{
  "abstract": "CKM unitarity triangle constraints are insensitive to New Physics scenarios in which the $b$-column is uniformly rescaled. This is because B physics data over-constrain the angles of the (bd) unitarity triangle, but only calibrate its normalization. We identify this flat direction and derive model-independent constraints on the rescaling. We find that $|\\varepsilon_K|$ already constrains the rescaling at the same level as the direct measurement of the $b$-column normalization, with current data allowing for ${\\cal O}(4\\%)$ deviations. Projected inputs promote the kaon sector to be the leading probe. A toy model employing mixing with a vector-like up-type singlet provides a proof of principle for a possible UV realization.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.13136",
  "author_total": 1,
  "authors": [
    {
      "name": "Avital Dery"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e7px4kwrc7ajn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.13136",
  "fulltext_url": null,
  "id": "e7px4kwrc7ajn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.13136",
  "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-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.13136",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e7px4kwrc7ajn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:22Z",
      "native_id": "2607.13136",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.13136"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "A CKM blind spot: probing $b$-column rescaling with kaons",
  "title_text": "A CKM blind spot: probing b-column rescaling with kaons",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:22Z",
  "url": "https://research.draconitic.com/paper/e7px4kwrc7ajn",
  "venue": "arXiv",
  "versions": []
}