Disseration Defense: Kolja Kauder
Using gold-gold and deuteron-gold collision data collected by the STAR detector at RHIC, I present a systematic study of the dependence of di-hadron correlation structures on the identity of the trigger particle by statistically separating pion from non-pion (i.e. proton and kaon) triggers. Stark differences are found both at small relative angles, consistent with quark recombination models, and at long ranges where they qualitatively agree with the common explanation of both ridge and away-side structures as resulting from hydrodynamic medium expansion but can also be described by a mathematical model with very different physics implications. Quantitative measurements are shown and discussed in these contexts.