{
  "abstract": "Recently, the LUX-ZEPLIN (LZ) collaboration reported the observation of a single dark matter (DM)-nucleus scattering event at a nuclear recoil energy of $248\\pm23_{\\rm stat}\\pm23_{\\rm sys}$ keV, corresponding to an exposure of 2.84 tonne-year. The absence of events at lower nuclear recoil energies in the predicted spectrum is naturally explained if the underlying process is inelastic DM-nucleus scattering. Motivated by this, we investigate the singlet-doublet fermion DM model, in which the DM consists of two pseudo-Dirac states: the Majorana nature of the lighter state forbids tree level $Z$-mediated elastic scattering identically, while the same states enable inelastic DM-nucleus scattering via $Z$ exchange, with any residual elastic scattering proceeding only through a suppressed Higgs-mediated channel. We further extend the model with a $Z_2$-even scalar triplet, which is responsible both for generating the pseudo-Dirac splitting and for realizing Majorana neutrino masses via the Type-II seesaw mechanism.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.07800",
  "author_total": 4,
  "authors": [
    {
      "name": "Debasish Borah"
    },
    {
      "name": "Sujit Kumar Sahoo"
    },
    {
      "name": "Narendra Sahu"
    },
    {
      "name": "Shashwat Sharma"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5chjvp1vs0bv8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.07800",
  "fulltext_url": null,
  "id": "5chjvp1vs0bv8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.07800",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7212004725",
  "pdf_url": "https://arxiv.org/pdf/2609.07800",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5chjvp1vs0bv8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.07800",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.07800"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Inelastic Singlet-Doublet Fermion Dark Matter in light of the 248 keV LZ event",
  "title_text": "Inelastic Singlet-Doublet Fermion Dark Matter in light of the 248 keV LZ event",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/5chjvp1vs0bv8",
  "venue": "arXiv",
  "versions": []
}