Jets at electron-positron colliders

TL;DR

This paper offers a comprehensive pedagogical overview of hadronic jets and event shapes at electron-positron colliders, covering definitions, theoretical predictions, jet substructure, and recent developments in the field.

Contribution

It provides an integrated introduction to jet physics at lepton colliders, including new insights into jet substructure techniques and their theoretical modeling.

Findings

Overview of jet definitions and event shape observables

Discussion of perturbative QCD predictions with resummation and parton showers

Introduction to advanced jet substructure methods like Lund jet plane and Soft Drop

Abstract

We provide a pedagogical introduction to the physics of hadronic jets and event shapes at electron-positron colliders. We present some of the main jet definitions and event shape observables studied at lepton colliders and discuss how to produce theoretical predictions in perturbative quantum chromodynamics (QCD), both at fixed order and with resummation or parton showers. We further introduce important topics in jet substructure that have seen developments in a lepton collider environment, such as the Lund jet plane, Soft Drop, and quark-gluon jet discrimination. Finally, we briefly elaborate on selected topics, such as flavoured jets, hadronic decays of the Higgs boson, and non-perturbative effects.