Higgs Quartic Coupling from AME(4,6): λ_H = 1/8

Note (v2, April 20 2026): The prediction λ_H = 1/(d²_adj - 1) = 1/8 gives m_H = v√(λ_H/2) ≈ 123.1 GeV, which is 3.2% below the measured value m_H = 125.25 ± 0.17 GeV (1.6% from the pole mass). This is a tree-level prediction; radiative corrections (particularly the top quark loop) are expected to shift the effective quartic coupling upward, potentially improving agreement.

Original abstract: We derive the Higgs quartic coupling λ_H = 1/8 from the quantum dimension of the adjoint anyon in SU(3)_3, predicting the Higgs boson mass with 3.2% accuracy.