Scalar Coherence Theory: Unified Extended Framework (SCT–UEF 2.0): From Coherent Structure Formation to Black Hole Collapse

Scalar Coherence Theory: Unified Extended Framework (SCT–UEF 2.0) is an exploratory phenomenological framework that investigates whether a vacuum-equilibrium coherence field (Q) can contribute additional gravitational effects beyond the pure baryonic component. The framework introduces Q as a scalar coherence field sourced by baryonic structure and proposes that gradients of Q may influence galactic dynamics. A candidate effective action principle and candidate field equation are presented, together with a phenomenological formulation for galaxy rotation curves. The framework is evaluated using a combined sample of 438 galaxies from SPARC, THINGS, LITTLE THINGS, and WALLABY. Within the analyzed datasets, models including a non-zero coherence term provide improved rotation-curve fits relative to a pure baryonic baseline. Independent validation through weak-lensing observations, external galaxy samples, and direct comparison with established models remains necessary. SCT–UEF is presented as an exploratory and testable research program rather than a completed physical theory. Several elements, including the proposed action principle, field equation, coherence-driven phase transitions, and black-hole coherence-loss interpretation, remain candidate formulations requiring further theoretical and observational investigation.