{
  "abstract": "We study the entanglement structure of $Ω^-\\barΩ^+$ pairs produced in $e^+e^-\\toψ(3686)$, focusing on whether the entanglement requires the full four-dimensional spin space of each spin-$3/2$ baryon. Beam polarization controls the parent-state populations and coherence, thereby modifying helicity interference. Using the negativity criterion $\\Neg>1$ and the measured BESIII helicity parameters, we find critical polarizations of about $0.65$ per beam for equal transverse polarization and $0.57$ per beam for equal-and-opposite longitudinal polarization. Full transverse polarization gives a near-maximal peak negativity, $\\Neg_{\\rm peak}\\simeq1.50$, with a production-rate-weighted angular fraction of $0.60$ satisfying the witness. At the optimal production directions, destructive interference removes the unequal-helicity channels, while the near equality of the relevant equal-helicity amplitudes yields nearly equal Schmidt coefficients. Constituent-quark benchmarks further show that the angular extent of the witness is more sensitive to relative phases than the peak negativity. These results link polarization-controlled helicity interference to four-dimensional entanglement in high-spin baryon production.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.32419",
  "author_total": 3,
  "authors": [
    {
      "name": "Qiu-Yan Zhang"
    },
    {
      "name": "Peng-Cheng Hong"
    },
    {
      "name": "Wei-Min Song"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4b59wv0ks5zr1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.32419",
  "fulltext_url": null,
  "id": "4b59wv0ks5zr1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.32419",
  "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",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7214805914",
  "pdf_url": "https://arxiv.org/pdf/2609.32419",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4b59wv0ks5zr1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.32419",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.32419"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Beam-polarization-enabled witness of four-dimensional entanglement in $Ω^-\\barΩ^+$ pairs",
  "title_text": "Beam-polarization-enabled witness of four-dimensional entanglement in Ω^-Ω̅^+ pairs",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/4b59wv0ks5zr1",
  "venue": "arXiv",
  "versions": []
}