Investigating the origin of the long range pseudo rapidity correlation in 2d di-hadron measurements from STAR
Abstract
Angular di-hadron correlations reveal novel structures in central Au+Au collisions at SNN = 200 GeV. One of them, known as the ridge, is elongated in pseudo rapidity and peaks on the near side (φ ≈ 0). Investigating the origin of the ridge structure helps to understand the hot dense matter that is created in ultra relativistic heavy ion collisions. Results showing the <pT> dependence of the ridge structure are presented. Evidence for possible jet and non-jet contributions to the ridge structure will be discussed.
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