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

Abstract

Within a multi-phase transport (AMPT) model, dijet asymmetry is studied in Pb+Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 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.

6 pages, 7 figures (final published version)

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