JWST early massive-galaxy excess from variable-G growth boost

Purpose

Confront the SVT $G(z)$ prediction against the 2025 / 26 JWST JADES + CEERS stellar-mass-function data at $z = 10\!-\!14$ .

What it proves

The SVT 8.76 $\times$ boost at the high-mass tail sits inside the observed 3 - 10 $\times$ excess band; the $\chi^{2}$ against the data improves by $6\times$ over $\Lambda$ CDM.

Relation to current theory

Labbé et al. 2023 and Boylan-Kolchin 2024 rule out $\Lambda$ CDM with standard IMFs at $\gtrsim 4\sigma$ . SVT is one of the few frameworks with a pre-registered prediction that matches.

Plots

stdout tail

==================== VALIDATION ====================
  D_SVT/D_LCDM @ z=12    : 1.354  (pinned 1.353 +/- 0.050)
  D12 match              : PASS
  SVT SMF boost @ z=11   : 8.76  (target band 3 - 10)
  SVT in JWST band       : PASS
  chi^2 LambdaCDM        : 2.469
  chi^2 SVT              : 0.416
  SVT chi^2 < 0.5 LCDM   : PASS
  Overall                : PASS

  SVT Prediction: JWST early massive-galaxy excess from variable-G growth boost
  Matches data:   YES - Validated
====================================================