{
  "abstract": "The penguin-dominated $B\\toϕK$ decays provide sensitive probes of physics beyond the Standard Model. Interpreting them at increasing experimental precision requires control of doubly Cabibbo-suppressed hadronic contributions. Using a factorization approach, we obtain Standard Model benchmarks for the branching ratios and CP-violating observables, including the hadronic phase shift in $B_d^0\\toϕK_{\\rm S}$. The $B_s^0\\toϕK_{\\rm S}$ channel, in which the corresponding penguin effects are not Cabibbo-suppressed, offers additional insight into these contributions. Comparing the neutral and charged $B\\toϕK$ modes further allows the construction of isospin observables. We discuss their Standard-Model expectations and sensitivity to New Physics in the $I=0$ and $I=1$ sectors. The available data are consistent with the Standard Model, while leaving substantial room for New Physics contributions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.22970",
  "author_total": 3,
  "authors": [
    {
      "name": "Robert Fleischer"
    },
    {
      "name": "Jelle Groot"
    },
    {
      "name": "K. Keri Vos"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/776pz8rymkf52.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.22970",
  "fulltext_url": null,
  "id": "776pz8rymkf52",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.22970",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7214052310",
  "pdf_url": "https://arxiv.org/pdf/2609.22970",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/776pz8rymkf52.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.22970",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.22970"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "CP violation in $B_{(s)}\\toϕK$ decays: Standard Model and isospin-dependent New Physics",
  "title_text": "CP violation in B_(s)→ϕK decays: Standard Model and isospin-dependent New Physics",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/776pz8rymkf52",
  "venue": "arXiv",
  "versions": []
}