Reaction Plane Dependent Away-side Modification and Near-side Ridge in Au+Au Collisions

Abstract

STAR preliminary results of di-hadron correlations versus ${\varphi }_s$, the trigger particle azimuthal angle relative to the constructed event plane are reported for mid-central Au+Au collisions and compared to central Au+Au as well as minimum bias d+Au collisions. The correlations are observed to vary with ${\varphi }_s$ on both the near and away side of the trigger particle. The away-side correlation evolves from single- to double-peak with increasing ${\varphi }_s$. The near-side correlation is separated into 'jet' and 'ridge': the ridge is found to decrease with ${\varphi }_s$ while the jet remains relatively constant.

5 pages, 5 figures

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