Within a multiphase transport (AMPT) model, dijet asymmetry is studied in $\mathrm{Pb}+\mathrm{Pb}$ collisions at $\sqrt{s_{{}_{NN}}}=2.76$ 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 effect 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 $\mathrm{Pb}+\mathrm{Pb}$ collisions.

• Received 11 April 2013

DOI:https://doi.org/10.1103/PhysRevC.87.064901