2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198980The S-wave scattering length of the strong pion-deuteron (pi D) scattering is calculated in the relativistic field theory model of the deuteron suggested in [1,2].The theoretical result agrees well with the experimental data. The important role of the Delta-resonance contribution to the elastic pi D-scattering is confirmed.7 pages, no figures, accepted for publication in Z. Phys. ANuclear Theorytext