  Within a multiphase transport model, medium modifications of differential jet
shapes are investigated in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76
TeV. The differential jet shapes are significantly modified by the strong
interactions between jets and a partonic medium in Pb+Pb collisions relative to
that in p+p collisions. The modifications are slightly weakened by the
hadronization of coalescence, but strengthened by resonance decays in hadronic
rescatterings. Subleading jets display larger medium modifications than leading
jets, especially in central Pb+Pb collisions with large dijet asymmetries.
These behaviors of medium modifications of differential jet shapes reflect a
dynamical evolution of redistribution of jet energy inside a quenched jet cone
in high-energy heavy-ion collisions.
