  Dijets in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76
TeV are studied with the CMS detector at the LHC. It is shown that the
fragmentation functions of jets into charged particle tracks with transverse
momenta pT > 4 GeV/c in PbPb collisions are similar to those in pp collisions,
for both the leading and subleading jets. In addition, study of high statistics
PbPb data acquired in 2011 shows that the quenching phenomenon exists up to
highest jet pT values in excess of 300 GeV/c.
