A Screened Coherence-Field Phenomenology for Galactic Rotation Curves: Preliminary Tests of TDCAED with SPARC-LTG Data

This preliminary research manuscript presents a phenomenological test of the TDCAED-Sigmoid beta=2 model applied to galactic rotation curves using SPARC-LTG data. The model introduces a screened coherence-field contribution to the baryonic velocity profile and compares its performance against NFW, Burkert, MOND-simple, and baryonic-only models. Results are preliminary and intended to motivate further validation with global optimization, baryonic scaling tests, lensing analysis, and field-theoretic development.