Energy and system dependence of high-$p_T$ triggered two-particle near-side correlations

Details Energy and system dependence of high-$p_T$ triggered two-particle near-side correlations Energy and system dependence of high-$p_T$ triggered two-particle near-side correlations

2008-09-30

arxiv.org/abs/0809.5261v1

Eur.Phys.J.C62:265-269,2009

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 6 figures, proceedings for Hot Quarks in Estes Park, Colorado

Scientific paper

10.1140/epjc/s10052-009-1037-8

Previous studies have indicated that the near-side peak of high-$p_T$ triggered correlations can be decomposed into two parts, the \textit{Jet} and the \textit{Ridge}. We present data on the yield per trigger of the \textit{Jet} and the \textit{Ridge} from $d+Au$, $Cu+Cu$ and $Au+Au$ collisions at $\sqrt{s_{NN}}$ = 62.4 GeV and 200 GeV and compare data on the \textit{Jet} to PYTHIA 8.1 simulations for $p+p$. PYTHIA describes the \textit{Jet} component up to a scaling factor, meaning that PYTHIA can provide a better understanding of the \textit{Ridge} by giving insight into the effects of the kinematic cuts. We present collision energy and system dependence of the \textit{Ridge} yield, which should help distinguish models for the production mechanism of the \textit{Ridge}.

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