# LIB2-271 — Superseded pi-weighted prefactor formula for the bottom mass

- 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 numerical bottom-mass prompt proposed the prefactor sqrt(3)·r_23/42 multiplied by (π/2)^{2/3}.

## Caution

The replacement is not a re-evaluation of the archived prefactor and does not supply the missing scheme-matched physical bridge.

## Primary source

Paper 2, §3.6, Current bottom boundary value and offset, PDF p.38: "The mb row must be quoted with its offset: mb = (7/3)mτ = 4146 MeV against PDG 2026 mb (mb ) = 4186 ± 6 MeV is −0.95% and dcmp = −6.64 (cross-scheme, no status; full precision, Rev32.9)."

## Machine

- url: /library-v2/LIB2-271/
- content_sha256: 702044def88aed909933a653fd9585284f45953c6e4cd74de08d0baf613cff24
- candidate_ids: C2-021

## Freshness

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