# PAPER_1198 UPDATE — Multi-Derivation Session Extensions

**Original:** PAPER_1198 ρ_vac SCm Derivation & Particle Physics Proof Set
**Update:** Session June 2026
**Status:** Update

## Session Extensions

Closed forms confirmed in calculator:
- Λ_QCD = D_crit²/π = **215.2 MeV** (1.29% vs 218)
- α_s(M_Z) = 0.1179 (anchored)
- V_us CKM, Δm²_21/31 neutrino mass splittings
- See PAPER_1219 Reading B for Riemann projection
- See PAPER_1217 for mass ratios
