Colour reconnections in Herwig++

TL;DR

This paper details the implementation of a colour reconnection model in Herwig++, demonstrating improved agreement with LHC data on minimum bias and underlying events through detailed studies and tuning.

Contribution

It introduces a new colour reconnection model in Herwig++ and shows its effectiveness in matching experimental data.

Findings

Improved description of minimum bias data

Enhanced modeling of underlying events

Successful tuning to LHC data

Abstract

We describe the implementation details of the colour reconnection model in the event generator Herwig++. We study the impact on final-state observables in detail and confirm the model idea from colour preconfinement on the basis of studies within the cluster hadronization model. Moreover, we show that the description of minimum bias and underlying event data at the LHC is improved with this model and present results of a tune to available data.