Dijet asymmetry at the Large Hadron Collider

TL;DR

This paper uses the MARTINI simulation to compare theoretical predictions with LHC dijet asymmetry data, showing that partonic energy loss in a hot medium explains observed asymmetries.

Contribution

It introduces a detailed simulation framework for jet quenching that aligns well with experimental data from ATLAS and CMS.

Findings

Dijet asymmetry is consistent with partonic energy loss in a hot medium.

Simulation results match experimental measurements of asymmetry.

Hydrodynamical background modeling supports the energy loss interpretation.

Abstract

The MARTINI numerical simulation allows for direct comparison of theoretical model calculations and the latest results for dijet asymmetry from the ATLAS and CMS collaborations. In this paper, partons are simulated as undergoing radiative and collisional processes throughout the evolution of central lead-lead collisions at the Large Hadron Collider. Using hydrodynamical background evolution determined by a simulation which fits well with the data on charged particle multiplicities from ALICE and a value of $\alpha_s\approx 0.25-0.3$, the dijet asymmetry is found to be consistent with partonic energy loss in a hot, strongly-interacting medium.