{
  "abstract": "A bstract : A search for charge-parity ( CP ) violation in the Cabibbo-suppressed D ⁺ → ϕπ ⁺ decay is presented, using proton-proton collision data corresponding to an integrated luminosity of 6 fb − 1 , collected at a centre-of-mass energy of 13 TeV with the LHCb detector during Run 2. An abundant sample of $$ {D}^{+}\\to {K}_{\\mathrm{S}}^0{\\pi}^{+} $$ D + → K S 0 π + decays is employed to correct for asymmetries arising from the production of the charmed meson and from detection effects associated with the charged pion accompanying the ϕ meson. Asymmetries induced by interference of multiple processes, such as neutral kaon mixing, regeneration of neutral kaons, and interference between the Cabibbo-favoured $$ {D}^{+}\\to {\\overline{K}}^0{\\pi}^{+} $$ D + → K ¯ 0 π + and the doubly Cabibbo-suppressed D ⁺ → K ⁰ π ⁺ decay, are subtracted. The direct CP asymmetry in the D ⁺ → ϕπ ⁺ decay is measured to be $$ {a}_{CP}\\left({D}^{+}\\to \\phi {\\pi}^{+}\\right)=\\left(0.1\\pm 4.9\\left(\\mathrm{stat}\\right)\\pm 2.4\\left(\\mathrm{syst}\\right)\\right)\\times {10}^{-4}. $$ a CP D + → ϕ π + = 0.1 ± 4.9 stat ± 2.4 syst × 10 − 4 .\n\nFor the first time at a hadron collider, the modulus of the ratio and the relative strong phase of the D ⁺ → K ⁰ π ⁺ to $$ {D}^{+}\\to {\\overline{K}}^0{\\pi}^{+} $$ D + → K ¯ 0 π + decay amplitudes are also investigated. Two-dimensional confidence intervals are reported for these parameters.",
  "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)",
    "Uppsala University",
    "Université Paris-Saclay, CNRS/IN2P3, IJCLab",
    "University of Michigan",
    "Université Clermont Auvergne, CNRS/IN2P3, LPC",
    "INFN Laboratori Nazionali di Frascati",
    "Fakultät Physik, Technische Universität Dortmund",
    "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",
    "Université Paris-Saclay, Centre d’Etudes de Saclay (CEA), IRFU",
    "INFN Sezione di Roma Tor Vergata",
    "Consejo Nacional de Rectores (CONARE)",
    "Aix Marseille Univ, CNRS/IN2P3, CPPM",
    "Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL)",
    "Massachusetts Institute of Technology",
    "Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris",
    "University of Oxford",
    "Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg",
    "Central China Normal University",
    "Ruhr Universitaet Bochum, Fakultaet f. Physik und Astronomie",
    "Centro Brasileiro de Pesquisas Físicas (CBPF)",
    "Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)",
    "University of Manchester"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1130,
  "authors": [
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  "bibtex": "https://research.draconitic.com/paper/9re47v3k9v37q.bib",
  "cited_by": 0,
  "doi": "10.1007/jhep10(2026)256",
  "fulltext_url": null,
  "id": "9re47v3k9v37q",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/article/10.1007/JHEP10(2026)256",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
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  "native_subjects": [],
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  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP10(2026)256.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/9re47v3k9v37q.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T12:21:02Z",
      "native_id": "10.1007/jhep10(2026)256",
      "source": "crossref",
      "url": "https://link.springer.com/article/10.1007/JHEP10(2026)256"
    }
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  "subjects": [
    {
      "field": "physics",
      "origin": "issn:1029-8479",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for CP violation in D+ → ϕπ+ decays",
  "title_text": "Search for CP violation in D+ → ϕπ+ decays",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T00:20:37Z",
  "url": "https://research.draconitic.com/paper/9re47v3k9v37q",
  "venue": "Journal of High Energy Physics",
  "versions": [
    {
      "doi": "10.48550/arxiv.2607.20276",
      "pid": "efvndy2eg27fg",
      "relation": "preprint",
      "title": "Search for $C\\!P$ violation in $D^+ \\to ϕπ^+$ decays",
      "venue": "arXiv"
    }
  ]
}