{
  "abstract": "We report the first RHIC measurements of $v_{0}(p_\\mathrm{T})$ in Au+Au collisions at $\\sqrt{s_\\mathrm{NN}}=7.7$--$200$ GeV and O+O collisions at $\\sqrt{s_\\mathrm{NN}}=200$ GeV. The integral fluctuation $v_0$ follows a common $N_{\\rm ch}$ dependence in large and small systems, suggesting that the fluctuation magnitude is predominantly controlled by event-by-event fluctuations of the initial transverse size. The normalized response $v_0(p_\\mathrm{T})/v_0$ factorizes across centralities and systems, revealing a universal hydrodynamic response $κ_0(p_\\mathrm{T})/κ_0$ largely independent of the fluctuation amplitude. Identified-hadron mass ordering and viscous model comparisons demonstrate sensitivity to bulk viscosity ($ζ/s$). These results establish $v_0(p_\\mathrm{T})$ as a probe of the radial hydrodynamic response, collectivity across large and small collision systems, and QGP transport properties.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.00190",
  "author_total": 1,
  "authors": [
    {
      "name": "Zaining Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ez76t0468kt0w.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.00190",
  "fulltext_url": null,
  "id": "ez76t0468kt0w",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.00190",
  "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",
      "nucl-ex"
    ],
    [
      "openalex",
      "3106|High-Energy Particle Collisions Research"
    ]
  ],
  "openalex": "W7172429933",
  "pdf_url": "https://arxiv.org/pdf/2608.00190",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ez76t0468kt0w.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2608.00190",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.00190"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Collision energy and system size dependence of $p_{\\mathrm{T}}$-differential radial flow fluctuations $v_{0}(p_{\\mathrm{T}})$ at RHIC",
  "title_text": "Collision energy and system size dependence of p_T-differential radial flow fluctuations v_0(p_T) at RHIC",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/ez76t0468kt0w",
  "venue": "arXiv",
  "versions": []
}