Twin-Barrier Theory of Gravity presents a higher-dimensional braneworld framework in which each massive particle is modeled as a dual mass configuration distributed across a visible and a twin brane in a warped 5D spacetime. Within this geometry, the graviton zero mode localizes on the visible brane and reproduces the effective 4D Newtonian interaction.
A closed geometric derivation of Newton’s gravitational constant is obtained through UV/IR closure relations and radion stabilization, yielding a zero-free-parameter prediction consistent with the observed value of (G). The framework further provides natural interpretations of dark-sector metastability, black-hole collapse, and the energy barrier governing visible–twin barrier transitions.