{
  "abstract": "The LUX-ZEPLIN (LZ) experiment has reported a high-energy nuclear recoil candidate, LZ230616, at $E_R = 248 \\pm 23_{\\rm stat} \\pm 23_{\\rm sys}\\,$keV, which is difficult to reconcile with elastic scattering of halo dark matter (DM). Endothermic inelastic scattering offers a natural explanation, but it rests on a nucleon coupling that is off-diagonal rather than diagonal. We show that this feature arises automatically within a radiative Dirac neutrino mass framework. The Standard Model is extended by three right-handed neutrinos (RHNs), a pair of vector-like neutral fermions for each generations, and a scalar sector comprising an inert doublet and a real singlet, governed by a $\\mathcal{Z}_2 \\times \\mathcal{Z}_4$ symmetry. The $\\mathcal{Z}_2$ symmetry stabilizes the DM, while the $\\mathcal{Z}_4$ symmetry forbids the tree-level Dirac Yukawa coupling together with all renormalizable Majorana mass terms, thereby allowing the generation of Dirac neutrino masses at the one-loop level through a softly broken scalar trilinear coupling `$κ$'. Since the neutral dark-sector fields can be expressed in terms of real scalar mass eigenstates, the $Z$ boson couples to them purely off-diagonally and elastic $Z$-mediated scattering is absent identically rather than simply suppressed. The singlet--doublet mixing induced by `$κ$' governs both the inelastic rate and the one-loop Dirac neutrino mass, which therefore vanish as $κ\\to 0$. We find that DM masses in the few hundred GeV to TeV range, with splittings of $\\mathcal{O}(340-360)\\,$ keV, simultaneously reproduce the observed relic abundance, account for the LZ event and yield neutrino masses of the correct order, while respecting elastic direct-detection limits and all relevant theoretical and experimental constraints. A substantial part of the surviving parameter space lies within reach of DARWIN.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.15027",
  "author_total": 3,
  "authors": [
    {
      "name": "Pankaj Borah"
    },
    {
      "name": "Satyabrata Mahapatra"
    },
    {
      "name": "Newton Nath"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3pry15q1zw4tw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.15027",
  "fulltext_url": null,
  "id": "3pry15q1zw4tw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.15027",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7213242444",
  "pdf_url": "https://arxiv.org/pdf/2609.15027",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3pry15q1zw4tw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.15027",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.15027"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Inelastic Dark Matter at LZ from Radiative Dirac Neutrino Mass Paradigm",
  "title_text": "Inelastic Dark Matter at LZ from Radiative Dirac Neutrino Mass Paradigm",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/3pry15q1zw4tw",
  "venue": "arXiv",
  "versions": []
}