P28- Tidal Deformability Rupture in CCEGA: Density Feedback and EOS Exclusion

CCEGA predicts MPA1 (stiff EOS) tidal deformability Λ ≈ 754–879, excluded by GW170817 [70, 580]. This paper explains why: density-dependent coupling G_eff(ρ) = G e^{−ρ/ρ_c} amplifies tidal response with ρ_central. Stiffer EOS → higher central density → exponential growth in δG/G. With ρ_c = 7.4 ρ_nuc: APR4 yields Λ ≈ 376–439 (safe ✓), SLy yields Λ ≈ 468–546 (marginal), MPA1 yields Λ ≈ 754–879 (excluded ✗). No parameter rescues MPA1 without breaking T_bounce or M_max. The framework has no internal mechanism to exclude stiff EOS a priori—it couples to density universally. Result is falsifiable: IR1/O5 will measure Λ(1.4) to σ~50; Einstein Telescope (2035) to σ10."