Thinking outside the ROCs: Designing Decorrelated Taggers (DDT) for jet substructure

TL;DR

This paper introduces Decorrelated Taggers (DDT), a method to modify jet substructure observables to reduce correlations, enhancing the identification of boosted objects in particle physics experiments.

Contribution

The paper presents a novel approach to decorrelate jet substructure observables, improving experimental measurements and searches for new phenomena.

Findings

Decorrelated observables improve signal-background separation.

Method reduces correlations in jet substructure measurements.

Recommendations for optimal observables in $W$ jet tagging.

Abstract

We explore the scale-dependence and correlations of jet substructure observables to improve upon existing techniques in the identification of highly Lorentz-boosted objects. Modified observables are designed to remove correlations from existing theoretically well-understood observables, providing practical advantages for experimental measurements and searches for new phenomena. We study such observables in $W$ jet tagging and provide recommendations for observables based on considerations beyond signal and background efficiencies.