Projection Asymmetry — A Collider Method: A Reproducible Read of Public Collider Data and a Selection Rule for When Detector Disagreement Is Physics

Abstract. We offer an additional, reproducible way to read public collider data — projection asymmetry, the disagreement between two detector subsystems (tracker and calorimeter) viewing the same event — and a selection rule for when that disagreement carries physics rather than instrument. Applied to data that already exists, it is meant to support existing analyses, not to correct them: the observables are standard and the signature we recover is well established. The method runs in pure Python (uproot; no ROOT/CMSSW) on public CMS Open Data, and we validate it by recovering the known γ/Z forward–backward sign-flip across the Z pole (Collins–Soper frame; 2.0σ on N = 28,295 Z→ℓℓ; flavor-universal). The selection rule — a projection asymmetry is interpretable as coupling geometry only where the instrument's bias is symmetric across the axis of the asymmetry, so that it cancels — is confirmed in the negative: the non-symmetry-protected angular coefficients of the same decay return unphysical raw values, exactly where the rule predicts. The projection-asymmetry operator originates in the Superasymmetry (SASY) coupling framework (IE-002 [5]; framework in a companion paper [7]); the same observable class — a projection asymmetry that flips sign across a threshold — appears independently in gravitational-wave mode ratios [6], indicating the read is not collider-specific. Data, figures, and code accompany the paper; falsifiable predictions for the method are stated. Author: James E. Dunn — Independent Researcher, Hydrogen Lifecycle Research ProgrammeORCID: https://orcid.org/0009-0005-2679-6574Corpus (author search): https://zenodo.org/search?q=creators.orcid:0009-0005-2679-6574SciX (NASA discovery): https://scixplorer.org/search/q=orcid%3A0009-0005-2679-6574ADS (Harvard-CfA): https://ui.adsabs.harvard.edu/search/q=orcid%3A0009-0005-2679-6574License: CC BY 4.0 International