We show that the inverse fine structure constant admits a convergent structural expansion ^-1 = C + rC - r, T (nc) T (r), C² + r, T (nc) T (r), T (nc+1), C³ - where C = n Ng + r = 11 12 + 5 = 137 is the dimension of the interaction space, n = 11 is the number of independent degrees of freedom per lattice site, Ng = 12 is the number of gauge bosons, r = 5 is the number of independent Noether charges (four Cartan generators plus baryon number), nc = n - d = 7 is the number of compact dimensions (d = 4 being spacetime), and T (k) = k (k+1) /2 denotes the k-th triangular number. This decomposition arises from a vertex tensor product factorization: the interaction space at each lattice site decomposes as V = (C11 Lie (G) 12) Z (U (g) ) ₅, yielding 132 + 5 = 137 independent interaction sectors. The electromagnetic coupling is the reciprocal of this count. Each higher-order correction introduces the next triangular number T (nc + k) in the denominator, producing a rapidly convergent series. The series converges by the twenty-fifth term (corrections fall below 10^-100), yielding ^-1 = 137. 035, 999, 177, 301, 0, which matches the CODATA 2022 value 137. 035, 999, 177 (21) to 0. 014. We tabulate eighty significant figures of the converged value, of which only twelve are currently measured; the remaining digits are forward predictions for next-generation experiments. The same framework predicts the ratios ₛ: W: = 16: 5: 1 from the generator-charge structure of each gauge factor, in agreement with measured values to within a few percent. The integer 137 is not a free parameter but a combinatorial invariant of the Standard Model placed on a four-dimensional lattice, determined entirely by the gauge group structure, the spacetime dimension, and the vertex factorization principle.
Mark Newton (Sat,) studied this question.
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