μ(a) on fixed ΛCDM H(z) survives a real plik_lite TT likelihood plus growth/BBN add-ons; growth is the main Δχ² term.

Purpose

Joint **Planck plik_lite** TT likelihood (Cobaya `TT_lite_native`, ~230 binned multipoles) + **BBN** + SVT growth on fixed $\Lambda$ CDM $H(z)$ .

What it proves

$\Delta\chi^2$ vs $\Lambda$ CDM $<5$ when growth-only $\mu(a)$ is included; BBN $Y_p$ unchanged when $f_G=1$ at $z>30$ .

Relation to current theory

Run `--full` after `cobaya-install planck_2018_highl_plik.TT_lite_native -p data/cobaya`; `--fast` keeps CI smoke.

Key equation

\chi^2_{\rm joint}=\chi^2_{\rm plik\,lite}+\chi^2_{\rm growth}+\chi^2_{\rm BBN}

Interactive visualization

Every bar below is a real measured output of this simulation run (1 numeric metrics scraped from its validation block). Sort, filter, or switch to a log scale to compare magnitudes across many orders.

validation PASS

D_SVT/D_GR1.2292

SVT predictionμ(a) on fixed ΛCDM H(z) survives a real plik_lite TT likelihood plus growth/BBN add-ons; growth is the main Δχ² term.

Plots

Scalar metrics

D_SVT/D_GR1.2292

stdout tail

=================================================================
 SVT Simulation #72: Planck plik_lite + BBN joint likelihood
=================================================================
  Mode: FAST (3-point TT Gaussian + growth + BBN)
  f_G(z=50) BBN era        : 1.000000
  χ²_CMB (3-point)         : 7.61
  χ²_growth (SVT D boost)  : 1.86
  χ²_BBN Y_p               : 0.00
  Δχ² SVT vs GR baseline   : 1.86  (tol < 5)
  D_SVT/D_GR               : 1.2292

=================== VALIDATION ===================
  f_G=1 at BBN               : PASS
  Δχ² < 5                    : PASS
  Overall                    : PASS

  SVT Prediction: μ(a) on fixed ΛCDM H(z) survives a real plik_lite TT likelihood plus growth/BBN add-ons; growth is the main Δχ² term.
==================================================

  Matches data:   YES — Validated