{
  "abstract": "The first search for the beauty baryon decays $Ξ_{b}^{0} \\to Ξ^{0} J/ψ$ and $Ξ_{b}^{0} \\to Ξ^{0} ψ(2S)$ is presented using the proton-proton collision dataset collected by the LHCb experiment between 2016 and 2018, corresponding to an integrated luminosity of $5.4\\,\\mathrm{fb}^{-1}$. The first observation of the decay $Ξ_{b}^{0} \\to Ξ^{0} J/ψ$ is reported and evidence of the decay $Ξ_{b}^{0} \\to Ξ^{0} ψ(2S)$ is presented. The $Ξ^{0}$ hyperon is fully reconstructed for the first time at an LHC experiment, which is achieved using the $Ξ^{0} \\to Λπ^{0}$ decay. The ratio of the branching fractions is measured as $\\frac{\\cal{B}(Ξ_{b}^{0} \\to Ξ^{0} ψ(2S))}{\\cal{B}(Ξ_{b}^{0} \\to Ξ^{0} J/ψ)} = 0.59 \\pm 0.19 \\text{(stat)} \\pm 0.04 \\text{(syst)}$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.15251",
  "author_total": 1188,
  "authors": [
    {
      "name": "Roel Aaij"
    },
    {
      "name": "Mohammed Abdelfatah"
    },
    {
      "name": "Ahmed Sameh Wagih Abdelmotteleb"
    },
    {
      "name": "Carlos Abellan Beteta"
    },
    {
      "name": "Fernando Jesus Abudinén"
    },
    {
      "name": "Thomas Ackernley"
    },
    {
      "name": "Ayomide Matthew Adefisoye"
    },
    {
      "name": "Bernardo Adeva"
    },
    {
      "name": "Marco Adinolfi"
    },
    {
      "name": "Patrik Harri Adlarson"
    },
    {
      "name": "Christina Agapopoulou"
    },
    {
      "name": "Christine Angela Aidala"
    },
    {
      "name": "Simon Akar"
    },
    {
      "name": "Kazuyoshi Akiba"
    },
    {
      "name": "Hussain Hassan A Al Saleh"
    },
    {
      "name": "Pietro Albicocco"
    },
    {
      "name": "Johannes Albrecht"
    },
    {
      "name": "Ramunas Aleksiejunas"
    },
    {
      "name": "Federico Alessio"
    },
    {
      "name": "Paula Alvarez Cartelle"
    },
    {
      "name": "Sandra Amato"
    },
    {
      "name": "Jake Lewis Amey"
    },
    {
      "name": "Yasmine Amhis"
    },
    {
      "name": "Zachariah Benjamin Amos"
    },
    {
      "name": "Liupan An"
    },
    {
      "name": "Lucio Anderlini"
    },
    {
      "name": "Pasquale Andreola"
    },
    {
      "name": "Mirco Andreotti"
    },
    {
      "name": "Sergio Andres Estrada"
    },
    {
      "name": "Alessia Anelli"
    },
    {
      "name": "Dong Ao"
    },
    {
      "name": "Carolina Arata"
    },
    {
      "name": "Flavio Archilli"
    },
    {
      "name": "Zaratsyan Areg"
    },
    {
      "name": "Matteo Argenton"
    },
    {
      "name": "Sergio Arguedas Cuendis"
    },
    {
      "name": "Lisa Arnone"
    },
    {
      "name": "Marina Artuso"
    },
    {
      "name": "Elie Aslanides"
    },
    {
      "name": "Rita Ataíde da Silva"
    },
    {
      "name": "Michele Atzeni"
    },
    {
      "name": "Benjamin Audurier"
    },
    {
      "name": "Juliette Authier"
    },
    {
      "name": "David Bacher"
    },
    {
      "name": "Irene Bachiller Perea"
    },
    {
      "name": "Sebastian Bachmann"
    },
    {
      "name": "Marie Bachmayer"
    },
    {
      "name": "John Back"
    },
    {
      "name": "Maoze Bai"
    },
    {
      "name": "Ziyu Bai"
    },
    {
      "name": "Vladislav Balagura"
    },
    {
      "name": "Anna Balboni"
    },
    {
      "name": "Wander Baldini"
    },
    {
      "name": "Zachary Baldwin"
    },
    {
      "name": "Luca Balzani"
    },
    {
      "name": "Haoran Bao"
    },
    {
      "name": "Juan Baptista de Souza Leite"
    },
    {
      "name": "Carlos Javier Barbero Pretel"
    },
    {
      "name": "Matteo Barbetti"
    },
    {
      "name": "Ivanildo Rui Barbosa"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/72ppt2c2tmycc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.15251",
  "fulltext_url": null,
  "id": "72ppt2c2tmycc",
  "issns": [],
  "landing_url": "https://hal.science/hal-05759411v1",
  "language": "en",
  "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": [
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      "hep-ex"
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    ],
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      "openalex",
      "3106|Particle physics theoretical and experimental studies"
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  "openalex": "W7213267054",
  "pdf_url": "https://arxiv.org/pdf/2609.15251",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/72ppt2c2tmycc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "hal-05759411",
      "source": "hal",
      "url": "https://hal.science/hal-05759411v1"
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      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.15251",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.15251"
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  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Observation of $Ξ_{b}^{0} \\to Ξ^{0} J/ψ$ and evidence for $Ξ_{b}^{0} \\to Ξ^{0} ψ(2S)$ decays",
  "title_text": "Observation of Ξ_b^0 → Ξ^0 J/ψ and evidence for Ξ_b^0 → Ξ^0 ψ(2S) decays",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/72ppt2c2tmycc",
  "venue": "HAL",
  "versions": []
}