We study the production of π + 's and protons at 90° with p t>1.15 GeV and their correlations with forward protons. Fewer forward protons are observed for a 90° proton trigger than for a π + trigger. This is in qualitative agreement with the idea of an effective diquark scattering mechanism. Additionally, we observe that a K + produced at 90° is correlated with an enhanced forward production of λ O .
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