Large analyzing power in inclusive π± production at high xF with a 22-GeV/c polarized proton beam

Abstract The analyzing power, A N , in inclusive charged-pion production has been measured using a ∼22-GeV/c transversely-polarized proton beam on a carbon target. A large A N was found for x F >0.5 and for 0.6 p T π + and π − . This mirror behavior and the magnitudes are similar to π ± production from 200-GeV/c polarized protons on a hydrogen target. The analyzing power for inclusive proton production has also been measured and is consistent with zero.