STAR: Jet reconstruction, direct γ and multi-hadron correlations: Hard Probes of the initial and final state

Recent results from the STAR collaboration focusing on hard probes of the initial and final state are presented. Correlations at forward rapidities in d+Au collisions at low x are utilized to study the possible onset of saturation effects at RHIC energies. Reference measurements of fully reconstructed jets in d+Au collisions as well as jet quantities in p+p collisions will be discussed. In addition, jet-hadron, direct γ-hadron correlations and results from full-jet reconstruction in Au+Au collisions will be presented and discussed with respect to the p+p reference measurements. These measurements can be used to put further constraints on the underlying mechanisms of partonic energy loss in heavy-ion collisions at RHIC.