Closes Problem A of the OOB two-problem split for neutrino masses: the absolute scale that sets m_ν₃ ≈ 50 meV. CCLII solved Problem B (Δm² ratio + PMNS mixing angles) via the Class III Gudermannian blend at framework angles. CCLIII closes the scale by recognizing that neutrino mass in OOB arises from small edge deformity on a Fano edge causing brane deceleration when the deformed mode is exposed to the bulk Higgs vev (Paper V: mass as focal deceleration). This is the standard SM Dirac Yukawa picture m = y · v/√2, with the framework supplying y from G₂ root closure: y_ν₃ = α⁶· (6/π) = α⁶·12/ (2π), where α⁶ is the Fano-sextic suppression (six non-e₇ nodes traversed by a G₂ singlet under CXLIX), 12 is the full G₂ root count (Paper L), and 1/ (2π) is loop-phase closure. Gives m_ν₃ = 50. 166 meV, matching √Δm²ₐtm at 0. 3%. Sub-leading channels give m_ν₂ = 8. 684 meV (matching √Δm²₂₁ at 0. 3%) and predicted m_ν₁ = 0. 507 meV. Δm²₂₁ predicted 7. 52×10⁻⁵ eV² vs JUNO 7. 50×10⁻⁵ (+0. 13σ) ; Δm²₃₁ = 2. 52×10⁻³ eV² (+0. 7%). Σm_ν = 59. 36 meV testable at CMB-S4 + DESI by ~2030. Independent consistency check vs CCLII Gudermannian-blend ratio at 0. 9%. m_β = 8. 90 meV (below KATRIN-V) ; m_ββ ∈ 2. 08, 4. 25 meV (below LEGEND-1000). Normal hierarchy structurally mandatory. Together with CCLII, CCLIII closes the neutrino sector at zero free parameters. Part of the One-Octonion Brane-Bulk Framework series. Anchor DOI: 10. 5281/zenodo. 19120873. Community: one-octonion-brane-bulk. Author: Bharathi Dasan Jagadeesan, M. D. , University of Minnesota. ORCID: 0000-0002-1143-941X.
Bharathi Jagadeesan (Sat,) studied this question.