System Size Dependence of Azimuthal Correlations in Relativistic Heavy   Ion Collisions
  Systematic comparisons of jet pair correlations obtained in Cu+Cu and Au+Au collisions at $\sqrt{s_{NN}}=$200 GeV are presented. The measured jet-pair distributions for both systems, show strong modification of the away-side jet. For the same number of participating nucleons, the modification does not show a strong dependence on the collision system. It is suggested that such comparisons can provide important constraints for models which predict specific path length dependent jet modification effects. 
Wolf G. Holzmann (for the PHENIX Collaboration) (Department of   Chemistry, SUNY Stony Brook, Stony Brook, NY, USA)