# LIB2-291 — Superseded cylinder-running proof prompt for the weak angle

- 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 proof prompt proposed obtaining the weak angle from one-loop Peirce-cylinder running.

## Caution

The replacement does not refute all cylinder-running models or derive a completed Z-pole prediction.

## Primary source

Paper 4, §7, Current weak-angle target and precision boundary, PDF p.77: "We therefore carry ϕ−3 as a ∼ 2% structural tree-level target on the electroweak curve, not as a completed Z-pole precision prediction."

## Machine

- url: /library-v2/LIB2-291/
- content_sha256: 640c66b0dce2e9b4c1d8ac96edc809b010c5dd44702d638f77fc9de8651ded8e
- candidate_ids: C2-014

## Freshness

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