Optimal jet radius in kinematic dijet reconstruction

TL;DR

This paper analytically determines the optimal jet radius for dijet reconstruction, balancing capturing radiation and minimizing contamination, and compares the results with Monte Carlo simulations.

Contribution

It provides an analytical calculation of the optimal jet radius for dijet reconstruction and examines its scale dependence, enhancing previous Monte Carlo studies.

Findings

Optimal jet radius depends on the scale of the process.

Analytical results align with Monte Carlo simulations.

Guidelines for choosing jet radius in experiments.

Abstract

Obtaining a good momentum reconstruction of a jet is a compromise between taking it large enough to catch the perturbative final-state radiation and small enough to avoid too much contamination from the underlying event and initial-state radiation. In this paper, we compute analytically the optimal jet radius for dijet reconstructions and study its scale dependence. We also compare our results with previous Monte-Carlo studies.