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arXiv · 1106.0621

Rapidity dependence of azimuthal correlations for p+p and d+Au at $\sqrt{s}=200$GeV

Xuan Li
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Abstract

Forward di-jet production in d+Au collisions at RHIC provides sensitivity to Bjorken-x between 0.001 and 0.02 for the nuclear gluon density . The STAR experiment at RHIC has continuous azimuthal coverage with electromagnetic calorimeters for pseudo-rapidity from -1 to 4. We have measured forward+mid-rapidity $π^{0}-π^{0}$ and $π^{0}-h$ azimuthal correlations and forward+forward rapidity $π^{0}-π^{0}$ azimuthal correlations. Both analyses use the Forward Meson Spectrometer (FMS) triggered data in RHIC 2008 run p+p and d+Au collisions at $\sqrt{s_{NN}}$=200 GeV. The end-cap electromagnetic calorimeter (EEMC) at STAR covers pseudo-rapidity from 1.07 to 2. This provides us sensitivity to the nuclear gluon density at intermediate x values. Preliminary results on the $π^{0}-π^{0}$ and $π^{0}$ + jet-like azimuthal correlations with both the FMS and the EEMC will be discussed.

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Xuan Li. 2011-06-03. Rapidity dependence of azimuthal correlations for p+p and d+Au at $\sqrt{s}=200$GeV. https://doi.org/10.1088/1742-6596%2F316%2F1%2F012002

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