{
  "abstract": "Short-lived hadron resonances serve as sensitive probes of the late-stage hadronic medium in heavy-ion collisions. Using the AMPT-HC model, we study ${\\rm{K}}^{*}(892)$ production and its hadronic medium effects in Au+Au collisions at $\\sqrt{s_{\\rm{NN}}} = 3$ GeV, a region of high baryon density. We introduce a phenomenological direct-production mechanism for ${\\rm K}^{*}$ by replacing a fraction of the final-state kaons produced in the ${\\rm NN} \\to {\\rm NYK}$ and ${\\rm MN} \\to {\\rm YK}$ channels with ${\\rm K}^{*}$ resonances, with the substitution fraction controlled by a parameter $α$ while conserving four-momentum. The direct ${\\rm K}^{*}$ is produced early, at about 6 fm/$c$, with little centrality dependence, whereas resonance fusion via ${\\rm K}+π\\to{\\rm K}^{*}$ occurs later, with the mean production time increasing from about 8 to 10 fm/$c$ toward central collisions. Consequently, direct ${\\rm K}^{*}$ mesons suffer stronger daughter rescattering, leading to a pronounced decrease in reconstruction efficiency toward central collisions, while the ${\\rm K}^{*}$ survival rate remains close to unity. Elastic scattering of the daughters also shifts the invariant mass away from the resonance peak, contributing to the background-like component. The ${\\rm K}^{*}/{\\rm K}$ centrality dependence reflects the competition between direct production and resonance fusion and is sensitive to $α$. At 3 GeV, a moderate direct-production contribution may result in an increasing ${\\rm K}^{*}/{\\rm K}$ ratio toward central collisions, providing a testable prediction for future measurements.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.07442",
  "author_total": 6,
  "authors": [
    {
      "name": "Hongcan Li"
    },
    {
      "name": "Yun Liu"
    },
    {
      "name": "Guangyu Zheng"
    },
    {
      "name": "Yaping Wang"
    },
    {
      "name": "Guannan Xie"
    },
    {
      "name": "Gao-chan Yong"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f9238kp368ybp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.07442",
  "fulltext_url": null,
  "id": "f9238kp368ybp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.07442",
  "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"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|High-Energy Particle Collisions Research"
    ]
  ],
  "openalex": "W7212063118",
  "pdf_url": "https://arxiv.org/pdf/2609.07442",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f9238kp368ybp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.07442",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.07442"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "A phenomenological approach to direct ${\\rm{K}}^{*}$ production and hadronic medium effects in nucleus-nucleus collisions at high baryon density",
  "title_text": "A phenomenological approach to direct K^* production and hadronic medium effects in nucleus-nucleus collisions at high baryon density",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/f9238kp368ybp",
  "venue": "arXiv",
  "versions": []
}