Parton color reconnection in Herwig 7 using a spacetime event topology

TL;DR

This paper introduces a novel spacetime topology model for parton systems in Herwig 7, improving the description of hadronization by combining momentum and position data, and shows promising agreement with experimental data.

Contribution

First implementation of a spacetime topology description of parton systems in Herwig 7, enhancing hadronization modeling with a boost-invariant distance measure.

Findings

Model shows reasonable agreement with experimental data

Spacetime event topology can be effectively utilized in hadronization

Method provides a new approach to parton system analysis

Abstract

Herwig 7 is a general-purpose Monte Carlo generator of particle collisions comprising both hard perturbative as well as soft phenomenological physics. Herwig is therefore capable to describe the entire final state of hadronized particles in a collision event. A spacetime topology of a parton system entering hadronization is fully described and tested for the first time. A combination of information from particles momenta and spacetime positions is utilized to minimize a boost-invariant distance measure of the parton system. We present a reasonable agreement of the model with a selection of experimental data and conclude that spacetime event topology can be meaningfully used in the further development.