Listening Beyond Four Dimensions: Higher-Dimensional Blast — vLASTMILE+ Canonical Snapshot & Tool‑Kit

NEXTLEVEL higher‑D blast (status + tools) — This Zenodo record collects the current status of a falsifiable higher‑dimensional “blast” scenario for the origin of our observable Universe. In this picture, a short and violent episode in a higher‑D phase seeds a cosmological stochastic gravitational‑wave background (SGWB) with a smooth broken power‑law (SBPL) spectrum whose knee lies in the nanohertz pulsar‑timing array (PTA) band.

This release (“vLASTMILE+”) provides a referee‑friendly snapshot plus a minimal end‑to‑end rerun path for the headline gates.

Canonical SBPL parameters (PTA‑amplitude model):
- f_k = 3.16e−8 Hz, Ω_k = 8.00e−9, α1 = 3.00, α2 = −2.00, Δ = 2.00.

Headline gate scoreboard (canonical PTA‑amplitude SBPL):
- PTA knee cross‑coherence: PCI_median = 0.869 (PASS; threshold 0.80).
- Physical ΔN_eff = 7.094e−4 (PASS under ΔN_eff < 0.06 / 0.3).
- SGWB safety: Ω_gw(25 Hz) = 2.285e−35, compared to LVK O4a isotropic SGWB limit Ω_max(25 Hz) = 2.8e−9 (SAFE).
- Ringdown pooled ε (placeholder workflow): ε_median = 1.006e−2.
- Lepton texture: max |z| = 0.137 (PASS).
- Neutrino texture: max |z| = 0.574 (WARN).
- Quark texture naturalness: QCI = 0.120 (PASS).
- Indices: BCI = 29.361, FCI = 0.542, TCS = 29.903, (TCS + QCI) = 30.022.

What’s included (recommended entry points):
(i) NEXTLEVEL_LastMile_Report_20251212_v7.pdf — human‑readable status + tables + equations.
(ii) NEXTLEVEL_GrandStatus_Canonical_20251212_v6_withToE.json — machine‑readable “single source of truth” scoreboard.
(iii) NEXTLEVEL_StarterKit_UNIFIED_20251213_v6.md — copy/paste starter kit (new‑chat bootstrap + referee notes).
(iv) README_NEXTLEVEL_RERUN_ALL_GATES.md — step‑by‑step rerun instructions + minimal scripts (ΔN_eff physical, PCI, ringdown ε pooling).
(v) Talk deck + updated plots bundle.

Notes on scientific status:
Passing gates means this SBPL + gate framework is consistent with current constraints; it is not (yet) a proof of origin. The strongest next steps are direct PTA spectral fits + Bayesian comparison against SMBHB/cosmic‑string models, plus expanded multi‑event ringdown pooling.