Abstract
A primary goal of the STAR spin physics program is measuring the polarized gluon distribution function, Δg(x), accessible through the double longitudinal spin asymmetry, ALL. The STAR detector is uniquely suited for measuring ALL in a number of different final‐state channels, such as inclusive jet and pion production, in polarized pp collisions. We present preliminary ALL results from RHIC run 6 for neutral pion production at mid‐rapidity. These ALL measurements allow for discrimination among a number of different next‐to‐leading order (NLO) perturbative Quantum Chromodynamics (pQCD) predictions and provide meaningful constraints on Δg(x).
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