{
  "abstract": "We report the observation of significant double-$s\\bar{s}$ production in the $e^+e^-$ continuum, based on the measurement of prompt $ϕ$ mesons produced in association with hadrons containing an $s$ quark or an $s\\bar{s}$ pair. In an analysis of $e^+e^-$ collision data collected by the BESIII experiment at $\\sqrt{s}=3.08~\\textrm{GeV}$, the ratio $σ(e^+e^- \\to ϕ s\\bar{s}+\\textrm{anything}) / σ(e^+e^-\\rightarrowϕ+\\textrm{anything})$ is determined to be $(40.4\\pm1.7_{\\rm stat.}\\pm1.5_{\\rm syst.})\\%$ by detecting and measuring $e^+e^-\\toϕ+ X(s\\bar{s})$, where $X(s\\bar{s})$ denotes an $η$ meson, an $η^{\\prime}$ meson, or one of the strange-meson pairs $K^+K^-$, $K^+K^{*-}$, $K^-K^{*+}$, $K^0\\bar{K}^{0}$, and $K^0\\bar{K}^{*0}+\\textrm{c.c.}$. The level of double-$s\\bar{s}$ production is in line with the double-$c\\bar{c}$ production reported by the Belle and \\babar\\ collaborations, for which theoretical calculations predict lower rates. The experimental measurement of double $s\\bar{s}$ production at BESIII can shed light on the understanding of quark hadronization and QCD.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.20154",
  "author_total": 783,
  "authors": [
    {
      "name": "BESIII Collaboration"
    },
    {
      "name": "M. Ablikim"
    },
    {
      "name": "M. N. Achasov"
    },
    {
      "name": "P. Adlarson"
    },
    {
      "name": "X. C. Ai"
    },
    {
      "name": "C. S. Akondi"
    },
    {
      "name": "R. Aliberti"
    },
    {
      "name": "A. Amoroso"
    },
    {
      "name": "Q. An"
    },
    {
      "name": "Y. H. An"
    },
    {
      "name": "M. S. Anderson"
    },
    {
      "name": "Y. Bai"
    },
    {
      "name": "O. Bakina"
    },
    {
      "name": "H. R. Bao"
    },
    {
      "name": "X. L. Bao"
    },
    {
      "name": "M. Barbagiovanni"
    },
    {
      "name": "V. Batozskaya"
    },
    {
      "name": "K. Begzsuren"
    },
    {
      "name": "N. Berger"
    },
    {
      "name": "M. Berlowski"
    },
    {
      "name": "M. B. Bertani"
    },
    {
      "name": "D. Bettoni"
    },
    {
      "name": "F. Bianchi"
    },
    {
      "name": "E. Bianco"
    },
    {
      "name": "A. Bortone"
    },
    {
      "name": "I. Boyko"
    },
    {
      "name": "R. A. Briere"
    },
    {
      "name": "A. Brueggemann"
    },
    {
      "name": "D. Cabiati"
    },
    {
      "name": "H. Cai"
    },
    {
      "name": "M. H. Cai"
    },
    {
      "name": "X. Cai"
    },
    {
      "name": "A. Calcaterra"
    },
    {
      "name": "G. F. Cao"
    },
    {
      "name": "N. Cao"
    },
    {
      "name": "S. A. Cetin"
    },
    {
      "name": "X. Y. Chai"
    },
    {
      "name": "J. F. Chang"
    },
    {
      "name": "T. T. Chang"
    },
    {
      "name": "G. R. Che"
    },
    {
      "name": "Y. Z. Che"
    },
    {
      "name": "C. H. Chen"
    },
    {
      "name": "Chao Chen"
    },
    {
      "name": "G. Chen"
    },
    {
      "name": "H. S. Chen"
    },
    {
      "name": "H. Y. Chen"
    },
    {
      "name": "M. L. Chen"
    },
    {
      "name": "S. J. Chen"
    },
    {
      "name": "S. M. Chen"
    },
    {
      "name": "T. Chen"
    },
    {
      "name": "W. Chen"
    },
    {
      "name": "X. R. Chen"
    },
    {
      "name": "X. T. Chen"
    },
    {
      "name": "X. Y. Chen"
    },
    {
      "name": "Y. B. Chen"
    },
    {
      "name": "Y. Q. Chen"
    },
    {
      "name": "Z. K. Chen"
    },
    {
      "name": "J. Cheng"
    },
    {
      "name": "L. N. Cheng"
    },
    {
      "name": "S. K. Choi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6eyyfwcp9d8fn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20154",
  "fulltext_url": null,
  "id": "6eyyfwcp9d8fn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20154",
  "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-ex"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7213577317",
  "pdf_url": "https://arxiv.org/pdf/2609.20154",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6eyyfwcp9d8fn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20154",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20154"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Observation of double $s\\bar{s}$ production in $e^+e^-$ collision at $\\sqrt{s} = 3.08~\\textrm{GeV}$",
  "title_text": "Observation of double ss̅ production in e^+e^- collision at √s = 3.08 GeV",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/6eyyfwcp9d8fn",
  "venue": "arXiv",
  "versions": []
}