  The jet-medium interaction in high energy heavy ion collisions is an
important phenomena to characterize the hot and dense medium produced in such
collisions. The study of medium-induced modifications to the substructure of
inclusive charged jets indicates a redistribution of energy inside the jet cone
and provides insight into the energy loss mechanisms of jets in the medium. We
investigate the in-medium modification to two jet shape observables i.e., the
differential jet shape ($\rho$(r)) and the angularity (g) in the most central
$Pb-Pb$ collisions at $\sqrt{s_{NN}} ~=~ 2.76 $ TeV using two commonly used
event generators i.e., JEWEL (recoil OFF) and EPOS-3 in the jet-p$_T$ range of
20-40 GeV/c. JEWEL with recoil OFF has been used primarily as a reference
system as that has been found to explain the global jet observables
satisfactorily but lacks in jet-shape variables at higher jet-radii. EPOS-3
that explains the bulk properties in such collisions quite well takes into
account a hydrodynamically evolving bulk matter, jets and hard-soft
interactions. A comparison between the results from these models shows that
while JEWEL (recoil OFF) does not explain the distribution of lost energy at
higher radii with respect to the jet-axis, EPOS-3 explains the effect quite
well. However, in EPOS-3, the partonic energy loss mechanism and secondary
hard-soft interactions during hadronization and hadronic cascade phase are
different from the conventional jet energy loss models. The current study can,
therefore, provide important new insights on mechanisms regarding the modeling
of the medium and hard-soft interactions in heavy ion collisions.
