Novel approach to measure quark/gluon jets at the LHC

TL;DR

This paper proposes a novel statistical method to distinguish quark and gluon jets at the LHC by combining data at different energies, enabling jet property measurements without individual tagging.

Contribution

It introduces a new measurement strategy leveraging multi-energy data to statistically separate quark and gluon jets without event-by-event tagging.

Findings

Method demonstrated with angularity observables

Potential to improve jet property discrimination

Framework applicable to various jet observables

Abstract

In this paper, we present a new proposal on how to measure quark/gluon jet properties at the LHC. The measurement strategy takes advantage of the fact that the LHC has collected data at different energies. Measurements at two or more energies can be combined to yield distributions of any jet property separated into quark and gluon jet samples on a statistical basis, without the need for an independent event-by-event tag. We illustrate our method with a variety of different angularity observables, and discuss how to narrow down the search for the most useful observables.