2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192290By calculating the contribution of the $π-π$ three-body force to the three-nucleon binding energy in terms of the $πN$ amplitude using perturbation theory, we are able to determine the contribution of the different $πN$ partial waves to the three-nucleon force. The division of the $πN$ amplitude into a pole and nonpole gives a unique procedure for the determination of the $πNN$ form factor in the model. The total contribution of the three-body force to the binding energy of the triton is found to be very small.16 page RevTeX manuscript, two figures available from authors I.R.Afnan@flinders.edu.au, to be published in Phys.Rev.CNuclear Theorytext