{
  "abstract": "We study $e^{+}e^{-} \\to J/ψ+η_c+X$ at next-to-leading order (NLO) in $α_s$ within the nonrelativistic QCD (NRQCD) framework to assess the color-octet (CO) mechanism at low energies. QCD corrections significantly enhance both color-singlet (CS) and CO leading-order results, with non-negligible QED-diagram contributions to the CS channel. At $Υ(4S)$, CO terms increase the inclusive cross section by $20\\%$--$30\\%$, and the enhancement grows rapidly with $\\sqrt{s}$, yielding an energy dependence distinct from CS predictions and providing a sensitive test of NRQCD. Including $ψ(2S)$ feed-down further amplifies the NRQCD prediction by about $40\\%$ at $Υ(4S)$. With Belle's reconstruction of $J/ψ\\to μ^+μ^-$ and six $η_c$ decay channels, the process shows promising potential for observation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.09590",
  "author_total": 3,
  "authors": [
    {
      "name": "Zhan Sun"
    },
    {
      "name": "Shu-Jian Qi"
    },
    {
      "name": "Ying-Zhao Jiang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/88wzxkqn02bwv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09590",
  "fulltext_url": null,
  "id": "88wzxkqn02bwv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.09590",
  "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|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7212106804",
  "pdf_url": "https://arxiv.org/pdf/2609.09590",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/88wzxkqn02bwv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.09590",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09590"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Inclusive productions of $J/ψ+η_c$ in $e^{+}e^{-}$ annihilation at Belle",
  "title_text": "Inclusive productions of J/ψ+η_c in e^+e^− annihilation at Belle",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/88wzxkqn02bwv",
  "venue": "arXiv",
  "versions": []
}