# LIB2-131 — The charm bridge remains constituent-anchored and cross-scheme

- class: CLAIM · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status Structural · attachment NOT_PRINTED · scorecard tier word Structural (PDF p.333)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The retained charm bridge mc = (7/3)m_s^const = 1291.9 MeV has the printed +1.49% offset from its MS-bar comparator; no constituent-to-MS conversion uncertainty is supplied.

## Caution

This constituent-anchored comparison does not establish a low-energy mass theorem or a status-setting discrepancy.

## Primary source

Paper 2, §3.6, Charm offset and comparator, PDF p.38: "The charm bridge value mc = 1291.9 MeV lies +1.49% above the PDG 2026 MS comparator mc (mc ) = 1272.9 ± 4.5 MeV."

## Machine

- url: /library-v2/LIB2-131/
- content_sha256: 1c449b540638df9dc0e53525c0309cea8b8ef439ea3c0e03c913646a38a8e283
- candidate_ids: C2-022

## Freshness

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