Overview We introduce FSIG (Formal Structural Information Gravity), a minimal conformal scalar-tensor extension of general relativity. The spacetime metric incorporates a dimensionless scalar field Φ (x) through a structural conformal factor: gμν = exp (−Φ/λ₃*) · g̃μν where λ₃* ≈ 0. 152044 is treated as a phenomenological structural constant, not a fundamental constant of nature. Theoretical Features The framework satisfies the following constraints: Requirement Status GW170817 compatibility (cGW = c) ✓ Satisfied exactly Ghost-free dynamics ✓ No higher-derivative instabilities Weak-field limit ✓ Reduces to GR Binary pulsar tests ✓ Reproduces GR predictions The Einstein-Hilbert action governs the dynamical metric g̃_μν, ensuring that all standard GR vacuum solutions (Schwarzschild, Kerr, gravitational waves) are admitted as Φ = const configurations. Key Prediction: Neutron Transport Enhancement The theory yields a laboratory-testable signature: Neutral particles traversing Φ-inhomogeneous regions experience enhanced transport, quantified by the dimensionless parameter Ξ. Theory Prediction General Relativity ΞGR = 1 (exactly) FSIG Ξ > 1 at the 10⁻⁴ – 10⁻⁵ level This effect is absent in GR and provides a direct falsifiable test at cold-neutron beamlines, independent of astrophysical uncertainties. Explicitly Stated Limitations We emphasize the following open problems: λ₃* lacks a first-principles derivation — its cross-scale appearance is treated as an empirical observation, not a theoretical prediction Microscopic origin of J (x) remains unspecified — a full description of the structural source density requires further work Cosmological applications are preliminary — CMB, BAO, and structure formation have not been rigorously derived Strong-field regime not analyzed — behavior near compact objects requires numerical investigation Related Publications This work builds on previous research: TSTT V3. 3: 10. 5281/zenodo. 17620967 GHZ Experiments V3. 2: 10. 5281/zenodo. 17589109 Stellarator Plasma: 10. 5281/zenodo. 17670783 FSGO: 10. 5281/zenodo. 17710175 Status Preprint — Accompanies submission to Physical Review D Contact: lemissio@gmail. com
Takagi Takayuki (Tue,) studied this question.