  A strong suppression of Pi production in Au+Au collision was discovered at
RHIC energies in the high-p_T region. The lack of this suppression in d+Au
collision proved, this effect can be connected to final state effects, namely
medium induced jet energy loss caused by dense color matter. Here we display
our quantitative results on jet quenching in Au+Au collision using our
pQCD-based parton model calculations. In parallel we present results on d+Au
collision.
