Spin asymmetries in inclusive cross sections

Using the now closed Argonne ZGS polarized-proton beam, and the Michigan polarized-proton target, we have studied the one-spin and two-spin asymmetries of pion and proton production in the inclusive reactions p up arrow + p up arrow → p + Anything, and p up arrow + p up arrow → pi/sup +/ + Anything at P/sub lab/ = 6, 11.75, and 12.75 GeV/c. We observed experimental one-spin and two-spin asymmetries by scattering the polarized-proton beam from our polarized-proton target in each of the four possible initial spin states. These inclusive one-spin and two-spin asymmetries were calculated using the measured experimental spin asymmetries and three types of background measurements taken at P/sub lab/ = 6 and 11.75 GeV/c. We varied the transverse momentum P/sub perpendicular/) of the outgoing pion or proton from 0.71 to 1.55 GeV/c, and Feynman x variable from -0.08 to 0.67