Systematic Comparison of Jet Energy-Loss Schemes in a 3D hydrodynamic medium

TL;DR

This paper compares three jet energy-loss models within a 3D hydrodynamic medium, showing they can all fit inclusive data but differ in azimuthal predictions and the required transport coefficient values.

Contribution

It provides a systematic comparison of BDMPS/ASW, HT, and AMY jet energy-loss schemes using a consistent hydrodynamic background, highlighting their similarities and differences.

Findings

All models fit inclusive $R_{AA}$ data with parameter adjustments.

Predictions for azimuthal $R_{AA}$ show slight differences.

Transport coefficient $$ varies significantly among models.

Abstract

We utilize a 3D hydrodynamic model to provide the medium evolution for a systematic comparison of jet energy-loss calculations in the BDMPS/ASW, HT and AMY approaches. We find that the parameters of all three calculations can be adjusted to provide a good description of inclusive data on $R_{AA}$ versus transverse momentum. However, we do observe slight differences in their predictions for the azimuthal angular dependence of $R_{AA}$ vs. $p_T$. We also note that the value of the transport coefficient $\hat{q}$ needed in the three approaches to describe the data differs significantly.