Spin Asymmetries in Inclusive Cross-Sections.
T. Shima · CERN Document Server (European Organization for Nuclear Research) · 1981
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(UPARR)+p(UPARR) (--->) p+Anything, and p(UPARR)+p(UPARR) (--->) (pi)('+)+Anything at P(,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, ((UPARR)(UPARR),(UPARR)(DARR),(DARR)(UPARR),(DARR)(DARR)). 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(,lab) = 6 and 11.75 GeV/c. We varied the transverse momentum (P(,(PERP))) of the outgoing pion or proton from 0.71 to 1.55 GeV/c, and Feynman x variable from -0.08 to 0.67.