Dijet asymmetry in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV within a multiphase transport model

TL;DR

This study uses a multi-phase transport model to analyze dijet asymmetry in lead-lead collisions at 2.76 TeV, revealing that strong jet-medium interactions cause significant asymmetry, mainly influenced by initial conditions and partonic energy loss.

Contribution

It demonstrates that dijet asymmetry is primarily driven by jet interactions with the partonic medium and shows minimal impact from hadronization or hadronic rescatterings.

Findings

Large dijet asymmetry caused by jet-partonic matter interactions

Hadronization and rescattering have little effect on asymmetry

Asymmetry correlates with initial conditions and partonic energy loss

Abstract

Within a multi-phase transport (AMPT) model, dijet asymmetry is studied in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV. It is found that a large dijet asymmetry ($A_{J}$) is produced by strong interactions between jets and partonic matter. It is demonstrated that hadronization and final-state hadronic rescatterings have little effects on $A_{J}$. The final $A_{J}$ is found to be driven by both initial $A_{J}$ and partonic jet energy loss, which is consistent with an increasing jet energy loss in a hot and strongly interacting partonic medium in more central Pb+Pb collisions.