A MESON-EXCHANGE ISOBAR MODEL FOR THE PI(--]PP REACTION()D[)

We calculated a broad set of observables for the pi(+)d reversible arr ow pp reaction with a relatively simple meson-exchange isobar model. T he comparison between the calculated results and experimental data (in cluding spin observables) shows that the model gives an overall phenom enologically acceptable description of the reaction around the Delta r esonance. We also take into account the effects due to the inclusion o f the Galilei invariant (pseudovector) recoil term in the pi NN vertex , of relativistic corrections to the rho-exchange component of the Del ta N transition potential, and of NN final state interaction in the pi (+)d --> p + p process. Rescatterings via pion-nucleon interaction in the S-wave have also been included. The model is sufficiently simple t o be extended to the case of pion absorption on other light nuclei, in particular He-3 (or tritium).