# LIB2-310 — Derive the scheme-specific weak-angle matching bridge

- class: OPEN · review_state: IN_REVIEW · 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

Can the structural weak-angle target be connected to the Z-pole observable by a first-principles matching scale or a completed radiative bridge?

## Caution

No matching scale is selected here, and the structural target is not promoted to an electroweak precision prediction.

## Primary source

Paper 4, §7, Running-scale and radiative-shift boundary, PDF p.77: "as a running value the matching scale µ⋆ is scheme-dependent and undetermined; (ii) as a tree value bridged by standard electroweak radiative corrections, the required shift is not uniquely fixed"

## Machine

- url: /library-v2/LIB2-310/
- content_sha256: c9006a89f3b29b5ff5a5f2a7bd7d04f167a12171f71e60b54b5353f98ece19a4
- candidate_ids: C2-014

## Freshness

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