{
  "abstract": "We present the first search for fixed-polarization dark photon (DP) dark matter in the 44-52$μ\\mathrm{eV}$ mass range, corresponding to 10.7-12.5GHz. GigaBREAD is a room-temperature broadband dish antenna experiment in which DP convert to ordinary photons on a cylindrical metallic emission surface and are focused onto a radio-frequency receiver. Previous searches, including GigaBREAD and several other dish antenna searches, have assumed randomly polarized DP dark matter. However, vector dark matter produced by a misalignment-like mechanism may retain an approximately fixed polarization, leading to sidereal modulation of the detector response as the Earth rotates. We reanalyze the GigaBREAD data using a polarization-matched likelihood that accounts for the time-dependent projection of a fixed DP polarization onto the detector axis. We find no evidence for a fixed-polarization DP signal and set upper limits on the kinetic mixing parameter at the level of $χ\\sim10^{-12}$. These limits are about $20\\%$ better than a naive limit obtained by rescaling the previous GigaBREAD limit under the fixed-polarization assumption.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.07426",
  "author_total": 7,
  "authors": [
    {
      "name": "Jialin Yu"
    },
    {
      "name": "Stefan Knirck"
    },
    {
      "name": "Gabe Hoshino"
    },
    {
      "name": "Rakshya Khatiwada"
    },
    {
      "name": "Alex Lapuente"
    },
    {
      "name": "David W. Miller"
    },
    {
      "name": "Andrew Sonnenschein"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0v2wtk5cg0sx7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.07426",
  "fulltext_url": null,
  "id": "0v2wtk5cg0sx7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.07426",
  "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.IM"
    ],
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "physics.ins-det"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.07426",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0v2wtk5cg0sx7.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2611.07426",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.07426"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "First broadband search for fixed-polarization dark photon dark matter with GigaBREAD",
  "title_text": "First broadband search for fixed-polarization dark photon dark matter with GigaBREAD",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:41Z",
  "url": "https://research.draconitic.com/paper/0v2wtk5cg0sx7",
  "venue": "arXiv",
  "versions": []
}