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We estimate the contributions by double-parton interactions to the crosssections for pp->pi^0 pi^0 X and dA->pi^0 pi^0 X at RHIC. We find that suchcontributions become important at large forward rapidities of the producedpions. This is in particular the case for dA scattering, where they stronglyenhance the azimuthal-angular independent "pedestal" component of the crosssection, providing a natural explanation of this feature of the RHIC dA data.We argue that the discussed processes open a window to studies of double quarkdistributions in nucleons. We also briefly address the roles of shadowing andenergy loss in dA scattering, which we show to affect the double-inclusive pioncross section much more strongly than the single-inclusive one. We discuss theimplications of our results for the interpretation of pion azimuthalcorrelations.

Multiple parton interactions and forward double pion production in pp and dA scattering