  Dijet production in PbPb collisions at a nucleon-nucleon center-of-mass
energy of 2.76 TeV is studied with the CMS detector at the LHC. A data sample
corresponding to an integrated luminosity of 150 inverse microbarns is
analyzed. Jets are reconstructed using combined information from tracking and
calorimetry. The dijet momentum balance and angular correlations are studied as
a function of collision centrality and leading jet transverse momentum. For the
most peripheral PbPb collisions, good agreement of the dijet momentum balance
distributions with pp data and reference calculations at the same collision
energy is found, while more central collisions show a strong imbalance of
leading and subleading jet transverse momenta attributed to the jet-quenching
effect. The dijet momentum imbalance in central collisions is found to persist
for leading jet transverse momenta up to the highest values studied.
