Positronium Diffraction as Laboratory Realisation of the H⁺ H Brane Structure Nagata, Mikami, Zafar, and Nagashima (Nat. Commun. 17, 1159, 2026) report the first

Nagata, Mikami, Zafar, and Nagashima (Nat. Commun. 17, 1159, 2026) report the first observation of positronium (Ps) diffraction through graphene, confirming Ps acts as a single quantum entity with de Broglie wavelength λ_Ps = λ_e/2. We show this result has six deep connections to the One-Octonion Brane-Bulk framework. Most fundamentally, positronium is H⁺ H in miniature: the electron (e ) belongs to the H matter sector and the positron (e ) to the ⊕ ⁻ ⁻ ⁻ ⁺ H antimatter sector. The Born amplitude cancellation — which suppresses Ps elastic diffraction ⁺ by a factor ε_Ps/ε_e ≈ 0.067 ≈ f_bulk − is the atomic-scale analogue of the baryon asymmetry δM/M = 6.1 × 10 ¹ : both arise from near-perfect H /H amplitude cancellation broken at ⁻ ⁰ ⁺ ⁻ second order by octonionic non-associativity. The diffraction peak at r = 8.1 mm (not 16.2 mm) confirms = H H is an undivided structure. 𝕆 ⁺ ⊕ ⁻ 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.