Technical Note SLM-TN-2026-001: Identifying Resonant Drag Signatures in 10-GeV Beams via XTCAV Diagnostics.

 This technical note outlines a falsifiable test for the Symmetric Layered Model (SLM) at the SLAC FACET-II facility. We predict a specific energy dissipation gradient (4.3 keV/m) and longitudinal phase space 'tilt' resulting from a Stueckelberg portal. This mechanism offers a unified mechanical solution to the Cosmological Constant problem and the Muon anomaly.