Dark Sector Showers and Hadronisation in Herwig 7

TL;DR

This paper introduces a new simulation framework for strongly interacting dark sectors using Herwig 7, exploring how dark sector parameters influence event shapes and correlations, and discussing uncertainties in hadronisation modeling.

Contribution

It presents the first implementation of dark sector showers and hadronisation in Herwig 7, enabling detailed studies of dark sector phenomenology.

Findings

Variation of dark sector parameters affects thrust and angularities.

Correlation functions reveal the angular structure of dark sector events.

Uncertainties in hadronisation parameters impact simulation predictions.

Abstract

We present a novel simulation of a strongly interacting dark sector also known as the Hidden Valley scenarios using angular ordered showers and the cluster hadronisation model in Herwig 7. We discuss the basics of this implementation and the scale hierarchies underpinning the simulation. With the help of a few benchmarks, we show the effect of variation of dark sector parameters on thrust and angularities within the dark sector, and study correlation functions, which can be helpful for understanding the angular structure of these events. Finally we comment on the uncertainties introduced due to lack of knowledge of hadronisation parameters within the dark sectors.