# LIB2-218 — SL-15: MS-bar charm mass at its self-scale

- class: COMPARATOR · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status NOT_PRINTED · attachment NOT_PRINTED · scorecard tier word none (PDF p.37)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The ledger’s MS-bar charm-mass comparator at the charm self-scale is mc(mc) = 1272.9 ± 4.5 MeV.

## Primary source

Paper 2, §3.6, Charm MS-bar comparator and cross-scheme boundary, PDF p.38: "2026 MS comparator mc (mc ) = 1272.9 ± 4.5 MeV."

## Machine

- url: /library-v2/LIB2-218/
- content_sha256: 4aefec307e8e96a7bb42872bd9a7ed2f64b62ca7ea9642ae6efec2d8192b6df2
- candidate_ids: C2-193

## Freshness

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