{
  "abstract": "A search for charge-parity ($C\\!P$) violation in the Cabibbo-suppressed $D^+ \\to ϕπ^+$ decay is presented, using proton-proton collision data corresponding to an integrated luminosity of $6\\text{ fb}^{-1}$, collected at a centre-of-mass energy of $13\\text{ TeV}$ with the LHCb detector during Run 2. An abundant sample of $D^+ \\to K_{\\rm S}^0 π^+$ 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 $D^+ \\to \\overline{K}^0 π^+$ and the doubly Cabibbo-suppressed $D^+ \\to {K}^0 π^+$ decay, are subtracted. The direct $C\\!P$ asymmetry in the $D^+ \\to ϕπ^+$ decay is measured to be \\begin{equation*} a_{C\\!P}(D^+ \\to ϕπ^+) = \\left(0.1 \\pm 4.9\\text{ (stat)} \\pm 2.4\\text{ (syst)} \\right)\\times 10^{-4}. \\end{equation*} For the first time at a hadron collider, the modulus of the ratio and the relative strong phase of the $D^+ \\to {K}^0 π^+$ to $D^+ \\to \\overline{ K}^0 π^+$ decay amplitudes are also investigated. Two-dimensional confidence intervals are reported for these parameters.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: JHEP 10 (2026) 256",
  "arxiv": "2607.20276",
  "author_total": 1130,
  "authors": [
    {
      "name": "LHCb collaboration"
    },
    {
      "name": "R. Aaij"
    },
    {
      "name": "M. Abdelfatah"
    },
    {
      "name": "A. S. W. Abdelmotteleb"
    },
    {
      "name": "C. Abellan Beteta"
    },
    {
      "name": "F. Abudinén"
    },
    {
      "name": "T. Ackernley"
    },
    {
      "name": "A. A. Adefisoye"
    },
    {
      "name": "B. Adeva"
    },
    {
      "name": "M. Adinolfi"
    },
    {
      "name": "P. Adlarson"
    },
    {
      "name": "C. Agapopoulou"
    },
    {
      "name": "C. A. Aidala"
    },
    {
      "name": "S. Akar"
    },
    {
      "name": "K. Akiba"
    },
    {
      "name": "P. Albicocco"
    },
    {
      "name": "J. Albrecht"
    },
    {
      "name": "R. Aleksiejunas"
    },
    {
      "name": "F. Alessio"
    },
    {
      "name": "P. Alvarez Cartelle"
    },
    {
      "name": "S. Amato"
    },
    {
      "name": "J. L. Amey"
    },
    {
      "name": "Y. Amhis"
    },
    {
      "name": "L. An"
    },
    {
      "name": "L. Anderlini"
    },
    {
      "name": "M. Andersson"
    },
    {
      "name": "P. Andreola"
    },
    {
      "name": "M. Andreotti"
    },
    {
      "name": "S. Andres Estrada"
    },
    {
      "name": "A. Anelli"
    },
    {
      "name": "D. Ao"
    },
    {
      "name": "C. Arata"
    },
    {
      "name": "F. Archilli"
    },
    {
      "name": "Z. Areg"
    },
    {
      "name": "M. Argenton"
    },
    {
      "name": "S. Arguedas Cuendis"
    },
    {
      "name": "L. Arnone"
    },
    {
      "name": "M. Artuso"
    },
    {
      "name": "E. Aslanides"
    },
    {
      "name": "R. Ataíde Da Silva"
    },
    {
      "name": "M. Atzeni"
    },
    {
      "name": "B. Audurier"
    },
    {
      "name": "J. A. Authier"
    },
    {
      "name": "D. Bacher"
    },
    {
      "name": "I. Bachiller Perea"
    },
    {
      "name": "S. Bachmann"
    },
    {
      "name": "M. Bachmayer"
    },
    {
      "name": "J. J. Back"
    },
    {
      "name": "Z. B. Bai"
    },
    {
      "name": "V. Balagura"
    },
    {
      "name": "A. Balboni"
    },
    {
      "name": "W. Baldini"
    },
    {
      "name": "Z. Baldwin"
    },
    {
      "name": "L. Balzani"
    },
    {
      "name": "H. Bao"
    },
    {
      "name": "J. Baptista de Souza Leite"
    },
    {
      "name": "C. Barbero Pretel"
    },
    {
      "name": "M. Barbetti"
    },
    {
      "name": "I. R. Barbosa"
    },
    {
      "name": "R. J. Barlow"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/efvndy2eg27fg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.20276",
  "fulltext_url": null,
  "id": "efvndy2eg27fg",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.20276",
  "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"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7170184868",
  "pdf_url": "https://arxiv.org/pdf/2607.20276",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/efvndy2eg27fg.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:24Z",
      "native_id": "2607.20276",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.20276"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for $C\\!P$ violation in $D^+ \\to ϕπ^+$ decays",
  "title_text": "Search for C P violation in D^+ → ϕπ^+ decays",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:35Z",
  "url": "https://research.draconitic.com/paper/efvndy2eg27fg",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1007/jhep10(2026)256",
      "pid": "9re47v3k9v37q",
      "relation": "published-as",
      "title": "Search for CP violation in D+ → ϕπ+ decays",
      "venue": "Journal of High Energy Physics"
    }
  ]
}