Production of nucleon resonances in π⁺d collisions

Abstract

Production of nucleon resonances in π⁺d collisions in the energy range 1–5 GeV has been investigated in a model developed earlier as a direct means of testing the dynamic role of N^* exchanges found in the processes π⁺d → pp and dp → pd. The results which are given in the form of inclusive cross sections for π⁺d → p(N^*, Δ⁺) show that despite the dominance of the isosbars P₃₃ and F₃₇, there are appreciable signals from the more prominent N^* resonances (F₁₅ and to some extent D₁₃), so as to be amenable to experimental observation. It is further argued that observation of these N^* should help discriminate the N^*exchange mechanism from other alternative such as OPE.