{
  "abstract": "Using a sample of $(10087\\pm44)\\times10^{6}$ $J/ψ$ events collected with the BESIII detector, we investigate the inelastic scattering processes $Λ+p\\toΣ^{0}+p$ and $\\overlineΛ+p\\to\\overlineΣ^{0}+p$, exploiting hyperons from $J/ψ\\toΛ\\overlineΛ$ decays as an effective beam and the beam-pipe materials as targets. The processes $Λ+{}^{9}\\mathrm{Be}\\toΣ^{0}+p+{}^{8}\\mathrm{Li}$ and $\\overlineΛ+{}^{9}\\mathrm{Be}\\to\\overlineΣ^{0}+p+{}^{8}\\mathrm{Li}$ are measured at a hyperon momentum of $1.074~\\mathrm{GeV}/c$, with cross sections of $(10.1\\pm1.4_{\\rm stat}\\pm0.7_{\\rm syst})$ mb and $(1.7\\pm0.6_{\\rm stat}\\pm0.4_{\\rm syst})$ mb, respectively. Under the assumption of surface-dominated hyperon-nucleus scattering, these measurements are used to extract the corresponding proton-target cross sections. Independently, direct measurements using the hydrogen component of the beam-pipe oil yield $(3.2\\pm1.1_{\\rm stat}\\pm0.5_{\\rm syst})$ mb for $Λ+p\\toΣ^{0}+p$ and $(1.5\\pm0.5_{\\rm stat}\\pm0.1_{\\rm syst})$ mb for $\\overlineΛ+p\\to\\overlineΣ^{0}+p$, consistent with the indirect determinations. The combined cross sections are $(4.7\\pm0.7)$ mb and $(1.1\\pm0.3)$ mb, respectively. The $\\overlineΛ+p\\to\\overlineΣ^{0}+p$ signal constitutes the first evidence for anti-hyperon inelastic scattering with baryonic final states, with a significance of $3.1σ$. The pronounced difference between the $Λp$ and $\\overlineΛp$ inelastic scattering cross sections provides new experimental constraints on hyperon-nucleon and anti-hyperon-nucleon interactions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.02584",
  "author_total": 778,
  "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": "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"
    },
    {
      "name": "X. Chu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d33jhm3mptk48.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.02584",
  "fulltext_url": null,
  "id": "d33jhm3mptk48",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.02584",
  "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-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7207807629",
  "pdf_url": "https://arxiv.org/pdf/2609.02584",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d33jhm3mptk48.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2609.02584",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.02584"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Measurement of inelastic scattering $Λ(\\overlineΛ)+p\\toΣ^{0}(\\overlineΣ^{0})+p$ via $e^+e^-\\to J/ψ\\toΛ\\overlineΛ$",
  "title_text": "Measurement of inelastic scattering Λ(Λ̅)+p→Σ^0(Σ̅^0)+p via e^+e^-→ J/ψ→ΛΛ̅",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/d33jhm3mptk48",
  "venue": "arXiv",
  "versions": []
}