# Event-by-Event Simulations of Jet Modification Using the MATTER Event Generator

## TL;DR

This paper presents a detailed event-by-event simulation framework for jet modification in the Quark Gluon Plasma using the MATTER generator, integrating higher twist energy loss formalism with hydrodynamic medium modeling.

## Contribution

It introduces the MATTER event generator that combines higher twist energy loss with hydrodynamic medium evolution for realistic jet modification simulations.

## Key findings

- Jet and hadron observable results are obtained.
- Simulation incorporates medium-induced emissions and vacuum splittings.
- Uses hydrodynamic entropy density for medium modeling.

## Abstract

The modification of hard jets in the Quark Gluon Plasma (QGP) is studied using the MATTER event generator. Based on the higher twist formalism of energy loss, the MATTER event generator simulates the evolution of highly virtual partons through a medium. These partons sampled from an underlying PYTHIA kernel undergo splitting through a combination of vacuum and medium induced emission. The momentum exchange with the medium is simulated via the jet transport coefficient $\hat{q}$, which is assumed to scale with the entropy density at a given location in the medium. The entropy density is obtained from a relativistic viscous fluid dynamics simulation (VISH2+1D) in 2+1 space time dimensions. Results for jet and hadron observables are presented using an independent fragmentation model. These proceedings will focus on the physics input and simulation details of the MATTER event generator as compared to a variety of test observables.