  Recent RHIC results on pion production in AuAu collision at sqrt(s)=130 and
200 AGeV display a strong suppression effect at high p_T. This suppression can
be connected to final state effects, namely jet energy loss induced by the
produced dense colored matter. Applying our pQCD-based parton model we perform
a quantitative analysis of the measured suppression pattern and determine the
opacity of the produced deconfined matter.
