Spin Asymmetries In Proton-Proton Scattering At High Energies And Moderately Large Momentum Transfer

Abstract

We study $pp$ scattering at high energies and moderately large momentum transfer using a QCD--based model in which the proton is viewed as being composed of a quark and a diquark. This model leads to spin asymmetries which are neither small nor vanish at high energies. The predicted ratio of helicity flip and non-flip amplitudes is about 0.2-0.3 and $A_n$ asymmetry is about 20-30% for $|t|>4{GeV}^2$.

Comments: Latex, 3 pages, 2 figures, uses sprocl.sty. Talk at SPIN98 symposium, September 8-12, Protvino, Russia