We investigate the color and spin structure of multiparton processes, using a rigorous formalism for handling such new processes. The new ingredients are the double structure functions Γ_ΛL(x₁,x₂,bT)'s which in addition to the joint x₁, x₂, and bT distribution (bT=relative transverse distance of the two incoming partons), carry information about the color (L) and spin ({Λ}) state of the diparton system. We also work out the cross section for these processes, which is a nontrivial generalization of the two-parton-initiated cross section.
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Mustapha Mekhfi (1985) studied this question.
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