Graph-Spectral Validation Across the Hadron Zoo: Compact Latent Structure, Branches, and Heavy-Flavor Outliers

This work presents a graph-spectral analysis of hadronic systems based on PDG-derived features.A low-dimensional latent structure is identified, revealing coherent branching patterns and heavy-flavor outliers.The study emphasizes robustness across chart constructions and provides a conservative validation framework for data-driven physical embeddings. This record is deposited for authorship and priority purposes. Access is currently restricted.