  We analyze the possibilities for studying properties of dense QCD-matter,
created in ultrarelativistic nuclear collisions, by hard QCD-production
processes, so-called "hard" probes -- heavy quarkonia, hard jets, high mass
dimuons. Special attention is paid to the potential of coming heavy ion
experiments on Large Hadron Collider to observe the rescattering and energy
losses of hard partons in quark-gluon plasma.
