{
  "abstract": "The first observation of the doubly charmed baryon Ξ_{cc}^{+} is reported through its decay to the Λ_{c}^{+}K^{-}π^{+} final state, with a statistical significance exceeding seven standard deviations. The observation is made using proton-proton collision data collected in 2024 with the LHCb Run 3 detector at a center-of-mass energy of 13.6 TeV, corresponding to a total integrated luminosity of 6.9 fb^{-1}. The Ξ_{cc}^{+} mass is measured to be 3619.97±0.83±0.26_{-1.30}^{+1.90} MeV/c^{2}, where the first uncertainty is statistical, the second is systematic, and the third is due to the unknown Ξ_{cc}^{+} lifetime, which is assumed to lie in the range 15-160 fs with a baseline value of 45 fs. The difference between the masses of the Ξ_{cc}^{+} and Ξ_{cc}^{++} baryons is determined to be -1.77±0.84±0.15_{-1.30}^{+1.90} MeV/c^{2}. This is the first observation of a new particle made with the LHCb Run 3 detector.",
  "abstract_shown": true,
  "affiliations": [
    "Nikhef National Institute for Subatomic Physics",
    "Syracuse University",
    "University of Warwick",
    "Universität Zürich",
    "University of Edinburgh",
    "University of Liverpool",
    "Universidade de Santiago de Compostela",
    "University of Bristol",
    "National Center for Nuclear Research (NCBJ)",
    "University of Glasgow",
    "Uppsala University",
    "Université Paris-Saclay",
    "University of Michigan",
    "Université Clermont Auvergne",
    "INFN Laboratori Nazionali di Frascati",
    "Technische Universität Dortmund",
    "Albert-Ludwigs-Universität Freiburg",
    "Vilnius University",
    "European Organization for Nuclear Research (CERN)",
    "Universidade Federal do Rio de Janeiro (UFRJ)",
    "Peking University",
    "INFN Sezione di Firenze",
    "INFN Sezione di Ferrara",
    "Universidade da Coruña",
    "INFN Sezione di Milano-Bicocca",
    "University of Chinese Academy of Sciences",
    "INFN Sezione di Roma Tor Vergata",
    "Consejo Nacional de Rectores (CONARE)",
    "Aix Marseille University",
    "Institute of Physics",
    "Massachusetts Institute of Technology",
    "Laboratoire Leprince-Ringuet",
    "University of Oxford",
    "Ruprecht-Karls-Universität Heidelberg",
    "Central China Normal University",
    "Ruhr Universitaet Bochum",
    "Centro Brasileiro de Pesquisas Físicas (CBPF)",
    "Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)",
    "University of Manchester",
    "INFN Sezione di Bologna"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 100,
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        0
      ],
      "name": "R. Aaij",
      "orcid": "0000-0003-0533-1952"
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        1
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      "name": "M. Abdelfatah"
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        2
      ],
      "name": "A. S. W. Abdelmotteleb",
      "orcid": "0000-0001-7905-0542"
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    {
      "affs": [
        3
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      "name": "Carlos Abellán Beteta",
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    {
      "affs": [
        4
      ],
      "name": "C. Abellán Beteta",
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        5
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      "name": "T. Ackernley",
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      "name": "A. A. Adefisoye",
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      "name": "B. Adeva",
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      "name": "P. Adlarson",
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      "name": "C. Agapopoulou",
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      "name": "C. Aidala",
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      "name": "K. Carvalho Akiba",
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      "name": "S. Amato",
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      "name": "L. An",
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      "name": "M. Andreotti",
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      "name": "Sergio Andres Estrada",
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      "name": "Alessia Anelli",
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      "name": "D. Ao",
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      "name": "C. Arata",
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      "name": "F. Archilli",
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      "name": "Zaratsyan Areg",
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      "name": "Matteo Argenton",
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      "name": "S. Arguedas Cuendis",
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      "name": "Lisa Arnone",
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      "name": "M. Artuso",
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      "name": "E. Aslanides",
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      ],
      "name": "R. Ataíde Da Silva",
      "orcid": "0009-0005-1667-2666"
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      "name": "M. Atzeni",
      "orcid": "0000-0002-3208-3336"
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      "name": "B. Audurier",
      "orcid": "0000-0001-9090-4254"
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      "name": "Juliette Authier",
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      "name": "D. Bacher",
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      "name": "I. Bachiller",
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      "name": "S. Bachmann",
      "orcid": "0000-0002-1186-3894"
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      "name": "Marie Bachmayer",
      "orcid": "0000-0001-5996-2747"
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      ],
      "name": "John J Back",
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    {
      "affs": [
        34
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      "name": "Z. B. Bai",
      "orcid": "0009-0000-2352-4200"
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      "name": "V. Balagura",
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      ],
      "name": "A Balboni",
      "orcid": "0009-0003-8872-976X"
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    {
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      "name": "W. Baldini",
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        15
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      "name": "Zachary Baldwin",
      "orcid": "0000-0002-8534-0922"
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      "name": "Luca Balzani",
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      "name": "H. Bao",
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      "name": "J. Baptista de Souza Leite",
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  "bibtex": "https://research.draconitic.com/paper/7w0ac0na3237p.bib",
  "cited_by": 22,
  "doi": "10.1103/dmv6-7gdv",
  "fulltext_url": null,
  "id": "7w0ac0na3237p",
  "issns": [
    "0031-9007",
    "1079-7114",
    "1092-0145"
  ],
  "landing_url": "https://doi.org/10.1103/dmv6-7gdv",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
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  "openalex": "W7164035341",
  "pdf_url": null,
  "pmcid": null,
  "pmid": "42503113",
  "published": "2026-06-09",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/7w0ac0na3237p.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:20:45Z",
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      "url": "https://doi.org/10.1103/dmv6-7gdv"
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  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Quantum Chromodynamics and Particle Interactions",
      "subfield": "high-energy"
    }
  ],
  "title": "Observation of the Doubly Charmed Baryon Ξ c c + with the LHCb Run 3 Detector",
  "title_text": "Observation of the Doubly Charmed Baryon Ξ c c + with the LHCb Run 3 Detector",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T13:20:39Z",
  "url": "https://research.draconitic.com/paper/7w0ac0na3237p",
  "venue": "Physical Review Letters",
  "versions": []
}