Improving the Simulation of Quark and Gluon Jets with Herwig 7

TL;DR

This paper enhances the Herwig 7.1 Monte Carlo event generator by improving the modeling of gluon jets through better perturbative and non-perturbative techniques, incorporating gluon data into tuning, leading to more accurate simulations at the LHC.

Contribution

The paper introduces new tuning methods for Herwig 7.1 that incorporate gluon jet data, significantly improving gluon jet simulation accuracy.

Findings

Improved gluon jet modeling in Herwig 7.1

Enhanced agreement with experimental data for gluon jets

Default tunes now include gluon-initiated jet data

Abstract

The properties of quark and gluon jets, and the differences between them, are increasingly important at the LHC. However, Monte Carlo event generators are normally tuned to data from $e^+e^-$ collisions which are primarily sensitive to quark-initiated jets. In order to improve the description of gluon jets we make improvements to the perturbative and the non-perturbative modelling of gluon jets and include data with gluon-initiated jets in the tuning for the first time. The resultant tunes significantly improve the description of gluon jets and are now the default in Herwig 7.1.