JEWEL - a Monte Carlo Model for Jet Quenching

TL;DR

JEWEL is a Monte Carlo model that simulates jet evolution and energy loss in dense QCD media, enabling detailed study of jet-medium interactions and modifications in high-energy physics experiments.

Contribution

It introduces a novel Monte Carlo framework for modeling both elastic and inelastic jet-medium interactions, including the Landau-Pomerantschuk-Migdal effect.

Findings

JEWEL reproduces jet measurements at LEP in the absence of medium effects.

The model characterizes jet modifications due to elastic and inelastic interactions.

Distinctive jet fragmentation patterns can differentiate energy loss mechanisms.

Abstract

The Monte Carlo model JEWEL 1.0 (Jet Evolution With Energy Loss) simulates parton shower evolution in the presence of a dense QCD medium. In its current form medium interactions are modelled as elastic scattering based on perturbative matrix elements and a simple prescription for medium induced gluon radiation. The parton shower is interfaced with a hadronisation model. In the absence of medium effects JEWEL is shown to reproduce jet measurements at LEP. The collisional energy loss is consistent with analytic calculations, but with JEWEL we can go a step further and characterise also jet-induced modifications of the medium. Elastic and inelastic medium interactions are shown to lead to distinctive modifications of the jet fragmentation pattern, which should allow to experimentally distinguish between collisional and radiative energy loss mechanisms. In these proceedings the main JEWEL results are summarised and a Monte Carlo algorithm is outlined that allows to include the Landau-Pomerantschuk-Migdal effect in probabilistic frameworks.