Jet reconstruction at high-energy lepton colliders

TL;DR

This study compares various jet reconstruction algorithms at high-energy electron-positron colliders, highlighting their performance under different conditions and identifying the most robust methods for realistic backgrounds.

Contribution

It provides a detailed comparison of classical, Valencia, and longitudinally invariant algorithms using realistic detector simulations at 3 TeV.

Findings

Classical algorithms have the best response in ideal conditions.

Valencia and longitudinally invariant algorithms are more robust against background.

Valencia algorithm shows a slight performance advantage.

Abstract

In this paper we study the performance in $e^+e^-$ collisions of classical $e^+e^-$ jet reconstruction algorithms, longitudinally invariant algorithms and the recently-proposed Valencia algorithm. The study includes a comparison of perturbative and non-perturbative jet energy corrections and the response under realistic background conditions. Several algorithms are benchmarked with a detailed detector simulation at $\sqrt{s}= 3$~\tev. We find that the classical $e^+e^-$ algorithms, with or without beam jets, have the best response, but are inadequate in environments with non-negligible background. The Valencia algorithm and longitudinally invariant $k_t$ algorithms have a much more robust performance, with a slight advantage for the former.