Derived event-level diagnostics for multiplicity–mean transverse momentum coupling in public ATLAS Pb–Pb open data

This repository contains derived analysis outputs and cleaned Python/Colab code supporting an event-level study of selected-track multiplicity and event-level mean transverse momentum in public ATLAS Pb–Pb open data. The deposit includes CSV tables, JSON run summaries, analysis notes, checksum manifests, and cleaned scripts extracted from the Colab workflow. The raw ATLAS/CERN ROOT files are not redistributed here. They should be obtained from the CERN Open Data Portal. The included code and outputs document the event-level construction, source-aware standardization, residual controls, matched event-mixing tests, independent-particle null tests, track-thinning checks, Q-shape proxy checks, hard-tail proxy checks, and charged-particle spectrum-ratio proxy checks. The spectrum-ratio and hard-tail outputs are uncorrected diagnostic proxies only. They are not R_AA measurements, not corrected R_CP measurements, not reconstructed-jet measurements, and not detector-corrected ATLAS collaboration results.