# LIB2-294 — Superseded torsion-corrected Cabibbo–Weinberg formula

- class: RETIRED · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status None · attachment None · scorecard tier word none (PDF p.None)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The archived Cabibbo proof prompt proposed an arctangent of the golden weak-angle expression followed by a torsion subtraction.

## Caution

Replacing this formula neither selects the current first-row route nor solves the weak-angle matching problem.

## Primary source

Paper 3, §2, Kernel-line exact-framework Cabibbo readout, PDF p.49: "the canonical current value is |Vus | = 0.225256 √ (the exact framework angle arctan( 3/ϕ2 ) = 33.4880◦ , printed from the kernel line s1162;"

## Machine

- url: /library-v2/LIB2-294/
- content_sha256: faee1c9785c83d10177e2f1fe58e326fee63ccf134152b7de34c300b69c937a2
- candidate_ids: C2-009 C2-062

## Freshness

- BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02
- Declared volatile fields (R36): BUILD_STAMP