{
  "abstract": "Based on $(10.087 \\pm 0.044) \\times 10^{9}~J/ψ$ events collected at the center-of-mass energy $\\sqrt{s} = 3.097$~GeV with the BESIII detector, we search for the charged lepton flavor violating decay $η\\to e^{\\pm}μ^{\\mp}$ through the process $J/ψ\\to γη'$ with $η' \\to π^{+} π^{-} η$. No signal is observed, and an upper limit on the branching fraction is determined to be $\\mathcal{B}(η\\to e^{\\pm}μ^{\\mp}) < 6.8 \\times 10^{-7}$ at the 90\\% confidence level. This result improves the previous best limit by one order of magnitude.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 072012 (2026)",
  "arxiv": "2606.22373",
  "author_total": 712,
  "authors": [
    {
      "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": "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": "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"
    },
    {
      "name": "G. Cibinetto"
    },
    {
      "name": "F. Cossio"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4sg3a4rjpk8ym.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.22373",
  "fulltext_url": null,
  "id": "4sg3a4rjpk8ym",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.22373",
  "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"
    ]
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  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.22373",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4sg3a4rjpk8ym.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:14Z",
      "native_id": "2606.22373",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.22373"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for the charged lepton flavor violating decay $η\\to e^{\\pm}μ^{\\mp}$",
  "title_text": "Search for the charged lepton flavor violating decay η→ e^±μ^∓",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:50Z",
  "url": "https://research.draconitic.com/paper/4sg3a4rjpk8ym",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/h7bx-zj4b",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
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}