# LIB2-072 — The two CKM beta readouts remain internally inconsistent

- class: CLAIM · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status NOT_PRINTED · attachment NOT_PRINTED · scorecard tier word none (PDF p.53)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The suite reports βrecon = 23.44° from its standard CKM assembly, versus 22.5° from the separate half-angle construction, leaving an internal discrepancy of 0.94°.

## Caution

Neither choosing the closer external comparison nor enforcing unitarity resolves the missing |Vtd| readout.

## Primary source

Paper 3, §2.2, Internal consistency note, PDF p.55: "A CKM matrix constructed from those four elements under the standard parametrisation gives βrecon = 23.44◦ , not 22.5◦ ."

## Machine

- url: /library-v2/LIB2-072/
- content_sha256: f1761ddeb70033e47626a0513f1f163f6c00fa97818e9827bb08ae72a21e19f8
- candidate_ids: C2-066

## Freshness

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