High-Energy Backward Elastic Proton-Deuteron Scattering and Baryon Resonances

Elastic proton-deuteron scattering at 1 GeV shows a peak at 180° which seems larger than that predicted by a simple nucleon-transfer mechanism. A straightforward generalization of the nucleon-transfer mechanism is obtained through a Regge extension of the model, permitting a calculation of the ($p, d$) process using the parameters of a (${\pi }^{+}, p$) Regge model. A dynamic interpretation is attempted via a static field theory. It is estimated that a deuteron contains the $N^{*}\mathrm{}\left(1688\right)\mathrm{}$ resonance with a ½-1% probability and that this accounts for about half of the backward proton-deuteron scattering at 1 GeV.