The Space–Matter–Motion (RMB) Framework: A Tensorial Effective Field Theory of Motion-Structured Spacetime

This work introduces the Space–Matter–Motion (RMB) framework, proposed by Davide Dellomonaco, as a tensorial effective field theory extending General Relativity in the infrared regime. The theory incorporates structured motion and coherent rotational dynamics as additional sources of spacetime response through a symmetric deformation tensor and an antisymmetric rotational sector. A Lagrangian formulation is presented together with the resulting field equations, conservation structure, limiting regimes, and explicit falsifiability criteria. The framework reduces to General Relativity under local high-screening conditions while allowing effective deviations at galactic and cosmological scales. Numerical validation is not included in this work and will be presented in a dedicated companion study based on reproducible observational datasets.