Star formation efficiency (SFE) is small and mass- and redshift-dependent, peaking near Milky Way-sized halos (Behroozi 2013; Conroy & Wechsler 2009). High-z JWST observations show systems converting gas at SFE approaching the theoretical maximum (~50%), exceeding standard feedback-regulated expectations by 3 to 5x at any other epoch. ΛCDM models can broadly reproduce the trend at low z by tuning feedback but struggle with the high-z efficiency surge.
The standard model assumes feedback-regulated star formation with low SFE maintained by supernova and stellar wind feedback. Reaching ~50% SFE at z > 7 demands either feedback failure on small halos at high z or unphysical gas-cooling efficiency, neither of which is parsimonious within minimal ΛCDM.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, the high-z SFE problem dissolves because galaxies at z > 7 are NOT assembled from primordial gas through feedback-regulated star formation. They are cascade-seeded proto-galaxies with substantial baryonic content already deposited at cascade-end (P22, P25). Reasonable SFE (10 to 30%, comparable to local star-formation efficiency) operating on the cascade-seeded high-density gas reservoirs naturally produces the observed early massive galaxies without requiring 50% efficiency.
The apparent SFE measurement near 50% in the ΛCDM framework is an artifact: the model assumes the gas needed to be assembled from primordial conditions through hierarchical accretion, so seeing M_star ≈ 10¹⁰ M☉ at z = 14 implies impossible SFE. The cascade-seeded picture has the gas already concentrated at cascade-end, so reasonable SFE operating on the existing reservoirs explains the observation. The same M1 framework that resolves the JWST early-galaxy mass crisis (recid 7, 108) and the SMBH-seed problem (recid 109) accounts for the SFE puzzle.
Angular-momentum inheritance (P31, P32) gives coherent disk structure at deposition, enabling efficient star formation in disk-aligned cascade-stream regions. Mesh dissipation (P14, P15, P16) gives the later-time SFE evolution as Λ_eff(x,t) becomes more dominant and suppresses gas inflow. The combination of cascade-seeded high-density gas plus reasonable SFE plus the mesh-dissipation late-time decline produces the full observed SFE evolution naturally. There is no need to invoke unphysical feedback failure at high z.
If precision JWST + ALMA + Roman gas-content surveys at z > 7 find galaxies with low gas content at observed M_star levels (consistent with high-SFE conversion of small initial gas reservoir, no cascade-seeded high-density gas), the M1 cascade-deposition explanation is refuted. The signature SCT prediction is high-z galaxies showing substantial residual gas content consistent with reasonable SFE on cascade-seeded reservoirs.