Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-06-03
J.Phys.Conf.Ser.316:012002,2011
Physics
High Energy Physics
High Energy Physics - Experiment
6 pages, 5 figures, Talk presented at the 27th Winter Workshop on Nuclear Dynamics, Winter Park, Colorado, USA, February 6-13,
Scientific paper
10.1088/1742-6596/316/1/012002
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 $\pi^{0}-\pi^{0}$ and $\pi^{0}-h$ azimuthal correlations and forward+forward rapidity $\pi^{0}-\pi^{0}$ 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 $\pi^{0}-\pi^{0}$ and $\pi^{0}$ + jet-like azimuthal correlations with both the FMS and the EEMC will be discussed.
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