Evanston , IL 60208-3112 , USA",
    "South Dakota Science and Technology Authority (SDSTA) , Sanford Underground Research Facility , Lead , SD 57754-1700 , USA",
    "Fermi National Accelerator Laboratory (FNAL) , Batavia , IL 60510-5011 , USA",
    "University of Bristol , H.H. Wills Physics Laboratory , Bristol , BS8 1TL , UK",
    "The University of Sydney , School of Physics , Physics Road , Camperdown , Sydney , NSW 2006 , Australia"
  ],
  "article_type": null,
  "arxiv": "2609.02823",
  "author_total": 100,
  "authors": [
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    {
      "name": "A. K. Al Musalhi",
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      "name": "B. J. Almquist"
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      "name": "C. S. Amarasinghe",
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      "name": "Tyler Anderson",
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      "name": "H M Araújo"
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      "name": "T. Benson"
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      "name": "H. J. Birch",
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      "name": "E. Bishop"
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      "name": "G. M. Blockinger",
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      "name": "B. Boxer"
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      "name": "C. Brew"
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        15
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      "name": "P. Brás"
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        16
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      "name": "Sergey V. Burdin",
      "orcid": "0000-0003-4831-4132"
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      "name": "M. C. Carmona-Benitez",
      "orcid": "0000-0001-7052-2785"
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        16
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      "name": "M. Carter"
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        18
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      "name": "A. Chawla",
      "orcid": "0000-0003-1905-2591"
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      "affs": [
        11
      ],
      "name": "J. J. Cherwinka"
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    {
      "affs": [
        17
      ],
      "name": "Y. T. Chin"
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    {
      "affs": [
        19
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      "name": "S. Contreras"
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        20
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      "name": "M. V. Converse"
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        1
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      "name": "R. Coronel"
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    {
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        21
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      "name": "A. Cottle",
      "orcid": "0000-0003-4274-3622"
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        22
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      "name": "C. Coulson"
    },
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      "affs": [
        23
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      "name": "G. A. Cox"
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    {
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        24,
        22
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      "name": "C. E. Dahl",
      "orcid": "0000-0003-1637-2346"
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        21
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      "name": "I. Darlington"
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        21
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      "name": "S. Dave"
    },
    {
      "affs": [
        23
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      "name": "J. Delgaudio"
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        19
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      "name": "S. Desai"
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        10
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      "name": "S. Dey"
    },
    {
      "affs": [
        17
      ],
      "name": "L. de Viveiros"
    },
    {
      "name": "L. Di Felice"
    },
    {
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        2
      ],
      "name": "C. Ding"
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      "name": "J. E. Y. Dobson",
      "orcid": "0000-0002-4911-598X"
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      "name": "E. Druszkiewicz"
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      "name": "C. L. Dunbar"
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      "name": "Henning U Flaecher",
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      "name": "E. D. Fraser"
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      "name": "T. Fruth",
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      "name": "P. Gaemers",
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  "bibtex": "https://research.draconitic.com/paper/bfq735jcc5akk.bib",
  "cited_by": 93,
  "doi": "10.48550/arxiv.2609.02823",
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  "issns": [
    "2331-8422"
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  "landing_url": "https://arxiv.org/abs/2609.02823",
  "language": "en",
  "licence": "CC-BY-NC-SA-4.0",
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  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
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      "hep-ex"
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  "pdf_url": "https://arxiv.org/pdf/2609.02823",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": "Cornell University",
  "ris": "https://research.draconitic.com/paper/bfq735jcc5akk.ris",
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      "first_seen": "2026-10-30T12:18:16Z",
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  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
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  ],
  "title": "Search for dark matter particle interactions in an extended nuclear recoil energy window with the LUX-ZEPLIN (LZ) experiment",
  "title_text": "Search for dark matter particle interactions in an extended nuclear recoil energy window with the LUX-ZEPLIN (LZ) experiment",
  "type": "preprint",
  "updated_at": "2026-11-07T13:20:44Z",
  "url": "https://research.draconitic.com/paper/bfq735jcc5akk",
  "venue": "arXiv",
  "versions": []
}