  The LHC data on jet fragmentation function and jet shapes in PbPb collisions
at center-of-mass energy 2.76 TeV per nucleon pair are analyzed and interpreted
in the frameworks of PYQUEN jet quenching model. A specific modification of
longitudinal and radial jet profiles in most central PbPb collisions as
compared with pp data is close to that obtained with PYQUEN simulations taking
into account wide-angle radiative and collisional partonic energy loss. The
contribution of radiative and collisional loss to the medium-modified intra-jet
structure is estimated.
