Jet Modification in a Brick of QGP Matter

TL;DR

This paper integrates the LPM effect into a microscopic transport model to better understand jet modifications in quark-gluon plasma, verifying energy loss predictions and applying to LHC di-jet observations.

Contribution

It introduces a novel implementation of the LPM effect into a partonic transport model, enabling detailed simulation of jet quenching phenomena.

Findings

Model reproduces leading parton energy loss consistent with BDMPS-Z predictions.

Successfully describes di-jet modifications observed at the LHC.

Highlights importance of quantum interference in jet quenching.

Abstract

We have implemented the LPM effect into a microscopic transport model with partonic degrees of freedom by following the algorithm of Zapp & Wiedemann. The Landau-Pomeranchuk-Migdal (LPM) effect is a quantum interference process that modifies the emission of radiation in the presence of a dense medium. In QCD this results in a quadratic length dependence for radiative energy loss. This is an important effect for the modification of jets by their passage through the QGP. We verify the leading parton energy loss in the model against the leading order Baier-Dokshitzer-Mueller-Peigne-Schiff-Zakharov (BDMPS-Z) result. We apply our model to the recent observations of the modification of di-jets at the LHC.