{
 "id": "LIB2-288",
 "entry_version": 7,
 "class": "RETIRED",
 "title": "Superseded Cabibbo-squared formula for Vcb",
 "statement": "The archived proof prompt proposed obtaining Vcb from the squared sine of a corrected Cabibbo angle divided by the square root of the golden ratio.",
 "scope": {
  "carrier": null,
  "domain": "The P68 corrected-Cabibbo formula, not the distinct lambda-power assignment of L129.",
  "group": null,
  "hypotheses": [],
  "physical_target": null,
  "quantifier": null,
  "real_form": null
 },
 "source_labels_as_printed": {
  "math_status": null,
  "attachment": null,
  "scorecard_tier_word": null,
  "pdf_page": null
 },
 "house_tier": null,
 "review_state": "PUBLISHED",
 "scientific_status": "RETIRED",
 "evidence_status": [
  {
   "kind": "registry",
   "availability": "shipped"
  }
 ],
 "primary_source": {
  "component": "Appendix B",
  "section": "§B.6, Retained Vcb formula",
  "pdf_page": 162,
  "quote": "|Vcb | 1/(9 7) = 0.041996"
 },
 "caution": "Replacing this historical formula does not select the present physical attachment or the unforced integer in its denominator.",
 "candidate_ids": [
  "C2-010",
  "C2-063"
 ],
 "basis": {
  "pdf_sha256_prefix": "b64ddcd9e16a6dcd",
  "release": "Rev33.1_S369"
 },
 "relationships": [],
 "url": "/library-v2/LIB2-288/",
 "content_sha256": "b7b590373fa19787615d7e3684818d497cd61e822f3f0c900d17d3739497f700",
 "build_stamp": "BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02"
}