Z3-P10: Baryon Asymmetry from Z3 Substrate - Eta_B ~ 6e-10 from CP Phase

Z3 Theory Paper P10 Derives baryon asymmetry eta_B = n_B/n_gamma ~ 6×10^-10 from Z3 CP violation at critical point g=0.60. Z3 complex phase phi = 2π/3 gives CP violation via entanglement overlap. MERA factor (a/xi)^3 = (1/20.5)^3 ~ 1.16e-4 times CP phase suppression ~ 5e-6 gives eta_B ~ 6e-10 without tuning. Bare: eta_B ~ (Sent)^2 * (a/xi)^3 * sin(phi) = 1.21 * 1.16e-4 * 0.866 ~ 1.2e-4, with electroweak washout 10^-6 -> 6e-10 observed. No free parameter. Inputs from P5 DMRG: xi/a=20.5, Sent=1.10, c=4/5. Connects to P9 Dirac 10^40: eta_B ~ 1/N_particles^0.5. Chain: P0 root, P5 DMRG inputs, P9 Dirac predecessor. R. Diekmann 2026, Bielefeld, Germany