{
  "abstract": "The dielectric function is central to describing many-body screening effects in dark matter (DM) direct detection with condensed matter targets. Current superconducting detector analyses employ the free-electron Lindhard dielectric function to model in-medium effects, an approximation whose validity in the superconducting state remains untested. We derive the electronic dielectric function for bulk superconductors within the Bardeen-Cooper-Schrieffer (BCS) framework, incorporating the full Bogoliubov quasiparticle coherence factors in the random-phase approximation. A systematic comparison with the Lindhard function for aluminum and tungsten silicide (WSi) reveals good agreement for energy depositions $ω\\gtrsim5Δ$, establishing the Lindhard function as a robust approximation for superconducting DM detectors operating in this regime.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.06423",
  "author_total": 6,
  "authors": [
    {
      "name": "Chengyao Gan"
    },
    {
      "name": "Hui Li"
    },
    {
      "name": "Wenjing Li"
    },
    {
      "name": "Zheng-Liang Liang"
    },
    {
      "name": "Lin Zhang"
    },
    {
      "name": "Fawei Zheng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/81g5dssp707ts.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.06423",
  "fulltext_url": null,
  "id": "81g5dssp707ts",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.06423",
  "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": "W7212053842",
  "pdf_url": "https://arxiv.org/pdf/2609.06423",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/81g5dssp707ts.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.06423",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.06423"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "A Mean-Field Approach to the Dielectric Response of Bulk Superconductors for Light Dark Matter Direct Detection",
  "title_text": "A Mean-Field Approach to the Dielectric Response of Bulk Superconductors for Light Dark Matter Direct Detection",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/81g5dssp707ts",
  "venue": "arXiv",
  "versions": []
}