Forward π0 production has been measured at STAR with the new Forward Meson Spectrometer (FMS) from p+p and d+Au collisions during the 2008 RHIC run. We present the first FMS results of azimuthal correlation involving a forward π0 produced in p+p and d+Au collisions to search for the onset of gluon density saturation, expected to occur at small momentum fractions.
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