# LIB2-292 — Superseded electromagnetic-subtraction formula for the weak angle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 weak-angle proof prompt proposed an electromagnetic subtraction from the golden tree target as a one-loop correction.

## Caution

The current structural target is not a completed radiative prediction, and the replacement does not exclude all electromagnetic corrections.

## 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/LIB2-292/
- content_sha256: 669902cfadee67974a9941d4ff88e06d93500eee42454e0700305001af0b57f6
- candidate_ids: C2-014

## Freshness

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