# LIB2-128 — The light-quark constituent proxy uses the fitted hadronic anchor

- 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.334)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The retained light-quark constituent relation is m_u^const ≈ m_d^const ≈ ΛG2 ϕ^(1/2) ≈ 331 MeV.

## Caution

This constituent proxy is not directly comparable to current-quark masses and does not derive the hadronic anchor.

## Primary source

Paper 2, §3.4, Equation (19): constituent relation, PDF p.36: "mconst u ≈ mconst d ≈ ΛG2 φ1/2 ≈ 331 MeV,"

## Machine

- url: /library-v2/LIB2-128/
- content_sha256: 0a85437081438593bbac3e72e180f41a9e513a5971764e978e5a9bf4fed2b84b
- candidate_ids: C2-023

## Freshness

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