{
  "abstract": "We investigate whether cosmic ray boosted dark matter (CRDM) can explain the 248 keV nuclear recoil event observed by the LUX-ZEPLIN (LZ) collaboration. We consider spin-dependent interactions, mediated by a pseudoscalar, and incorporate relativistic kinematics in CRDM production, propagation, and detection. We find that spin-dependent interactions can produce sufficient number of nuclear recoils in the observed region of interest, without populating events at lower energies, which have not been observed. However, for a benchmark pseudoscalar interaction corresponding to the non-relativistic effective operator $\\mathbb{O}_6$, the coupling required to produce the observed event corresponds to an energy scale comparable to the momentum transfer scales, thus making contact interaction approach challenging. Instead, we find that a pseudoscalar mediator with mass $\\sim 300\\,$MeV and $O(1)$ couplings can provide a promising solution to this unexplained event.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.24982",
  "author_total": 3,
  "authors": [
    {
      "name": "Bhavesh Chauhan"
    },
    {
      "name": "Soham Sahasrabuddhe"
    },
    {
      "name": "Manibrata Sen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/80028ffp5cqme.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.24982",
  "fulltext_url": null,
  "id": "80028ffp5cqme",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.24982",
  "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",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7214033952",
  "pdf_url": "https://arxiv.org/pdf/2609.24982",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/80028ffp5cqme.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:20Z",
      "native_id": "2609.24982",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.24982"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "A closer look at the LZ 248 keV event through the lens of cosmic-ray boosted dark matter",
  "title_text": "A closer look at the LZ 248 keV event through the lens of cosmic-ray boosted dark matter",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:20Z",
  "url": "https://research.draconitic.com/paper/80028ffp5cqme",
  "venue": "arXiv",
  "versions": []
}