Quark and gluon jet properties at LEP

TL;DR

This paper investigates quark and gluon jet properties at LEP, measuring the color factor ratio and analyzing particle production, providing insights into QCD fragmentation processes.

Contribution

It presents experimental measurements of quark and gluon jet differences, including the color factor ratio and particle composition, advancing understanding of QCD jet fragmentation.

Findings

Color factor ratio $C_A/C_F$ agrees with QCD predictions

No overproduction of isoscalar $ ext{η}^0$ and $ ext{φ}(1020)$ in gluon jets

An excess of protons observed in gluon jets

Abstract

The study of the differences of the fragmentation of quarks and gluons to jets of hadrons gives insight into the fundamental structure of QCD. Results from different approaches to properties of quarks and gluons are shown. The colour factor ratio $C_A/C_F$ is measured in agreement with the QCD prediction. Identified particles in quark and gluon jets are investigated, revealing no overproduction of isoscalar $\eta^0$ and $\phi(1020)$ in gluon jets, but an excess of protons.