Analyzing Powers for Forward p_↑+p → π~0+X at STAR

摘要

Preliminary results of the analyzing power for the production of forward, high-energy π~0 mesons from collisions of transversely polarized protons at s~(1/2) = 200GeV from STAR are presented. The kinematic ranges covered by the data are X_F ≈ 0.2 - 0.6 and p_T ≈ 1 - 3GeV/c. The analyzing power at s~(1/2) = 200GeV is found to be comparable to that observed at s~(1/2) = 20GeV.