Unified treatment of the $\mathrm{pd}\to \mathrm{dp}$ and $\mathrm{pp}\to {\pi }^{+}d$ processes in a model of $N$ and $N^{*}$ exchanges

We present a unified account of two related processes, $\mathrm{pd}\to \mathrm{dp}$ and $\mathrm{pp}\to {\pi }^{+}d$, in a scheme of higher baryon couplings developed by this group. The work which represents a considerably improved version of an earlier model for the study of the $\mathrm{pd}\to \mathrm{dp}$ process at moderately high energies (1.0-1.5 GeV) is now extended to include (i) lower energies (down to 300 MeV) for $\mathrm{pd}\to \mathrm{dp}$, and (ii) the related process $\mathrm{pp}\to {\pi }^{+}d$, within a common set of assumptions for the $N$ and $N^{*}$ exchange vertices. The fits to the data for both the processes come out rather well over their respective energy ranges, which are appreciable.